Identifying your 4.2L engine
02-24-2004, 12:06 AM
#51
Guest
Posts: n/a
Re: Identifying your 4.2L engine
This number is in a different format than the web site states. Looks like
the format changes in 1990 otherwise your number would be:
Year 1990
Month 63
Day Built 06
Doesn't fit the following format:
1. Year built code
2 & 3. Number of the month
4. Engine size/type code
5 & 6. Day built
However, this information does confirm Mike's position which is now very
clear.
It could be that the day code letters are two letter codes rather than the
single letter codes the CJs have but that's just guessing.
Bill
"KJ" <here@there.net> wrote in message
news:lhv_b.110535$B81.642696@twister.tampabay.rr.c om...
063CL06
1990 Jeep Wranger YJ w/ 258
So, 1990 year model w/ a 1986 block?
The C is close enough in stating that it is a "C- 258 2 bbl (4.2L, 76-89)",
but the "L" baffles me.
Anyone have a clue as to the "L" portion of the designation? The website
info. for the "L" doesn't make sense in this case.
When ordering parts, I usually tell the parts flunkies behind the counters
it's an 1989....I'll normally get the parts right that way since if I tell
them it's a 1990, they screw up more often.
"William Oliveri" <wuji@bigvalley.net> wrote in message
news:c1dq5v$1hmf4l$1@ID-193866.news.uni-berlin.de...
> Yeah, that'd be great. Look on the passenger side of the engine just
below
> the #3 and #2 spark plug holes on the block. There should be a flat plate
> there with some numbers and letters on it.
>
> What does it say?
>
> Thanks,
>
> Bill
>
> "KJ" <here@there.net> wrote in message
> news:t5t_b.110498$B81.629288@twister.tampabay.rr.c om...
> > I have a 1990 258 (now with a Weber carb.). Is there anyway I can
lookup
> > some info. for you guys to solve this mystery?
> >
> >
> >
> > "William Oliveri" <wuji@bigvalley.net> wrote in message
> > news:c18lrv$1g1r7h$1@ID-193866.news.uni-berlin.de...
> > > Ok, this is what I found out in case anyone is interested.
> > >
> > > There are two main codes on a block that can help identify a 4.2L
engine
> > >
> > > 1st. ENGINE DAY BUILD CODE. This is located on the passenger side of
> the
> > > block just below and between #3 and #2 spark plugs holes. It's a flat
> > plate
> > > and has this format:
> > >
> > > The Engine Day Build Code consists of six characters:
> > >
> > > 1. Year built code
> > > 2 & 3. Number of the month
> > > 4. Engine size/type code
> > > 5 & 6. Day built
> > >
> > > Mine is 012C05
> > >
> > > Which comes out to:
> > >
> > > 0=1980 or 1990
> > > 12=Dec
> > > C=2v carb
> > > 05=day of the month built
> > >
> > > See this site for more info:
> > > http://home.att.net/~farna/amtech/amcengcodes.htm
> > >
> > > I was unclear on whether this would be a 1980 or 1990 engine. To
> narrow
> > > it down I located the Engine Serial number (2nd main code) which is
> > located
> > > right behind the O2 Sensor on the Drivers side of the block.
> > >
> > > Mine reads: EF3235444
> > >
> > > When I looked for this number on remanufactured engine sites I see
> that
> > > this block serial number started in 1981 through 1990.
> > >
> > > Therefore the best determination I can make is this engine is a 1990
> > made
> > > engine.
> > >
> > >
> > > Hope this helps someone.
> > >
> > > Bill
> > >
> > >
> > >
> > >
> > >
> >
> >
>
>
>
the format changes in 1990 otherwise your number would be:
Year 1990
Month 63
Day Built 06
Doesn't fit the following format:
1. Year built code
2 & 3. Number of the month
4. Engine size/type code
5 & 6. Day built
However, this information does confirm Mike's position which is now very
clear.
It could be that the day code letters are two letter codes rather than the
single letter codes the CJs have but that's just guessing.
Bill
"KJ" <here@there.net> wrote in message
news:lhv_b.110535$B81.642696@twister.tampabay.rr.c om...
063CL06
1990 Jeep Wranger YJ w/ 258
So, 1990 year model w/ a 1986 block?
The C is close enough in stating that it is a "C- 258 2 bbl (4.2L, 76-89)",
but the "L" baffles me.
Anyone have a clue as to the "L" portion of the designation? The website
info. for the "L" doesn't make sense in this case.
When ordering parts, I usually tell the parts flunkies behind the counters
it's an 1989....I'll normally get the parts right that way since if I tell
them it's a 1990, they screw up more often.
"William Oliveri" <wuji@bigvalley.net> wrote in message
news:c1dq5v$1hmf4l$1@ID-193866.news.uni-berlin.de...
> Yeah, that'd be great. Look on the passenger side of the engine just
below
> the #3 and #2 spark plug holes on the block. There should be a flat plate
> there with some numbers and letters on it.
>
> What does it say?
>
> Thanks,
>
> Bill
>
> "KJ" <here@there.net> wrote in message
> news:t5t_b.110498$B81.629288@twister.tampabay.rr.c om...
> > I have a 1990 258 (now with a Weber carb.). Is there anyway I can
lookup
> > some info. for you guys to solve this mystery?
> >
> >
> >
> > "William Oliveri" <wuji@bigvalley.net> wrote in message
> > news:c18lrv$1g1r7h$1@ID-193866.news.uni-berlin.de...
> > > Ok, this is what I found out in case anyone is interested.
> > >
> > > There are two main codes on a block that can help identify a 4.2L
engine
> > >
> > > 1st. ENGINE DAY BUILD CODE. This is located on the passenger side of
> the
> > > block just below and between #3 and #2 spark plugs holes. It's a flat
> > plate
> > > and has this format:
> > >
> > > The Engine Day Build Code consists of six characters:
> > >
> > > 1. Year built code
> > > 2 & 3. Number of the month
> > > 4. Engine size/type code
> > > 5 & 6. Day built
> > >
> > > Mine is 012C05
> > >
> > > Which comes out to:
> > >
> > > 0=1980 or 1990
> > > 12=Dec
> > > C=2v carb
> > > 05=day of the month built
> > >
> > > See this site for more info:
> > > http://home.att.net/~farna/amtech/amcengcodes.htm
> > >
> > > I was unclear on whether this would be a 1980 or 1990 engine. To
> narrow
> > > it down I located the Engine Serial number (2nd main code) which is
> > located
> > > right behind the O2 Sensor on the Drivers side of the block.
> > >
> > > Mine reads: EF3235444
> > >
> > > When I looked for this number on remanufactured engine sites I see
> that
> > > this block serial number started in 1981 through 1990.
> > >
> > > Therefore the best determination I can make is this engine is a 1990
> > made
> > > engine.
> > >
> > >
> > > Hope this helps someone.
> > >
> > > Bill
> > >
> > >
> > >
> > >
> > >
> >
> >
>
>
>
02-24-2004, 12:06 AM
#52
Guest
Posts: n/a
Re: Identifying your 4.2L engine
This number is in a different format than the web site states. Looks like
the format changes in 1990 otherwise your number would be:
Year 1990
Month 63
Day Built 06
Doesn't fit the following format:
1. Year built code
2 & 3. Number of the month
4. Engine size/type code
5 & 6. Day built
However, this information does confirm Mike's position which is now very
clear.
It could be that the day code letters are two letter codes rather than the
single letter codes the CJs have but that's just guessing.
Bill
"KJ" <here@there.net> wrote in message
news:lhv_b.110535$B81.642696@twister.tampabay.rr.c om...
063CL06
1990 Jeep Wranger YJ w/ 258
So, 1990 year model w/ a 1986 block?
The C is close enough in stating that it is a "C- 258 2 bbl (4.2L, 76-89)",
but the "L" baffles me.
Anyone have a clue as to the "L" portion of the designation? The website
info. for the "L" doesn't make sense in this case.
When ordering parts, I usually tell the parts flunkies behind the counters
it's an 1989....I'll normally get the parts right that way since if I tell
them it's a 1990, they screw up more often.
"William Oliveri" <wuji@bigvalley.net> wrote in message
news:c1dq5v$1hmf4l$1@ID-193866.news.uni-berlin.de...
> Yeah, that'd be great. Look on the passenger side of the engine just
below
> the #3 and #2 spark plug holes on the block. There should be a flat plate
> there with some numbers and letters on it.
>
> What does it say?
>
> Thanks,
>
> Bill
>
> "KJ" <here@there.net> wrote in message
> news:t5t_b.110498$B81.629288@twister.tampabay.rr.c om...
> > I have a 1990 258 (now with a Weber carb.). Is there anyway I can
lookup
> > some info. for you guys to solve this mystery?
> >
> >
> >
> > "William Oliveri" <wuji@bigvalley.net> wrote in message
> > news:c18lrv$1g1r7h$1@ID-193866.news.uni-berlin.de...
> > > Ok, this is what I found out in case anyone is interested.
> > >
> > > There are two main codes on a block that can help identify a 4.2L
engine
> > >
> > > 1st. ENGINE DAY BUILD CODE. This is located on the passenger side of
> the
> > > block just below and between #3 and #2 spark plugs holes. It's a flat
> > plate
> > > and has this format:
> > >
> > > The Engine Day Build Code consists of six characters:
> > >
> > > 1. Year built code
> > > 2 & 3. Number of the month
> > > 4. Engine size/type code
> > > 5 & 6. Day built
> > >
> > > Mine is 012C05
> > >
> > > Which comes out to:
> > >
> > > 0=1980 or 1990
> > > 12=Dec
> > > C=2v carb
> > > 05=day of the month built
> > >
> > > See this site for more info:
> > > http://home.att.net/~farna/amtech/amcengcodes.htm
> > >
> > > I was unclear on whether this would be a 1980 or 1990 engine. To
> narrow
> > > it down I located the Engine Serial number (2nd main code) which is
> > located
> > > right behind the O2 Sensor on the Drivers side of the block.
> > >
> > > Mine reads: EF3235444
> > >
> > > When I looked for this number on remanufactured engine sites I see
> that
> > > this block serial number started in 1981 through 1990.
> > >
> > > Therefore the best determination I can make is this engine is a 1990
> > made
> > > engine.
> > >
> > >
> > > Hope this helps someone.
> > >
> > > Bill
> > >
> > >
> > >
> > >
> > >
> >
> >
>
>
>
the format changes in 1990 otherwise your number would be:
Year 1990
Month 63
Day Built 06
Doesn't fit the following format:
1. Year built code
2 & 3. Number of the month
4. Engine size/type code
5 & 6. Day built
However, this information does confirm Mike's position which is now very
clear.
It could be that the day code letters are two letter codes rather than the
single letter codes the CJs have but that's just guessing.
Bill
"KJ" <here@there.net> wrote in message
news:lhv_b.110535$B81.642696@twister.tampabay.rr.c om...
063CL06
1990 Jeep Wranger YJ w/ 258
So, 1990 year model w/ a 1986 block?
The C is close enough in stating that it is a "C- 258 2 bbl (4.2L, 76-89)",
but the "L" baffles me.
Anyone have a clue as to the "L" portion of the designation? The website
info. for the "L" doesn't make sense in this case.
When ordering parts, I usually tell the parts flunkies behind the counters
it's an 1989....I'll normally get the parts right that way since if I tell
them it's a 1990, they screw up more often.
"William Oliveri" <wuji@bigvalley.net> wrote in message
news:c1dq5v$1hmf4l$1@ID-193866.news.uni-berlin.de...
> Yeah, that'd be great. Look on the passenger side of the engine just
below
> the #3 and #2 spark plug holes on the block. There should be a flat plate
> there with some numbers and letters on it.
>
> What does it say?
>
> Thanks,
>
> Bill
>
> "KJ" <here@there.net> wrote in message
> news:t5t_b.110498$B81.629288@twister.tampabay.rr.c om...
> > I have a 1990 258 (now with a Weber carb.). Is there anyway I can
lookup
> > some info. for you guys to solve this mystery?
> >
> >
> >
> > "William Oliveri" <wuji@bigvalley.net> wrote in message
> > news:c18lrv$1g1r7h$1@ID-193866.news.uni-berlin.de...
> > > Ok, this is what I found out in case anyone is interested.
> > >
> > > There are two main codes on a block that can help identify a 4.2L
engine
> > >
> > > 1st. ENGINE DAY BUILD CODE. This is located on the passenger side of
> the
> > > block just below and between #3 and #2 spark plugs holes. It's a flat
> > plate
> > > and has this format:
> > >
> > > The Engine Day Build Code consists of six characters:
> > >
> > > 1. Year built code
> > > 2 & 3. Number of the month
> > > 4. Engine size/type code
> > > 5 & 6. Day built
> > >
> > > Mine is 012C05
> > >
> > > Which comes out to:
> > >
> > > 0=1980 or 1990
> > > 12=Dec
> > > C=2v carb
> > > 05=day of the month built
> > >
> > > See this site for more info:
> > > http://home.att.net/~farna/amtech/amcengcodes.htm
> > >
> > > I was unclear on whether this would be a 1980 or 1990 engine. To
> narrow
> > > it down I located the Engine Serial number (2nd main code) which is
> > located
> > > right behind the O2 Sensor on the Drivers side of the block.
> > >
> > > Mine reads: EF3235444
> > >
> > > When I looked for this number on remanufactured engine sites I see
> that
> > > this block serial number started in 1981 through 1990.
> > >
> > > Therefore the best determination I can make is this engine is a 1990
> > made
> > > engine.
> > >
> > >
> > > Hope this helps someone.
> > >
> > > Bill
> > >
> > >
> > >
> > >
> > >
> >
> >
>
>
>
02-24-2004, 12:14 AM
#53
Guest
Posts: n/a
Re: Identifying your 4.2L engine
bill-here's some more info about the engine-
Oversize or undersize components
look between the ignition coil and the distributor. there may be a couple
of letters stamped on a boss. here are the codes:
B - All cylinder bores (0.254mm (0.010") oversize)
M - All crankshaft main bearing journals (0.254mm (0.010") oversize)
P - All connecting rod bearing journals (0.254mm (0.010") oversize)
C - All camshaft bearing bores (0.254mm (0.010") oversize)
Example: if you see the letters "PM" you have crankshaft bearing journals
and connecting rod journals that are undersize.
this info is out of my factory manual-if you can afford them ($100 in 1998),
get a copy of it. it has sooo much info on everything on your car.
"William Oliveri" <wuji@bigvalley.net> wrote in message
news:c1dq5v$1hmf4l$1@ID-193866.news.uni-berlin.de...
> Yeah, that'd be great. Look on the passenger side of the engine just
below
> the #3 and #2 spark plug holes on the block. There should be a flat plate
> there with some numbers and letters on it.
>
> What does it say?
>
> Thanks,
>
> Bill
>
> "KJ" <here@there.net> wrote in message
> news:t5t_b.110498$B81.629288@twister.tampabay.rr.c om...
> > I have a 1990 258 (now with a Weber carb.). Is there anyway I can
lookup
> > some info. for you guys to solve this mystery?
> >
> >
> >
> > "William Oliveri" <wuji@bigvalley.net> wrote in message
> > news:c18lrv$1g1r7h$1@ID-193866.news.uni-berlin.de...
> > > Ok, this is what I found out in case anyone is interested.
> > >
> > > There are two main codes on a block that can help identify a 4.2L
engine
> > >
> > > 1st. ENGINE DAY BUILD CODE. This is located on the passenger side of
> the
> > > block just below and between #3 and #2 spark plugs holes. It's a flat
> > plate
> > > and has this format:
> > >
> > > The Engine Day Build Code consists of six characters:
> > >
> > > 1. Year built code
> > > 2 & 3. Number of the month
> > > 4. Engine size/type code
> > > 5 & 6. Day built
> > >
> > > Mine is 012C05
> > >
> > > Which comes out to:
> > >
> > > 0=1980 or 1990
> > > 12=Dec
> > > C=2v carb
> > > 05=day of the month built
> > >
> > > See this site for more info:
> > > http://home.att.net/~farna/amtech/amcengcodes.htm
> > >
> > > I was unclear on whether this would be a 1980 or 1990 engine. To
> narrow
> > > it down I located the Engine Serial number (2nd main code) which is
> > located
> > > right behind the O2 Sensor on the Drivers side of the block.
> > >
> > > Mine reads: EF3235444
> > >
> > > When I looked for this number on remanufactured engine sites I see
> that
> > > this block serial number started in 1981 through 1990.
> > >
> > > Therefore the best determination I can make is this engine is a 1990
> > made
> > > engine.
> > >
> > >
> > > Hope this helps someone.
> > >
> > > Bill
> > >
> > >
> > >
> > >
> > >
> >
> >
>
>
Oversize or undersize components
look between the ignition coil and the distributor. there may be a couple
of letters stamped on a boss. here are the codes:
B - All cylinder bores (0.254mm (0.010") oversize)
M - All crankshaft main bearing journals (0.254mm (0.010") oversize)
P - All connecting rod bearing journals (0.254mm (0.010") oversize)
C - All camshaft bearing bores (0.254mm (0.010") oversize)
Example: if you see the letters "PM" you have crankshaft bearing journals
and connecting rod journals that are undersize.
this info is out of my factory manual-if you can afford them ($100 in 1998),
get a copy of it. it has sooo much info on everything on your car.
"William Oliveri" <wuji@bigvalley.net> wrote in message
news:c1dq5v$1hmf4l$1@ID-193866.news.uni-berlin.de...
> Yeah, that'd be great. Look on the passenger side of the engine just
below
> the #3 and #2 spark plug holes on the block. There should be a flat plate
> there with some numbers and letters on it.
>
> What does it say?
>
> Thanks,
>
> Bill
>
> "KJ" <here@there.net> wrote in message
> news:t5t_b.110498$B81.629288@twister.tampabay.rr.c om...
> > I have a 1990 258 (now with a Weber carb.). Is there anyway I can
lookup
> > some info. for you guys to solve this mystery?
> >
> >
> >
> > "William Oliveri" <wuji@bigvalley.net> wrote in message
> > news:c18lrv$1g1r7h$1@ID-193866.news.uni-berlin.de...
> > > Ok, this is what I found out in case anyone is interested.
> > >
> > > There are two main codes on a block that can help identify a 4.2L
engine
> > >
> > > 1st. ENGINE DAY BUILD CODE. This is located on the passenger side of
> the
> > > block just below and between #3 and #2 spark plugs holes. It's a flat
> > plate
> > > and has this format:
> > >
> > > The Engine Day Build Code consists of six characters:
> > >
> > > 1. Year built code
> > > 2 & 3. Number of the month
> > > 4. Engine size/type code
> > > 5 & 6. Day built
> > >
> > > Mine is 012C05
> > >
> > > Which comes out to:
> > >
> > > 0=1980 or 1990
> > > 12=Dec
> > > C=2v carb
> > > 05=day of the month built
> > >
> > > See this site for more info:
> > > http://home.att.net/~farna/amtech/amcengcodes.htm
> > >
> > > I was unclear on whether this would be a 1980 or 1990 engine. To
> narrow
> > > it down I located the Engine Serial number (2nd main code) which is
> > located
> > > right behind the O2 Sensor on the Drivers side of the block.
> > >
> > > Mine reads: EF3235444
> > >
> > > When I looked for this number on remanufactured engine sites I see
> that
> > > this block serial number started in 1981 through 1990.
> > >
> > > Therefore the best determination I can make is this engine is a 1990
> > made
> > > engine.
> > >
> > >
> > > Hope this helps someone.
> > >
> > > Bill
> > >
> > >
> > >
> > >
> > >
> >
> >
>
>
02-24-2004, 12:14 AM
#54
Guest
Posts: n/a
Re: Identifying your 4.2L engine
bill-here's some more info about the engine-
Oversize or undersize components
look between the ignition coil and the distributor. there may be a couple
of letters stamped on a boss. here are the codes:
B - All cylinder bores (0.254mm (0.010") oversize)
M - All crankshaft main bearing journals (0.254mm (0.010") oversize)
P - All connecting rod bearing journals (0.254mm (0.010") oversize)
C - All camshaft bearing bores (0.254mm (0.010") oversize)
Example: if you see the letters "PM" you have crankshaft bearing journals
and connecting rod journals that are undersize.
this info is out of my factory manual-if you can afford them ($100 in 1998),
get a copy of it. it has sooo much info on everything on your car.
"William Oliveri" <wuji@bigvalley.net> wrote in message
news:c1dq5v$1hmf4l$1@ID-193866.news.uni-berlin.de...
> Yeah, that'd be great. Look on the passenger side of the engine just
below
> the #3 and #2 spark plug holes on the block. There should be a flat plate
> there with some numbers and letters on it.
>
> What does it say?
>
> Thanks,
>
> Bill
>
> "KJ" <here@there.net> wrote in message
> news:t5t_b.110498$B81.629288@twister.tampabay.rr.c om...
> > I have a 1990 258 (now with a Weber carb.). Is there anyway I can
lookup
> > some info. for you guys to solve this mystery?
> >
> >
> >
> > "William Oliveri" <wuji@bigvalley.net> wrote in message
> > news:c18lrv$1g1r7h$1@ID-193866.news.uni-berlin.de...
> > > Ok, this is what I found out in case anyone is interested.
> > >
> > > There are two main codes on a block that can help identify a 4.2L
engine
> > >
> > > 1st. ENGINE DAY BUILD CODE. This is located on the passenger side of
> the
> > > block just below and between #3 and #2 spark plugs holes. It's a flat
> > plate
> > > and has this format:
> > >
> > > The Engine Day Build Code consists of six characters:
> > >
> > > 1. Year built code
> > > 2 & 3. Number of the month
> > > 4. Engine size/type code
> > > 5 & 6. Day built
> > >
> > > Mine is 012C05
> > >
> > > Which comes out to:
> > >
> > > 0=1980 or 1990
> > > 12=Dec
> > > C=2v carb
> > > 05=day of the month built
> > >
> > > See this site for more info:
> > > http://home.att.net/~farna/amtech/amcengcodes.htm
> > >
> > > I was unclear on whether this would be a 1980 or 1990 engine. To
> narrow
> > > it down I located the Engine Serial number (2nd main code) which is
> > located
> > > right behind the O2 Sensor on the Drivers side of the block.
> > >
> > > Mine reads: EF3235444
> > >
> > > When I looked for this number on remanufactured engine sites I see
> that
> > > this block serial number started in 1981 through 1990.
> > >
> > > Therefore the best determination I can make is this engine is a 1990
> > made
> > > engine.
> > >
> > >
> > > Hope this helps someone.
> > >
> > > Bill
> > >
> > >
> > >
> > >
> > >
> >
> >
>
>
Oversize or undersize components
look between the ignition coil and the distributor. there may be a couple
of letters stamped on a boss. here are the codes:
B - All cylinder bores (0.254mm (0.010") oversize)
M - All crankshaft main bearing journals (0.254mm (0.010") oversize)
P - All connecting rod bearing journals (0.254mm (0.010") oversize)
C - All camshaft bearing bores (0.254mm (0.010") oversize)
Example: if you see the letters "PM" you have crankshaft bearing journals
and connecting rod journals that are undersize.
this info is out of my factory manual-if you can afford them ($100 in 1998),
get a copy of it. it has sooo much info on everything on your car.
"William Oliveri" <wuji@bigvalley.net> wrote in message
news:c1dq5v$1hmf4l$1@ID-193866.news.uni-berlin.de...
> Yeah, that'd be great. Look on the passenger side of the engine just
below
> the #3 and #2 spark plug holes on the block. There should be a flat plate
> there with some numbers and letters on it.
>
> What does it say?
>
> Thanks,
>
> Bill
>
> "KJ" <here@there.net> wrote in message
> news:t5t_b.110498$B81.629288@twister.tampabay.rr.c om...
> > I have a 1990 258 (now with a Weber carb.). Is there anyway I can
lookup
> > some info. for you guys to solve this mystery?
> >
> >
> >
> > "William Oliveri" <wuji@bigvalley.net> wrote in message
> > news:c18lrv$1g1r7h$1@ID-193866.news.uni-berlin.de...
> > > Ok, this is what I found out in case anyone is interested.
> > >
> > > There are two main codes on a block that can help identify a 4.2L
engine
> > >
> > > 1st. ENGINE DAY BUILD CODE. This is located on the passenger side of
> the
> > > block just below and between #3 and #2 spark plugs holes. It's a flat
> > plate
> > > and has this format:
> > >
> > > The Engine Day Build Code consists of six characters:
> > >
> > > 1. Year built code
> > > 2 & 3. Number of the month
> > > 4. Engine size/type code
> > > 5 & 6. Day built
> > >
> > > Mine is 012C05
> > >
> > > Which comes out to:
> > >
> > > 0=1980 or 1990
> > > 12=Dec
> > > C=2v carb
> > > 05=day of the month built
> > >
> > > See this site for more info:
> > > http://home.att.net/~farna/amtech/amcengcodes.htm
> > >
> > > I was unclear on whether this would be a 1980 or 1990 engine. To
> narrow
> > > it down I located the Engine Serial number (2nd main code) which is
> > located
> > > right behind the O2 Sensor on the Drivers side of the block.
> > >
> > > Mine reads: EF3235444
> > >
> > > When I looked for this number on remanufactured engine sites I see
> that
> > > this block serial number started in 1981 through 1990.
> > >
> > > Therefore the best determination I can make is this engine is a 1990
> > made
> > > engine.
> > >
> > >
> > > Hope this helps someone.
> > >
> > > Bill
> > >
> > >
> > >
> > >
> > >
> >
> >
>
>
02-24-2004, 12:14 AM
#55
Guest
Posts: n/a
Re: Identifying your 4.2L engine
bill-here's some more info about the engine-
Oversize or undersize components
look between the ignition coil and the distributor. there may be a couple
of letters stamped on a boss. here are the codes:
B - All cylinder bores (0.254mm (0.010") oversize)
M - All crankshaft main bearing journals (0.254mm (0.010") oversize)
P - All connecting rod bearing journals (0.254mm (0.010") oversize)
C - All camshaft bearing bores (0.254mm (0.010") oversize)
Example: if you see the letters "PM" you have crankshaft bearing journals
and connecting rod journals that are undersize.
this info is out of my factory manual-if you can afford them ($100 in 1998),
get a copy of it. it has sooo much info on everything on your car.
"William Oliveri" <wuji@bigvalley.net> wrote in message
news:c1dq5v$1hmf4l$1@ID-193866.news.uni-berlin.de...
> Yeah, that'd be great. Look on the passenger side of the engine just
below
> the #3 and #2 spark plug holes on the block. There should be a flat plate
> there with some numbers and letters on it.
>
> What does it say?
>
> Thanks,
>
> Bill
>
> "KJ" <here@there.net> wrote in message
> news:t5t_b.110498$B81.629288@twister.tampabay.rr.c om...
> > I have a 1990 258 (now with a Weber carb.). Is there anyway I can
lookup
> > some info. for you guys to solve this mystery?
> >
> >
> >
> > "William Oliveri" <wuji@bigvalley.net> wrote in message
> > news:c18lrv$1g1r7h$1@ID-193866.news.uni-berlin.de...
> > > Ok, this is what I found out in case anyone is interested.
> > >
> > > There are two main codes on a block that can help identify a 4.2L
engine
> > >
> > > 1st. ENGINE DAY BUILD CODE. This is located on the passenger side of
> the
> > > block just below and between #3 and #2 spark plugs holes. It's a flat
> > plate
> > > and has this format:
> > >
> > > The Engine Day Build Code consists of six characters:
> > >
> > > 1. Year built code
> > > 2 & 3. Number of the month
> > > 4. Engine size/type code
> > > 5 & 6. Day built
> > >
> > > Mine is 012C05
> > >
> > > Which comes out to:
> > >
> > > 0=1980 or 1990
> > > 12=Dec
> > > C=2v carb
> > > 05=day of the month built
> > >
> > > See this site for more info:
> > > http://home.att.net/~farna/amtech/amcengcodes.htm
> > >
> > > I was unclear on whether this would be a 1980 or 1990 engine. To
> narrow
> > > it down I located the Engine Serial number (2nd main code) which is
> > located
> > > right behind the O2 Sensor on the Drivers side of the block.
> > >
> > > Mine reads: EF3235444
> > >
> > > When I looked for this number on remanufactured engine sites I see
> that
> > > this block serial number started in 1981 through 1990.
> > >
> > > Therefore the best determination I can make is this engine is a 1990
> > made
> > > engine.
> > >
> > >
> > > Hope this helps someone.
> > >
> > > Bill
> > >
> > >
> > >
> > >
> > >
> >
> >
>
>
Oversize or undersize components
look between the ignition coil and the distributor. there may be a couple
of letters stamped on a boss. here are the codes:
B - All cylinder bores (0.254mm (0.010") oversize)
M - All crankshaft main bearing journals (0.254mm (0.010") oversize)
P - All connecting rod bearing journals (0.254mm (0.010") oversize)
C - All camshaft bearing bores (0.254mm (0.010") oversize)
Example: if you see the letters "PM" you have crankshaft bearing journals
and connecting rod journals that are undersize.
this info is out of my factory manual-if you can afford them ($100 in 1998),
get a copy of it. it has sooo much info on everything on your car.
"William Oliveri" <wuji@bigvalley.net> wrote in message
news:c1dq5v$1hmf4l$1@ID-193866.news.uni-berlin.de...
> Yeah, that'd be great. Look on the passenger side of the engine just
below
> the #3 and #2 spark plug holes on the block. There should be a flat plate
> there with some numbers and letters on it.
>
> What does it say?
>
> Thanks,
>
> Bill
>
> "KJ" <here@there.net> wrote in message
> news:t5t_b.110498$B81.629288@twister.tampabay.rr.c om...
> > I have a 1990 258 (now with a Weber carb.). Is there anyway I can
lookup
> > some info. for you guys to solve this mystery?
> >
> >
> >
> > "William Oliveri" <wuji@bigvalley.net> wrote in message
> > news:c18lrv$1g1r7h$1@ID-193866.news.uni-berlin.de...
> > > Ok, this is what I found out in case anyone is interested.
> > >
> > > There are two main codes on a block that can help identify a 4.2L
engine
> > >
> > > 1st. ENGINE DAY BUILD CODE. This is located on the passenger side of
> the
> > > block just below and between #3 and #2 spark plugs holes. It's a flat
> > plate
> > > and has this format:
> > >
> > > The Engine Day Build Code consists of six characters:
> > >
> > > 1. Year built code
> > > 2 & 3. Number of the month
> > > 4. Engine size/type code
> > > 5 & 6. Day built
> > >
> > > Mine is 012C05
> > >
> > > Which comes out to:
> > >
> > > 0=1980 or 1990
> > > 12=Dec
> > > C=2v carb
> > > 05=day of the month built
> > >
> > > See this site for more info:
> > > http://home.att.net/~farna/amtech/amcengcodes.htm
> > >
> > > I was unclear on whether this would be a 1980 or 1990 engine. To
> narrow
> > > it down I located the Engine Serial number (2nd main code) which is
> > located
> > > right behind the O2 Sensor on the Drivers side of the block.
> > >
> > > Mine reads: EF3235444
> > >
> > > When I looked for this number on remanufactured engine sites I see
> that
> > > this block serial number started in 1981 through 1990.
> > >
> > > Therefore the best determination I can make is this engine is a 1990
> > made
> > > engine.
> > >
> > >
> > > Hope this helps someone.
> > >
> > > Bill
> > >
> > >
> > >
> > >
> > >
> >
> >
>
>
02-24-2004, 12:18 AM
#56
Guest
Posts: n/a
Re: Identifying your 4.2L engine
Thanks Serg,
Yeah, the FSM I have is the first thing I checked but it was not very
telling that year I guess. Probably gets better as the years go by.
Thanks for the info.
Bill
"serg" <none@none.com> wrote in message
news:L4B_b.1885$3Y7.1162@newssvr27.news.prodigy.co m...
> bill-here's some more info about the engine-
> Oversize or undersize components
> look between the ignition coil and the distributor. there may be a couple
> of letters stamped on a boss. here are the codes:
>
> B - All cylinder bores (0.254mm (0.010") oversize)
> M - All crankshaft main bearing journals (0.254mm (0.010") oversize)
> P - All connecting rod bearing journals (0.254mm (0.010") oversize)
> C - All camshaft bearing bores (0.254mm (0.010") oversize)
>
> Example: if you see the letters "PM" you have crankshaft bearing journals
> and connecting rod journals that are undersize.
>
> this info is out of my factory manual-if you can afford them ($100 in
1998),
> get a copy of it. it has sooo much info on everything on your car.
>
>
>
>
> "William Oliveri" <wuji@bigvalley.net> wrote in message
> news:c1dq5v$1hmf4l$1@ID-193866.news.uni-berlin.de...
> > Yeah, that'd be great. Look on the passenger side of the engine just
> below
> > the #3 and #2 spark plug holes on the block. There should be a flat
plate
> > there with some numbers and letters on it.
> >
> > What does it say?
> >
> > Thanks,
> >
> > Bill
> >
> > "KJ" <here@there.net> wrote in message
> > news:t5t_b.110498$B81.629288@twister.tampabay.rr.c om...
> > > I have a 1990 258 (now with a Weber carb.). Is there anyway I can
> lookup
> > > some info. for you guys to solve this mystery?
> > >
> > >
> > >
> > > "William Oliveri" <wuji@bigvalley.net> wrote in message
> > > news:c18lrv$1g1r7h$1@ID-193866.news.uni-berlin.de...
> > > > Ok, this is what I found out in case anyone is interested.
> > > >
> > > > There are two main codes on a block that can help identify a 4.2L
> engine
> > > >
> > > > 1st. ENGINE DAY BUILD CODE. This is located on the passenger side
of
> > the
> > > > block just below and between #3 and #2 spark plugs holes. It's a
flat
> > > plate
> > > > and has this format:
> > > >
> > > > The Engine Day Build Code consists of six characters:
> > > >
> > > > 1. Year built code
> > > > 2 & 3. Number of the month
> > > > 4. Engine size/type code
> > > > 5 & 6. Day built
> > > >
> > > > Mine is 012C05
> > > >
> > > > Which comes out to:
> > > >
> > > > 0=1980 or 1990
> > > > 12=Dec
> > > > C=2v carb
> > > > 05=day of the month built
> > > >
> > > > See this site for more info:
> > > > http://home.att.net/~farna/amtech/amcengcodes.htm
> > > >
> > > > I was unclear on whether this would be a 1980 or 1990 engine. To
> > narrow
> > > > it down I located the Engine Serial number (2nd main code) which is
> > > located
> > > > right behind the O2 Sensor on the Drivers side of the block.
> > > >
> > > > Mine reads: EF3235444
> > > >
> > > > When I looked for this number on remanufactured engine sites I see
> > that
> > > > this block serial number started in 1981 through 1990.
> > > >
> > > > Therefore the best determination I can make is this engine is a
1990
> > > made
> > > > engine.
> > > >
> > > >
> > > > Hope this helps someone.
> > > >
> > > > Bill
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>
Yeah, the FSM I have is the first thing I checked but it was not very
telling that year I guess. Probably gets better as the years go by.
Thanks for the info.
Bill
"serg" <none@none.com> wrote in message
news:L4B_b.1885$3Y7.1162@newssvr27.news.prodigy.co m...
> bill-here's some more info about the engine-
> Oversize or undersize components
> look between the ignition coil and the distributor. there may be a couple
> of letters stamped on a boss. here are the codes:
>
> B - All cylinder bores (0.254mm (0.010") oversize)
> M - All crankshaft main bearing journals (0.254mm (0.010") oversize)
> P - All connecting rod bearing journals (0.254mm (0.010") oversize)
> C - All camshaft bearing bores (0.254mm (0.010") oversize)
>
> Example: if you see the letters "PM" you have crankshaft bearing journals
> and connecting rod journals that are undersize.
>
> this info is out of my factory manual-if you can afford them ($100 in
1998),
> get a copy of it. it has sooo much info on everything on your car.
>
>
>
>
> "William Oliveri" <wuji@bigvalley.net> wrote in message
> news:c1dq5v$1hmf4l$1@ID-193866.news.uni-berlin.de...
> > Yeah, that'd be great. Look on the passenger side of the engine just
> below
> > the #3 and #2 spark plug holes on the block. There should be a flat
plate
> > there with some numbers and letters on it.
> >
> > What does it say?
> >
> > Thanks,
> >
> > Bill
> >
> > "KJ" <here@there.net> wrote in message
> > news:t5t_b.110498$B81.629288@twister.tampabay.rr.c om...
> > > I have a 1990 258 (now with a Weber carb.). Is there anyway I can
> lookup
> > > some info. for you guys to solve this mystery?
> > >
> > >
> > >
> > > "William Oliveri" <wuji@bigvalley.net> wrote in message
> > > news:c18lrv$1g1r7h$1@ID-193866.news.uni-berlin.de...
> > > > Ok, this is what I found out in case anyone is interested.
> > > >
> > > > There are two main codes on a block that can help identify a 4.2L
> engine
> > > >
> > > > 1st. ENGINE DAY BUILD CODE. This is located on the passenger side
of
> > the
> > > > block just below and between #3 and #2 spark plugs holes. It's a
flat
> > > plate
> > > > and has this format:
> > > >
> > > > The Engine Day Build Code consists of six characters:
> > > >
> > > > 1. Year built code
> > > > 2 & 3. Number of the month
> > > > 4. Engine size/type code
> > > > 5 & 6. Day built
> > > >
> > > > Mine is 012C05
> > > >
> > > > Which comes out to:
> > > >
> > > > 0=1980 or 1990
> > > > 12=Dec
> > > > C=2v carb
> > > > 05=day of the month built
> > > >
> > > > See this site for more info:
> > > > http://home.att.net/~farna/amtech/amcengcodes.htm
> > > >
> > > > I was unclear on whether this would be a 1980 or 1990 engine. To
> > narrow
> > > > it down I located the Engine Serial number (2nd main code) which is
> > > located
> > > > right behind the O2 Sensor on the Drivers side of the block.
> > > >
> > > > Mine reads: EF3235444
> > > >
> > > > When I looked for this number on remanufactured engine sites I see
> > that
> > > > this block serial number started in 1981 through 1990.
> > > >
> > > > Therefore the best determination I can make is this engine is a
1990
> > > made
> > > > engine.
> > > >
> > > >
> > > > Hope this helps someone.
> > > >
> > > > Bill
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>
02-24-2004, 12:18 AM
#57
Guest
Posts: n/a
Re: Identifying your 4.2L engine
Thanks Serg,
Yeah, the FSM I have is the first thing I checked but it was not very
telling that year I guess. Probably gets better as the years go by.
Thanks for the info.
Bill
"serg" <none@none.com> wrote in message
news:L4B_b.1885$3Y7.1162@newssvr27.news.prodigy.co m...
> bill-here's some more info about the engine-
> Oversize or undersize components
> look between the ignition coil and the distributor. there may be a couple
> of letters stamped on a boss. here are the codes:
>
> B - All cylinder bores (0.254mm (0.010") oversize)
> M - All crankshaft main bearing journals (0.254mm (0.010") oversize)
> P - All connecting rod bearing journals (0.254mm (0.010") oversize)
> C - All camshaft bearing bores (0.254mm (0.010") oversize)
>
> Example: if you see the letters "PM" you have crankshaft bearing journals
> and connecting rod journals that are undersize.
>
> this info is out of my factory manual-if you can afford them ($100 in
1998),
> get a copy of it. it has sooo much info on everything on your car.
>
>
>
>
> "William Oliveri" <wuji@bigvalley.net> wrote in message
> news:c1dq5v$1hmf4l$1@ID-193866.news.uni-berlin.de...
> > Yeah, that'd be great. Look on the passenger side of the engine just
> below
> > the #3 and #2 spark plug holes on the block. There should be a flat
plate
> > there with some numbers and letters on it.
> >
> > What does it say?
> >
> > Thanks,
> >
> > Bill
> >
> > "KJ" <here@there.net> wrote in message
> > news:t5t_b.110498$B81.629288@twister.tampabay.rr.c om...
> > > I have a 1990 258 (now with a Weber carb.). Is there anyway I can
> lookup
> > > some info. for you guys to solve this mystery?
> > >
> > >
> > >
> > > "William Oliveri" <wuji@bigvalley.net> wrote in message
> > > news:c18lrv$1g1r7h$1@ID-193866.news.uni-berlin.de...
> > > > Ok, this is what I found out in case anyone is interested.
> > > >
> > > > There are two main codes on a block that can help identify a 4.2L
> engine
> > > >
> > > > 1st. ENGINE DAY BUILD CODE. This is located on the passenger side
of
> > the
> > > > block just below and between #3 and #2 spark plugs holes. It's a
flat
> > > plate
> > > > and has this format:
> > > >
> > > > The Engine Day Build Code consists of six characters:
> > > >
> > > > 1. Year built code
> > > > 2 & 3. Number of the month
> > > > 4. Engine size/type code
> > > > 5 & 6. Day built
> > > >
> > > > Mine is 012C05
> > > >
> > > > Which comes out to:
> > > >
> > > > 0=1980 or 1990
> > > > 12=Dec
> > > > C=2v carb
> > > > 05=day of the month built
> > > >
> > > > See this site for more info:
> > > > http://home.att.net/~farna/amtech/amcengcodes.htm
> > > >
> > > > I was unclear on whether this would be a 1980 or 1990 engine. To
> > narrow
> > > > it down I located the Engine Serial number (2nd main code) which is
> > > located
> > > > right behind the O2 Sensor on the Drivers side of the block.
> > > >
> > > > Mine reads: EF3235444
> > > >
> > > > When I looked for this number on remanufactured engine sites I see
> > that
> > > > this block serial number started in 1981 through 1990.
> > > >
> > > > Therefore the best determination I can make is this engine is a
1990
> > > made
> > > > engine.
> > > >
> > > >
> > > > Hope this helps someone.
> > > >
> > > > Bill
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>
Yeah, the FSM I have is the first thing I checked but it was not very
telling that year I guess. Probably gets better as the years go by.
Thanks for the info.
Bill
"serg" <none@none.com> wrote in message
news:L4B_b.1885$3Y7.1162@newssvr27.news.prodigy.co m...
> bill-here's some more info about the engine-
> Oversize or undersize components
> look between the ignition coil and the distributor. there may be a couple
> of letters stamped on a boss. here are the codes:
>
> B - All cylinder bores (0.254mm (0.010") oversize)
> M - All crankshaft main bearing journals (0.254mm (0.010") oversize)
> P - All connecting rod bearing journals (0.254mm (0.010") oversize)
> C - All camshaft bearing bores (0.254mm (0.010") oversize)
>
> Example: if you see the letters "PM" you have crankshaft bearing journals
> and connecting rod journals that are undersize.
>
> this info is out of my factory manual-if you can afford them ($100 in
1998),
> get a copy of it. it has sooo much info on everything on your car.
>
>
>
>
> "William Oliveri" <wuji@bigvalley.net> wrote in message
> news:c1dq5v$1hmf4l$1@ID-193866.news.uni-berlin.de...
> > Yeah, that'd be great. Look on the passenger side of the engine just
> below
> > the #3 and #2 spark plug holes on the block. There should be a flat
plate
> > there with some numbers and letters on it.
> >
> > What does it say?
> >
> > Thanks,
> >
> > Bill
> >
> > "KJ" <here@there.net> wrote in message
> > news:t5t_b.110498$B81.629288@twister.tampabay.rr.c om...
> > > I have a 1990 258 (now with a Weber carb.). Is there anyway I can
> lookup
> > > some info. for you guys to solve this mystery?
> > >
> > >
> > >
> > > "William Oliveri" <wuji@bigvalley.net> wrote in message
> > > news:c18lrv$1g1r7h$1@ID-193866.news.uni-berlin.de...
> > > > Ok, this is what I found out in case anyone is interested.
> > > >
> > > > There are two main codes on a block that can help identify a 4.2L
> engine
> > > >
> > > > 1st. ENGINE DAY BUILD CODE. This is located on the passenger side
of
> > the
> > > > block just below and between #3 and #2 spark plugs holes. It's a
flat
> > > plate
> > > > and has this format:
> > > >
> > > > The Engine Day Build Code consists of six characters:
> > > >
> > > > 1. Year built code
> > > > 2 & 3. Number of the month
> > > > 4. Engine size/type code
> > > > 5 & 6. Day built
> > > >
> > > > Mine is 012C05
> > > >
> > > > Which comes out to:
> > > >
> > > > 0=1980 or 1990
> > > > 12=Dec
> > > > C=2v carb
> > > > 05=day of the month built
> > > >
> > > > See this site for more info:
> > > > http://home.att.net/~farna/amtech/amcengcodes.htm
> > > >
> > > > I was unclear on whether this would be a 1980 or 1990 engine. To
> > narrow
> > > > it down I located the Engine Serial number (2nd main code) which is
> > > located
> > > > right behind the O2 Sensor on the Drivers side of the block.
> > > >
> > > > Mine reads: EF3235444
> > > >
> > > > When I looked for this number on remanufactured engine sites I see
> > that
> > > > this block serial number started in 1981 through 1990.
> > > >
> > > > Therefore the best determination I can make is this engine is a
1990
> > > made
> > > > engine.
> > > >
> > > >
> > > > Hope this helps someone.
> > > >
> > > > Bill
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>
02-24-2004, 12:18 AM
#58
Guest
Posts: n/a
Re: Identifying your 4.2L engine
Thanks Serg,
Yeah, the FSM I have is the first thing I checked but it was not very
telling that year I guess. Probably gets better as the years go by.
Thanks for the info.
Bill
"serg" <none@none.com> wrote in message
news:L4B_b.1885$3Y7.1162@newssvr27.news.prodigy.co m...
> bill-here's some more info about the engine-
> Oversize or undersize components
> look between the ignition coil and the distributor. there may be a couple
> of letters stamped on a boss. here are the codes:
>
> B - All cylinder bores (0.254mm (0.010") oversize)
> M - All crankshaft main bearing journals (0.254mm (0.010") oversize)
> P - All connecting rod bearing journals (0.254mm (0.010") oversize)
> C - All camshaft bearing bores (0.254mm (0.010") oversize)
>
> Example: if you see the letters "PM" you have crankshaft bearing journals
> and connecting rod journals that are undersize.
>
> this info is out of my factory manual-if you can afford them ($100 in
1998),
> get a copy of it. it has sooo much info on everything on your car.
>
>
>
>
> "William Oliveri" <wuji@bigvalley.net> wrote in message
> news:c1dq5v$1hmf4l$1@ID-193866.news.uni-berlin.de...
> > Yeah, that'd be great. Look on the passenger side of the engine just
> below
> > the #3 and #2 spark plug holes on the block. There should be a flat
plate
> > there with some numbers and letters on it.
> >
> > What does it say?
> >
> > Thanks,
> >
> > Bill
> >
> > "KJ" <here@there.net> wrote in message
> > news:t5t_b.110498$B81.629288@twister.tampabay.rr.c om...
> > > I have a 1990 258 (now with a Weber carb.). Is there anyway I can
> lookup
> > > some info. for you guys to solve this mystery?
> > >
> > >
> > >
> > > "William Oliveri" <wuji@bigvalley.net> wrote in message
> > > news:c18lrv$1g1r7h$1@ID-193866.news.uni-berlin.de...
> > > > Ok, this is what I found out in case anyone is interested.
> > > >
> > > > There are two main codes on a block that can help identify a 4.2L
> engine
> > > >
> > > > 1st. ENGINE DAY BUILD CODE. This is located on the passenger side
of
> > the
> > > > block just below and between #3 and #2 spark plugs holes. It's a
flat
> > > plate
> > > > and has this format:
> > > >
> > > > The Engine Day Build Code consists of six characters:
> > > >
> > > > 1. Year built code
> > > > 2 & 3. Number of the month
> > > > 4. Engine size/type code
> > > > 5 & 6. Day built
> > > >
> > > > Mine is 012C05
> > > >
> > > > Which comes out to:
> > > >
> > > > 0=1980 or 1990
> > > > 12=Dec
> > > > C=2v carb
> > > > 05=day of the month built
> > > >
> > > > See this site for more info:
> > > > http://home.att.net/~farna/amtech/amcengcodes.htm
> > > >
> > > > I was unclear on whether this would be a 1980 or 1990 engine. To
> > narrow
> > > > it down I located the Engine Serial number (2nd main code) which is
> > > located
> > > > right behind the O2 Sensor on the Drivers side of the block.
> > > >
> > > > Mine reads: EF3235444
> > > >
> > > > When I looked for this number on remanufactured engine sites I see
> > that
> > > > this block serial number started in 1981 through 1990.
> > > >
> > > > Therefore the best determination I can make is this engine is a
1990
> > > made
> > > > engine.
> > > >
> > > >
> > > > Hope this helps someone.
> > > >
> > > > Bill
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>
Yeah, the FSM I have is the first thing I checked but it was not very
telling that year I guess. Probably gets better as the years go by.
Thanks for the info.
Bill
"serg" <none@none.com> wrote in message
news:L4B_b.1885$3Y7.1162@newssvr27.news.prodigy.co m...
> bill-here's some more info about the engine-
> Oversize or undersize components
> look between the ignition coil and the distributor. there may be a couple
> of letters stamped on a boss. here are the codes:
>
> B - All cylinder bores (0.254mm (0.010") oversize)
> M - All crankshaft main bearing journals (0.254mm (0.010") oversize)
> P - All connecting rod bearing journals (0.254mm (0.010") oversize)
> C - All camshaft bearing bores (0.254mm (0.010") oversize)
>
> Example: if you see the letters "PM" you have crankshaft bearing journals
> and connecting rod journals that are undersize.
>
> this info is out of my factory manual-if you can afford them ($100 in
1998),
> get a copy of it. it has sooo much info on everything on your car.
>
>
>
>
> "William Oliveri" <wuji@bigvalley.net> wrote in message
> news:c1dq5v$1hmf4l$1@ID-193866.news.uni-berlin.de...
> > Yeah, that'd be great. Look on the passenger side of the engine just
> below
> > the #3 and #2 spark plug holes on the block. There should be a flat
plate
> > there with some numbers and letters on it.
> >
> > What does it say?
> >
> > Thanks,
> >
> > Bill
> >
> > "KJ" <here@there.net> wrote in message
> > news:t5t_b.110498$B81.629288@twister.tampabay.rr.c om...
> > > I have a 1990 258 (now with a Weber carb.). Is there anyway I can
> lookup
> > > some info. for you guys to solve this mystery?
> > >
> > >
> > >
> > > "William Oliveri" <wuji@bigvalley.net> wrote in message
> > > news:c18lrv$1g1r7h$1@ID-193866.news.uni-berlin.de...
> > > > Ok, this is what I found out in case anyone is interested.
> > > >
> > > > There are two main codes on a block that can help identify a 4.2L
> engine
> > > >
> > > > 1st. ENGINE DAY BUILD CODE. This is located on the passenger side
of
> > the
> > > > block just below and between #3 and #2 spark plugs holes. It's a
flat
> > > plate
> > > > and has this format:
> > > >
> > > > The Engine Day Build Code consists of six characters:
> > > >
> > > > 1. Year built code
> > > > 2 & 3. Number of the month
> > > > 4. Engine size/type code
> > > > 5 & 6. Day built
> > > >
> > > > Mine is 012C05
> > > >
> > > > Which comes out to:
> > > >
> > > > 0=1980 or 1990
> > > > 12=Dec
> > > > C=2v carb
> > > > 05=day of the month built
> > > >
> > > > See this site for more info:
> > > > http://home.att.net/~farna/amtech/amcengcodes.htm
> > > >
> > > > I was unclear on whether this would be a 1980 or 1990 engine. To
> > narrow
> > > > it down I located the Engine Serial number (2nd main code) which is
> > > located
> > > > right behind the O2 Sensor on the Drivers side of the block.
> > > >
> > > > Mine reads: EF3235444
> > > >
> > > > When I looked for this number on remanufactured engine sites I see
> > that
> > > > this block serial number started in 1981 through 1990.
> > > >
> > > > Therefore the best determination I can make is this engine is a
1990
> > > made
> > > > engine.
> > > >
> > > >
> > > > Hope this helps someone.
> > > >
> > > > Bill
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>
02-24-2004, 12:58 PM
#59
Guest
Posts: n/a
Re: Identifying your 4.2L engine
On Mon, 23 Feb 2004, William Oliveri wrote:
> Correct me if I'm wrong but the term "short block" is referring to the
> engine without the head. "Long Block" would be referring to the engine with
> the head.
You are correct, I am wrong.
I could make an excuse of mentally tripping over "small block", but really
I was just wrong.
I am still curious if it has a steel or plastic valve cover, though.
> Correct me if I'm wrong but the term "short block" is referring to the
> engine without the head. "Long Block" would be referring to the engine with
> the head.
You are correct, I am wrong.
I could make an excuse of mentally tripping over "small block", but really
I was just wrong.
I am still curious if it has a steel or plastic valve cover, though.
02-24-2004, 12:58 PM
#60
Guest
Posts: n/a
Re: Identifying your 4.2L engine
On Mon, 23 Feb 2004, William Oliveri wrote:
> Correct me if I'm wrong but the term "short block" is referring to the
> engine without the head. "Long Block" would be referring to the engine with
> the head.
You are correct, I am wrong.
I could make an excuse of mentally tripping over "small block", but really
I was just wrong.
I am still curious if it has a steel or plastic valve cover, though.
> Correct me if I'm wrong but the term "short block" is referring to the
> engine without the head. "Long Block" would be referring to the engine with
> the head.
You are correct, I am wrong.
I could make an excuse of mentally tripping over "small block", but really
I was just wrong.
I am still curious if it has a steel or plastic valve cover, though.