Help! doing the 4.0 head swap on a 258!
#61
Guest
Posts: n/a
Re: Help! doing the 4.0 head swap on a 258!
No Bill, it's all the cylinders. I just used #1 as the example since its
where any good mechanic would set an engine when tearing into it.
Rich Harris
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:411A98CA.C9AB022B@***.net...
> That's got to be it, especially since Harris, seemed more concerned
> about number one tight, than the others.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Mike Romain wrote:
> >
> > No.
> >
> > You have 2 TDC's. One has the valves closed, one has them both open.
> > Check the distributor's position.
> >
> > Mike
where any good mechanic would set an engine when tearing into it.
Rich Harris
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:411A98CA.C9AB022B@***.net...
> That's got to be it, especially since Harris, seemed more concerned
> about number one tight, than the others.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Mike Romain wrote:
> >
> > No.
> >
> > You have 2 TDC's. One has the valves closed, one has them both open.
> > Check the distributor's position.
> >
> > Mike
#62
Guest
Posts: n/a
Re: Help! doing the 4.0 head swap on a 258!
You didn't seem to want to take our suggestion about opening the
distributor cap as a second opinion on TDC just to make sure seriously,
so forgive our double check advice.
It really sounds like you are reading the exhaust/intake stroke instead
of the compression stroke all across.
Something silly is wrong and putting strange lifters in isn't likely to
fix it.
Mike
Harris Family wrote:
>
> I know how to go to TDC. I just used #1 as an example. Give me an ounce of
> credit here guys. All cylinders are wrong. The head must have been
> resurfaced as well as the block. I went down to Crower this afternoon and
> they gave me an adjustable pushrod and a Mechanical lifter. I'm going that
> route. Unless you guys can give me a viable alternative.
> Rich Harris.
> PS I've rebuilt a bunch of engines but never had to resize pushrods for a
> hydraulic cam.....always a first time....I'm going back to GM small blocks
> where you can mechanically adjust.
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:411A67B3.83A0E781@sympatico.ca...
> > You use the 4.2 ones.
> >
> > Mike
> >
> > CRWLR wrote:
> > >
> > > Spin the crank one full rotation.
> > >
> > > the crank goes around twice for every rotation of the cam, so the crank
> can
> > > be at the top on one rotation, and the valves are in transition between
> > > exhaust open and intake open. You would have troubles putting the
> pushrods
> > > in if this were the case.
> > >
> > > Having said that, the rockers and pushrods on the 4.0 could easily be
> > > different than on the 4.2.
> > >
> > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > news:xLoSc.1431$aB1.1397@twister.socal.rr.com...
> > > > The distributor position is irrelevant in this case. The valves are
> open
> > > > because either the pushrods are too long or the rockers are of an
> > > incorrect
> > > > design for this head. I never removed the distributor during this
> whole
> > > > operation. All I did was pull the old head and bolt on the new.
> > > > "Jo Bo" <jromas@columbus.rr.com> wrote in message
> > > > news:08mSc.11877$Nl1.1300@fe1.columbus.rr.com...
> > > > > Maybe a dumb question but have you checked the position of the
> > > distributor
> > > > > rotor for pointing to #1 cylinder? If not try turning the crank 360
> > > > degrees.
> > > > >
> > > > > JoBo
> > > > >
> > > > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > > > news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > > > > > Folks, I'm in a pickle!
> > > > > > Hope you can help me. I'm in the process of doing the head swap on
> my
> > > > '86
> > > > > > CJ7. Got the head installed no problem. Here's my catch, when I
> went
> > > to
> > > > put
> > > > > > the 258 stock rockers and pushrods back in, my valves were opened
> on
> > > #1
> > > > cyl
> > > > > > when its at TDC. AS we all know this is not good for compression.
> > > > Apparently
> > > > > > either my pushrods are too long or something in the rockers is
> amiss.
> > > > Got
> > > > > > any ideas? Should I be using 4.0l rockers, pivot assemblies, and
> > > > pushrods
> > > > > > instead of the old 258 engine parts?
> > > > > > Thanks for your help.
> > > > > > Rich Harris
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > >
> > > >
distributor cap as a second opinion on TDC just to make sure seriously,
so forgive our double check advice.
It really sounds like you are reading the exhaust/intake stroke instead
of the compression stroke all across.
Something silly is wrong and putting strange lifters in isn't likely to
fix it.
Mike
Harris Family wrote:
>
> I know how to go to TDC. I just used #1 as an example. Give me an ounce of
> credit here guys. All cylinders are wrong. The head must have been
> resurfaced as well as the block. I went down to Crower this afternoon and
> they gave me an adjustable pushrod and a Mechanical lifter. I'm going that
> route. Unless you guys can give me a viable alternative.
> Rich Harris.
> PS I've rebuilt a bunch of engines but never had to resize pushrods for a
> hydraulic cam.....always a first time....I'm going back to GM small blocks
> where you can mechanically adjust.
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:411A67B3.83A0E781@sympatico.ca...
> > You use the 4.2 ones.
> >
> > Mike
> >
> > CRWLR wrote:
> > >
> > > Spin the crank one full rotation.
> > >
> > > the crank goes around twice for every rotation of the cam, so the crank
> can
> > > be at the top on one rotation, and the valves are in transition between
> > > exhaust open and intake open. You would have troubles putting the
> pushrods
> > > in if this were the case.
> > >
> > > Having said that, the rockers and pushrods on the 4.0 could easily be
> > > different than on the 4.2.
> > >
> > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > news:xLoSc.1431$aB1.1397@twister.socal.rr.com...
> > > > The distributor position is irrelevant in this case. The valves are
> open
> > > > because either the pushrods are too long or the rockers are of an
> > > incorrect
> > > > design for this head. I never removed the distributor during this
> whole
> > > > operation. All I did was pull the old head and bolt on the new.
> > > > "Jo Bo" <jromas@columbus.rr.com> wrote in message
> > > > news:08mSc.11877$Nl1.1300@fe1.columbus.rr.com...
> > > > > Maybe a dumb question but have you checked the position of the
> > > distributor
> > > > > rotor for pointing to #1 cylinder? If not try turning the crank 360
> > > > degrees.
> > > > >
> > > > > JoBo
> > > > >
> > > > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > > > news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > > > > > Folks, I'm in a pickle!
> > > > > > Hope you can help me. I'm in the process of doing the head swap on
> my
> > > > '86
> > > > > > CJ7. Got the head installed no problem. Here's my catch, when I
> went
> > > to
> > > > put
> > > > > > the 258 stock rockers and pushrods back in, my valves were opened
> on
> > > #1
> > > > cyl
> > > > > > when its at TDC. AS we all know this is not good for compression.
> > > > Apparently
> > > > > > either my pushrods are too long or something in the rockers is
> amiss.
> > > > Got
> > > > > > any ideas? Should I be using 4.0l rockers, pivot assemblies, and
> > > > pushrods
> > > > > > instead of the old 258 engine parts?
> > > > > > Thanks for your help.
> > > > > > Rich Harris
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > >
> > > >
#63
Guest
Posts: n/a
Re: Help! doing the 4.0 head swap on a 258!
You didn't seem to want to take our suggestion about opening the
distributor cap as a second opinion on TDC just to make sure seriously,
so forgive our double check advice.
It really sounds like you are reading the exhaust/intake stroke instead
of the compression stroke all across.
Something silly is wrong and putting strange lifters in isn't likely to
fix it.
Mike
Harris Family wrote:
>
> I know how to go to TDC. I just used #1 as an example. Give me an ounce of
> credit here guys. All cylinders are wrong. The head must have been
> resurfaced as well as the block. I went down to Crower this afternoon and
> they gave me an adjustable pushrod and a Mechanical lifter. I'm going that
> route. Unless you guys can give me a viable alternative.
> Rich Harris.
> PS I've rebuilt a bunch of engines but never had to resize pushrods for a
> hydraulic cam.....always a first time....I'm going back to GM small blocks
> where you can mechanically adjust.
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:411A67B3.83A0E781@sympatico.ca...
> > You use the 4.2 ones.
> >
> > Mike
> >
> > CRWLR wrote:
> > >
> > > Spin the crank one full rotation.
> > >
> > > the crank goes around twice for every rotation of the cam, so the crank
> can
> > > be at the top on one rotation, and the valves are in transition between
> > > exhaust open and intake open. You would have troubles putting the
> pushrods
> > > in if this were the case.
> > >
> > > Having said that, the rockers and pushrods on the 4.0 could easily be
> > > different than on the 4.2.
> > >
> > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > news:xLoSc.1431$aB1.1397@twister.socal.rr.com...
> > > > The distributor position is irrelevant in this case. The valves are
> open
> > > > because either the pushrods are too long or the rockers are of an
> > > incorrect
> > > > design for this head. I never removed the distributor during this
> whole
> > > > operation. All I did was pull the old head and bolt on the new.
> > > > "Jo Bo" <jromas@columbus.rr.com> wrote in message
> > > > news:08mSc.11877$Nl1.1300@fe1.columbus.rr.com...
> > > > > Maybe a dumb question but have you checked the position of the
> > > distributor
> > > > > rotor for pointing to #1 cylinder? If not try turning the crank 360
> > > > degrees.
> > > > >
> > > > > JoBo
> > > > >
> > > > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > > > news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > > > > > Folks, I'm in a pickle!
> > > > > > Hope you can help me. I'm in the process of doing the head swap on
> my
> > > > '86
> > > > > > CJ7. Got the head installed no problem. Here's my catch, when I
> went
> > > to
> > > > put
> > > > > > the 258 stock rockers and pushrods back in, my valves were opened
> on
> > > #1
> > > > cyl
> > > > > > when its at TDC. AS we all know this is not good for compression.
> > > > Apparently
> > > > > > either my pushrods are too long or something in the rockers is
> amiss.
> > > > Got
> > > > > > any ideas? Should I be using 4.0l rockers, pivot assemblies, and
> > > > pushrods
> > > > > > instead of the old 258 engine parts?
> > > > > > Thanks for your help.
> > > > > > Rich Harris
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > >
> > > >
distributor cap as a second opinion on TDC just to make sure seriously,
so forgive our double check advice.
It really sounds like you are reading the exhaust/intake stroke instead
of the compression stroke all across.
Something silly is wrong and putting strange lifters in isn't likely to
fix it.
Mike
Harris Family wrote:
>
> I know how to go to TDC. I just used #1 as an example. Give me an ounce of
> credit here guys. All cylinders are wrong. The head must have been
> resurfaced as well as the block. I went down to Crower this afternoon and
> they gave me an adjustable pushrod and a Mechanical lifter. I'm going that
> route. Unless you guys can give me a viable alternative.
> Rich Harris.
> PS I've rebuilt a bunch of engines but never had to resize pushrods for a
> hydraulic cam.....always a first time....I'm going back to GM small blocks
> where you can mechanically adjust.
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:411A67B3.83A0E781@sympatico.ca...
> > You use the 4.2 ones.
> >
> > Mike
> >
> > CRWLR wrote:
> > >
> > > Spin the crank one full rotation.
> > >
> > > the crank goes around twice for every rotation of the cam, so the crank
> can
> > > be at the top on one rotation, and the valves are in transition between
> > > exhaust open and intake open. You would have troubles putting the
> pushrods
> > > in if this were the case.
> > >
> > > Having said that, the rockers and pushrods on the 4.0 could easily be
> > > different than on the 4.2.
> > >
> > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > news:xLoSc.1431$aB1.1397@twister.socal.rr.com...
> > > > The distributor position is irrelevant in this case. The valves are
> open
> > > > because either the pushrods are too long or the rockers are of an
> > > incorrect
> > > > design for this head. I never removed the distributor during this
> whole
> > > > operation. All I did was pull the old head and bolt on the new.
> > > > "Jo Bo" <jromas@columbus.rr.com> wrote in message
> > > > news:08mSc.11877$Nl1.1300@fe1.columbus.rr.com...
> > > > > Maybe a dumb question but have you checked the position of the
> > > distributor
> > > > > rotor for pointing to #1 cylinder? If not try turning the crank 360
> > > > degrees.
> > > > >
> > > > > JoBo
> > > > >
> > > > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > > > news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > > > > > Folks, I'm in a pickle!
> > > > > > Hope you can help me. I'm in the process of doing the head swap on
> my
> > > > '86
> > > > > > CJ7. Got the head installed no problem. Here's my catch, when I
> went
> > > to
> > > > put
> > > > > > the 258 stock rockers and pushrods back in, my valves were opened
> on
> > > #1
> > > > cyl
> > > > > > when its at TDC. AS we all know this is not good for compression.
> > > > Apparently
> > > > > > either my pushrods are too long or something in the rockers is
> amiss.
> > > > Got
> > > > > > any ideas? Should I be using 4.0l rockers, pivot assemblies, and
> > > > pushrods
> > > > > > instead of the old 258 engine parts?
> > > > > > Thanks for your help.
> > > > > > Rich Harris
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > >
> > > >
#64
Guest
Posts: n/a
Re: Help! doing the 4.0 head swap on a 258!
You didn't seem to want to take our suggestion about opening the
distributor cap as a second opinion on TDC just to make sure seriously,
so forgive our double check advice.
It really sounds like you are reading the exhaust/intake stroke instead
of the compression stroke all across.
Something silly is wrong and putting strange lifters in isn't likely to
fix it.
Mike
Harris Family wrote:
>
> I know how to go to TDC. I just used #1 as an example. Give me an ounce of
> credit here guys. All cylinders are wrong. The head must have been
> resurfaced as well as the block. I went down to Crower this afternoon and
> they gave me an adjustable pushrod and a Mechanical lifter. I'm going that
> route. Unless you guys can give me a viable alternative.
> Rich Harris.
> PS I've rebuilt a bunch of engines but never had to resize pushrods for a
> hydraulic cam.....always a first time....I'm going back to GM small blocks
> where you can mechanically adjust.
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:411A67B3.83A0E781@sympatico.ca...
> > You use the 4.2 ones.
> >
> > Mike
> >
> > CRWLR wrote:
> > >
> > > Spin the crank one full rotation.
> > >
> > > the crank goes around twice for every rotation of the cam, so the crank
> can
> > > be at the top on one rotation, and the valves are in transition between
> > > exhaust open and intake open. You would have troubles putting the
> pushrods
> > > in if this were the case.
> > >
> > > Having said that, the rockers and pushrods on the 4.0 could easily be
> > > different than on the 4.2.
> > >
> > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > news:xLoSc.1431$aB1.1397@twister.socal.rr.com...
> > > > The distributor position is irrelevant in this case. The valves are
> open
> > > > because either the pushrods are too long or the rockers are of an
> > > incorrect
> > > > design for this head. I never removed the distributor during this
> whole
> > > > operation. All I did was pull the old head and bolt on the new.
> > > > "Jo Bo" <jromas@columbus.rr.com> wrote in message
> > > > news:08mSc.11877$Nl1.1300@fe1.columbus.rr.com...
> > > > > Maybe a dumb question but have you checked the position of the
> > > distributor
> > > > > rotor for pointing to #1 cylinder? If not try turning the crank 360
> > > > degrees.
> > > > >
> > > > > JoBo
> > > > >
> > > > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > > > news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > > > > > Folks, I'm in a pickle!
> > > > > > Hope you can help me. I'm in the process of doing the head swap on
> my
> > > > '86
> > > > > > CJ7. Got the head installed no problem. Here's my catch, when I
> went
> > > to
> > > > put
> > > > > > the 258 stock rockers and pushrods back in, my valves were opened
> on
> > > #1
> > > > cyl
> > > > > > when its at TDC. AS we all know this is not good for compression.
> > > > Apparently
> > > > > > either my pushrods are too long or something in the rockers is
> amiss.
> > > > Got
> > > > > > any ideas? Should I be using 4.0l rockers, pivot assemblies, and
> > > > pushrods
> > > > > > instead of the old 258 engine parts?
> > > > > > Thanks for your help.
> > > > > > Rich Harris
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > >
> > > >
distributor cap as a second opinion on TDC just to make sure seriously,
so forgive our double check advice.
It really sounds like you are reading the exhaust/intake stroke instead
of the compression stroke all across.
Something silly is wrong and putting strange lifters in isn't likely to
fix it.
Mike
Harris Family wrote:
>
> I know how to go to TDC. I just used #1 as an example. Give me an ounce of
> credit here guys. All cylinders are wrong. The head must have been
> resurfaced as well as the block. I went down to Crower this afternoon and
> they gave me an adjustable pushrod and a Mechanical lifter. I'm going that
> route. Unless you guys can give me a viable alternative.
> Rich Harris.
> PS I've rebuilt a bunch of engines but never had to resize pushrods for a
> hydraulic cam.....always a first time....I'm going back to GM small blocks
> where you can mechanically adjust.
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:411A67B3.83A0E781@sympatico.ca...
> > You use the 4.2 ones.
> >
> > Mike
> >
> > CRWLR wrote:
> > >
> > > Spin the crank one full rotation.
> > >
> > > the crank goes around twice for every rotation of the cam, so the crank
> can
> > > be at the top on one rotation, and the valves are in transition between
> > > exhaust open and intake open. You would have troubles putting the
> pushrods
> > > in if this were the case.
> > >
> > > Having said that, the rockers and pushrods on the 4.0 could easily be
> > > different than on the 4.2.
> > >
> > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > news:xLoSc.1431$aB1.1397@twister.socal.rr.com...
> > > > The distributor position is irrelevant in this case. The valves are
> open
> > > > because either the pushrods are too long or the rockers are of an
> > > incorrect
> > > > design for this head. I never removed the distributor during this
> whole
> > > > operation. All I did was pull the old head and bolt on the new.
> > > > "Jo Bo" <jromas@columbus.rr.com> wrote in message
> > > > news:08mSc.11877$Nl1.1300@fe1.columbus.rr.com...
> > > > > Maybe a dumb question but have you checked the position of the
> > > distributor
> > > > > rotor for pointing to #1 cylinder? If not try turning the crank 360
> > > > degrees.
> > > > >
> > > > > JoBo
> > > > >
> > > > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > > > news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > > > > > Folks, I'm in a pickle!
> > > > > > Hope you can help me. I'm in the process of doing the head swap on
> my
> > > > '86
> > > > > > CJ7. Got the head installed no problem. Here's my catch, when I
> went
> > > to
> > > > put
> > > > > > the 258 stock rockers and pushrods back in, my valves were opened
> on
> > > #1
> > > > cyl
> > > > > > when its at TDC. AS we all know this is not good for compression.
> > > > Apparently
> > > > > > either my pushrods are too long or something in the rockers is
> amiss.
> > > > Got
> > > > > > any ideas? Should I be using 4.0l rockers, pivot assemblies, and
> > > > pushrods
> > > > > > instead of the old 258 engine parts?
> > > > > > Thanks for your help.
> > > > > > Rich Harris
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > >
> > > >
#65
Guest
Posts: n/a
Re: Help! doing the 4.0 head swap on a 258!
You didn't seem to want to take our suggestion about opening the
distributor cap as a second opinion on TDC just to make sure seriously,
so forgive our double check advice.
It really sounds like you are reading the exhaust/intake stroke instead
of the compression stroke all across.
Something silly is wrong and putting strange lifters in isn't likely to
fix it.
Mike
Harris Family wrote:
>
> I know how to go to TDC. I just used #1 as an example. Give me an ounce of
> credit here guys. All cylinders are wrong. The head must have been
> resurfaced as well as the block. I went down to Crower this afternoon and
> they gave me an adjustable pushrod and a Mechanical lifter. I'm going that
> route. Unless you guys can give me a viable alternative.
> Rich Harris.
> PS I've rebuilt a bunch of engines but never had to resize pushrods for a
> hydraulic cam.....always a first time....I'm going back to GM small blocks
> where you can mechanically adjust.
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:411A67B3.83A0E781@sympatico.ca...
> > You use the 4.2 ones.
> >
> > Mike
> >
> > CRWLR wrote:
> > >
> > > Spin the crank one full rotation.
> > >
> > > the crank goes around twice for every rotation of the cam, so the crank
> can
> > > be at the top on one rotation, and the valves are in transition between
> > > exhaust open and intake open. You would have troubles putting the
> pushrods
> > > in if this were the case.
> > >
> > > Having said that, the rockers and pushrods on the 4.0 could easily be
> > > different than on the 4.2.
> > >
> > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > news:xLoSc.1431$aB1.1397@twister.socal.rr.com...
> > > > The distributor position is irrelevant in this case. The valves are
> open
> > > > because either the pushrods are too long or the rockers are of an
> > > incorrect
> > > > design for this head. I never removed the distributor during this
> whole
> > > > operation. All I did was pull the old head and bolt on the new.
> > > > "Jo Bo" <jromas@columbus.rr.com> wrote in message
> > > > news:08mSc.11877$Nl1.1300@fe1.columbus.rr.com...
> > > > > Maybe a dumb question but have you checked the position of the
> > > distributor
> > > > > rotor for pointing to #1 cylinder? If not try turning the crank 360
> > > > degrees.
> > > > >
> > > > > JoBo
> > > > >
> > > > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > > > news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > > > > > Folks, I'm in a pickle!
> > > > > > Hope you can help me. I'm in the process of doing the head swap on
> my
> > > > '86
> > > > > > CJ7. Got the head installed no problem. Here's my catch, when I
> went
> > > to
> > > > put
> > > > > > the 258 stock rockers and pushrods back in, my valves were opened
> on
> > > #1
> > > > cyl
> > > > > > when its at TDC. AS we all know this is not good for compression.
> > > > Apparently
> > > > > > either my pushrods are too long or something in the rockers is
> amiss.
> > > > Got
> > > > > > any ideas? Should I be using 4.0l rockers, pivot assemblies, and
> > > > pushrods
> > > > > > instead of the old 258 engine parts?
> > > > > > Thanks for your help.
> > > > > > Rich Harris
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > >
> > > >
distributor cap as a second opinion on TDC just to make sure seriously,
so forgive our double check advice.
It really sounds like you are reading the exhaust/intake stroke instead
of the compression stroke all across.
Something silly is wrong and putting strange lifters in isn't likely to
fix it.
Mike
Harris Family wrote:
>
> I know how to go to TDC. I just used #1 as an example. Give me an ounce of
> credit here guys. All cylinders are wrong. The head must have been
> resurfaced as well as the block. I went down to Crower this afternoon and
> they gave me an adjustable pushrod and a Mechanical lifter. I'm going that
> route. Unless you guys can give me a viable alternative.
> Rich Harris.
> PS I've rebuilt a bunch of engines but never had to resize pushrods for a
> hydraulic cam.....always a first time....I'm going back to GM small blocks
> where you can mechanically adjust.
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:411A67B3.83A0E781@sympatico.ca...
> > You use the 4.2 ones.
> >
> > Mike
> >
> > CRWLR wrote:
> > >
> > > Spin the crank one full rotation.
> > >
> > > the crank goes around twice for every rotation of the cam, so the crank
> can
> > > be at the top on one rotation, and the valves are in transition between
> > > exhaust open and intake open. You would have troubles putting the
> pushrods
> > > in if this were the case.
> > >
> > > Having said that, the rockers and pushrods on the 4.0 could easily be
> > > different than on the 4.2.
> > >
> > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > news:xLoSc.1431$aB1.1397@twister.socal.rr.com...
> > > > The distributor position is irrelevant in this case. The valves are
> open
> > > > because either the pushrods are too long or the rockers are of an
> > > incorrect
> > > > design for this head. I never removed the distributor during this
> whole
> > > > operation. All I did was pull the old head and bolt on the new.
> > > > "Jo Bo" <jromas@columbus.rr.com> wrote in message
> > > > news:08mSc.11877$Nl1.1300@fe1.columbus.rr.com...
> > > > > Maybe a dumb question but have you checked the position of the
> > > distributor
> > > > > rotor for pointing to #1 cylinder? If not try turning the crank 360
> > > > degrees.
> > > > >
> > > > > JoBo
> > > > >
> > > > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > > > news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > > > > > Folks, I'm in a pickle!
> > > > > > Hope you can help me. I'm in the process of doing the head swap on
> my
> > > > '86
> > > > > > CJ7. Got the head installed no problem. Here's my catch, when I
> went
> > > to
> > > > put
> > > > > > the 258 stock rockers and pushrods back in, my valves were opened
> on
> > > #1
> > > > cyl
> > > > > > when its at TDC. AS we all know this is not good for compression.
> > > > Apparently
> > > > > > either my pushrods are too long or something in the rockers is
> amiss.
> > > > Got
> > > > > > any ideas? Should I be using 4.0l rockers, pivot assemblies, and
> > > > pushrods
> > > > > > instead of the old 258 engine parts?
> > > > > > Thanks for your help.
> > > > > > Rich Harris
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > >
> > > >
#66
Guest
Posts: n/a
Re: Help! doing the 4.0 head swap on a 258!
How can you do it with the distributor cap in place?
Mike
Harris Family wrote:
>
> Comon Mike.... Give me credit for at least knowing how to dothis...
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:411A1DE7.2A5B6A73@sympatico.ca...
> > No.
> >
> > You have 2 TDC's. One has the valves closed, one has them both open.
> > Check the distributor's position.
> >
> > Mike
> >
> > Harris Family wrote:
> > >
> > > The distributor position is irrelevant in this case. The valves are open
> > > because either the pushrods are too long or the rockers are of an
> incorrect
> > > design for this head. I never removed the distributor during this whole
> > > operation. All I did was pull the old head and bolt on the new.
> > > "Jo Bo" <jromas@columbus.rr.com> wrote in message
> > > news:08mSc.11877$Nl1.1300@fe1.columbus.rr.com...
> > > > Maybe a dumb question but have you checked the position of the
> distributor
> > > > rotor for pointing to #1 cylinder? If not try turning the crank 360
> > > degrees.
> > > >
> > > > JoBo
> > > >
> > > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > > news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > > > > Folks, I'm in a pickle!
> > > > > Hope you can help me. I'm in the process of doing the head swap on
> my
> > > '86
> > > > > CJ7. Got the head installed no problem. Here's my catch, when I went
> to
> > > put
> > > > > the 258 stock rockers and pushrods back in, my valves were opened on
> #1
> > > cyl
> > > > > when its at TDC. AS we all know this is not good for compression.
> > > Apparently
> > > > > either my pushrods are too long or something in the rockers is
> amiss.
> > > Got
> > > > > any ideas? Should I be using 4.0l rockers, pivot assemblies, and
> > > pushrods
> > > > > instead of the old 258 engine parts?
> > > > > Thanks for your help.
> > > > > Rich Harris
> > > > >
> > > > >
> > > >
> > > >
Mike
Harris Family wrote:
>
> Comon Mike.... Give me credit for at least knowing how to dothis...
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:411A1DE7.2A5B6A73@sympatico.ca...
> > No.
> >
> > You have 2 TDC's. One has the valves closed, one has them both open.
> > Check the distributor's position.
> >
> > Mike
> >
> > Harris Family wrote:
> > >
> > > The distributor position is irrelevant in this case. The valves are open
> > > because either the pushrods are too long or the rockers are of an
> incorrect
> > > design for this head. I never removed the distributor during this whole
> > > operation. All I did was pull the old head and bolt on the new.
> > > "Jo Bo" <jromas@columbus.rr.com> wrote in message
> > > news:08mSc.11877$Nl1.1300@fe1.columbus.rr.com...
> > > > Maybe a dumb question but have you checked the position of the
> distributor
> > > > rotor for pointing to #1 cylinder? If not try turning the crank 360
> > > degrees.
> > > >
> > > > JoBo
> > > >
> > > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > > news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > > > > Folks, I'm in a pickle!
> > > > > Hope you can help me. I'm in the process of doing the head swap on
> my
> > > '86
> > > > > CJ7. Got the head installed no problem. Here's my catch, when I went
> to
> > > put
> > > > > the 258 stock rockers and pushrods back in, my valves were opened on
> #1
> > > cyl
> > > > > when its at TDC. AS we all know this is not good for compression.
> > > Apparently
> > > > > either my pushrods are too long or something in the rockers is
> amiss.
> > > Got
> > > > > any ideas? Should I be using 4.0l rockers, pivot assemblies, and
> > > pushrods
> > > > > instead of the old 258 engine parts?
> > > > > Thanks for your help.
> > > > > Rich Harris
> > > > >
> > > > >
> > > >
> > > >
#67
Guest
Posts: n/a
Re: Help! doing the 4.0 head swap on a 258!
How can you do it with the distributor cap in place?
Mike
Harris Family wrote:
>
> Comon Mike.... Give me credit for at least knowing how to dothis...
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:411A1DE7.2A5B6A73@sympatico.ca...
> > No.
> >
> > You have 2 TDC's. One has the valves closed, one has them both open.
> > Check the distributor's position.
> >
> > Mike
> >
> > Harris Family wrote:
> > >
> > > The distributor position is irrelevant in this case. The valves are open
> > > because either the pushrods are too long or the rockers are of an
> incorrect
> > > design for this head. I never removed the distributor during this whole
> > > operation. All I did was pull the old head and bolt on the new.
> > > "Jo Bo" <jromas@columbus.rr.com> wrote in message
> > > news:08mSc.11877$Nl1.1300@fe1.columbus.rr.com...
> > > > Maybe a dumb question but have you checked the position of the
> distributor
> > > > rotor for pointing to #1 cylinder? If not try turning the crank 360
> > > degrees.
> > > >
> > > > JoBo
> > > >
> > > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > > news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > > > > Folks, I'm in a pickle!
> > > > > Hope you can help me. I'm in the process of doing the head swap on
> my
> > > '86
> > > > > CJ7. Got the head installed no problem. Here's my catch, when I went
> to
> > > put
> > > > > the 258 stock rockers and pushrods back in, my valves were opened on
> #1
> > > cyl
> > > > > when its at TDC. AS we all know this is not good for compression.
> > > Apparently
> > > > > either my pushrods are too long or something in the rockers is
> amiss.
> > > Got
> > > > > any ideas? Should I be using 4.0l rockers, pivot assemblies, and
> > > pushrods
> > > > > instead of the old 258 engine parts?
> > > > > Thanks for your help.
> > > > > Rich Harris
> > > > >
> > > > >
> > > >
> > > >
Mike
Harris Family wrote:
>
> Comon Mike.... Give me credit for at least knowing how to dothis...
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:411A1DE7.2A5B6A73@sympatico.ca...
> > No.
> >
> > You have 2 TDC's. One has the valves closed, one has them both open.
> > Check the distributor's position.
> >
> > Mike
> >
> > Harris Family wrote:
> > >
> > > The distributor position is irrelevant in this case. The valves are open
> > > because either the pushrods are too long or the rockers are of an
> incorrect
> > > design for this head. I never removed the distributor during this whole
> > > operation. All I did was pull the old head and bolt on the new.
> > > "Jo Bo" <jromas@columbus.rr.com> wrote in message
> > > news:08mSc.11877$Nl1.1300@fe1.columbus.rr.com...
> > > > Maybe a dumb question but have you checked the position of the
> distributor
> > > > rotor for pointing to #1 cylinder? If not try turning the crank 360
> > > degrees.
> > > >
> > > > JoBo
> > > >
> > > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > > news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > > > > Folks, I'm in a pickle!
> > > > > Hope you can help me. I'm in the process of doing the head swap on
> my
> > > '86
> > > > > CJ7. Got the head installed no problem. Here's my catch, when I went
> to
> > > put
> > > > > the 258 stock rockers and pushrods back in, my valves were opened on
> #1
> > > cyl
> > > > > when its at TDC. AS we all know this is not good for compression.
> > > Apparently
> > > > > either my pushrods are too long or something in the rockers is
> amiss.
> > > Got
> > > > > any ideas? Should I be using 4.0l rockers, pivot assemblies, and
> > > pushrods
> > > > > instead of the old 258 engine parts?
> > > > > Thanks for your help.
> > > > > Rich Harris
> > > > >
> > > > >
> > > >
> > > >
#68
Guest
Posts: n/a
Re: Help! doing the 4.0 head swap on a 258!
How can you do it with the distributor cap in place?
Mike
Harris Family wrote:
>
> Comon Mike.... Give me credit for at least knowing how to dothis...
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:411A1DE7.2A5B6A73@sympatico.ca...
> > No.
> >
> > You have 2 TDC's. One has the valves closed, one has them both open.
> > Check the distributor's position.
> >
> > Mike
> >
> > Harris Family wrote:
> > >
> > > The distributor position is irrelevant in this case. The valves are open
> > > because either the pushrods are too long or the rockers are of an
> incorrect
> > > design for this head. I never removed the distributor during this whole
> > > operation. All I did was pull the old head and bolt on the new.
> > > "Jo Bo" <jromas@columbus.rr.com> wrote in message
> > > news:08mSc.11877$Nl1.1300@fe1.columbus.rr.com...
> > > > Maybe a dumb question but have you checked the position of the
> distributor
> > > > rotor for pointing to #1 cylinder? If not try turning the crank 360
> > > degrees.
> > > >
> > > > JoBo
> > > >
> > > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > > news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > > > > Folks, I'm in a pickle!
> > > > > Hope you can help me. I'm in the process of doing the head swap on
> my
> > > '86
> > > > > CJ7. Got the head installed no problem. Here's my catch, when I went
> to
> > > put
> > > > > the 258 stock rockers and pushrods back in, my valves were opened on
> #1
> > > cyl
> > > > > when its at TDC. AS we all know this is not good for compression.
> > > Apparently
> > > > > either my pushrods are too long or something in the rockers is
> amiss.
> > > Got
> > > > > any ideas? Should I be using 4.0l rockers, pivot assemblies, and
> > > pushrods
> > > > > instead of the old 258 engine parts?
> > > > > Thanks for your help.
> > > > > Rich Harris
> > > > >
> > > > >
> > > >
> > > >
Mike
Harris Family wrote:
>
> Comon Mike.... Give me credit for at least knowing how to dothis...
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:411A1DE7.2A5B6A73@sympatico.ca...
> > No.
> >
> > You have 2 TDC's. One has the valves closed, one has them both open.
> > Check the distributor's position.
> >
> > Mike
> >
> > Harris Family wrote:
> > >
> > > The distributor position is irrelevant in this case. The valves are open
> > > because either the pushrods are too long or the rockers are of an
> incorrect
> > > design for this head. I never removed the distributor during this whole
> > > operation. All I did was pull the old head and bolt on the new.
> > > "Jo Bo" <jromas@columbus.rr.com> wrote in message
> > > news:08mSc.11877$Nl1.1300@fe1.columbus.rr.com...
> > > > Maybe a dumb question but have you checked the position of the
> distributor
> > > > rotor for pointing to #1 cylinder? If not try turning the crank 360
> > > degrees.
> > > >
> > > > JoBo
> > > >
> > > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > > news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > > > > Folks, I'm in a pickle!
> > > > > Hope you can help me. I'm in the process of doing the head swap on
> my
> > > '86
> > > > > CJ7. Got the head installed no problem. Here's my catch, when I went
> to
> > > put
> > > > > the 258 stock rockers and pushrods back in, my valves were opened on
> #1
> > > cyl
> > > > > when its at TDC. AS we all know this is not good for compression.
> > > Apparently
> > > > > either my pushrods are too long or something in the rockers is
> amiss.
> > > Got
> > > > > any ideas? Should I be using 4.0l rockers, pivot assemblies, and
> > > pushrods
> > > > > instead of the old 258 engine parts?
> > > > > Thanks for your help.
> > > > > Rich Harris
> > > > >
> > > > >
> > > >
> > > >
#69
Guest
Posts: n/a
Re: Help! doing the 4.0 head swap on a 258!
How can you do it with the distributor cap in place?
Mike
Harris Family wrote:
>
> Comon Mike.... Give me credit for at least knowing how to dothis...
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:411A1DE7.2A5B6A73@sympatico.ca...
> > No.
> >
> > You have 2 TDC's. One has the valves closed, one has them both open.
> > Check the distributor's position.
> >
> > Mike
> >
> > Harris Family wrote:
> > >
> > > The distributor position is irrelevant in this case. The valves are open
> > > because either the pushrods are too long or the rockers are of an
> incorrect
> > > design for this head. I never removed the distributor during this whole
> > > operation. All I did was pull the old head and bolt on the new.
> > > "Jo Bo" <jromas@columbus.rr.com> wrote in message
> > > news:08mSc.11877$Nl1.1300@fe1.columbus.rr.com...
> > > > Maybe a dumb question but have you checked the position of the
> distributor
> > > > rotor for pointing to #1 cylinder? If not try turning the crank 360
> > > degrees.
> > > >
> > > > JoBo
> > > >
> > > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > > news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > > > > Folks, I'm in a pickle!
> > > > > Hope you can help me. I'm in the process of doing the head swap on
> my
> > > '86
> > > > > CJ7. Got the head installed no problem. Here's my catch, when I went
> to
> > > put
> > > > > the 258 stock rockers and pushrods back in, my valves were opened on
> #1
> > > cyl
> > > > > when its at TDC. AS we all know this is not good for compression.
> > > Apparently
> > > > > either my pushrods are too long or something in the rockers is
> amiss.
> > > Got
> > > > > any ideas? Should I be using 4.0l rockers, pivot assemblies, and
> > > pushrods
> > > > > instead of the old 258 engine parts?
> > > > > Thanks for your help.
> > > > > Rich Harris
> > > > >
> > > > >
> > > >
> > > >
Mike
Harris Family wrote:
>
> Comon Mike.... Give me credit for at least knowing how to dothis...
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:411A1DE7.2A5B6A73@sympatico.ca...
> > No.
> >
> > You have 2 TDC's. One has the valves closed, one has them both open.
> > Check the distributor's position.
> >
> > Mike
> >
> > Harris Family wrote:
> > >
> > > The distributor position is irrelevant in this case. The valves are open
> > > because either the pushrods are too long or the rockers are of an
> incorrect
> > > design for this head. I never removed the distributor during this whole
> > > operation. All I did was pull the old head and bolt on the new.
> > > "Jo Bo" <jromas@columbus.rr.com> wrote in message
> > > news:08mSc.11877$Nl1.1300@fe1.columbus.rr.com...
> > > > Maybe a dumb question but have you checked the position of the
> distributor
> > > > rotor for pointing to #1 cylinder? If not try turning the crank 360
> > > degrees.
> > > >
> > > > JoBo
> > > >
> > > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > > news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > > > > Folks, I'm in a pickle!
> > > > > Hope you can help me. I'm in the process of doing the head swap on
> my
> > > '86
> > > > > CJ7. Got the head installed no problem. Here's my catch, when I went
> to
> > > put
> > > > > the 258 stock rockers and pushrods back in, my valves were opened on
> #1
> > > cyl
> > > > > when its at TDC. AS we all know this is not good for compression.
> > > Apparently
> > > > > either my pushrods are too long or something in the rockers is
> amiss.
> > > Got
> > > > > any ideas? Should I be using 4.0l rockers, pivot assemblies, and
> > > pushrods
> > > > > instead of the old 258 engine parts?
> > > > > Thanks for your help.
> > > > > Rich Harris
> > > > >
> > > > >
> > > >
> > > >
#70
Guest
Posts: n/a
Re: Help! doing the 4.0 head swap on a 258!
With those lifters and rods in, will the valves close at any point in
the crankshaft's revolution?
Mike
Harris Family wrote:
>
> Comon Mike.... Give me credit for at least knowing how to dothis...
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:411A1DE7.2A5B6A73@sympatico.ca...
> > No.
> >
> > You have 2 TDC's. One has the valves closed, one has them both open.
> > Check the distributor's position.
> >
> > Mike
> >
> > Harris Family wrote:
> > >
> > > The distributor position is irrelevant in this case. The valves are open
> > > because either the pushrods are too long or the rockers are of an
> incorrect
> > > design for this head. I never removed the distributor during this whole
> > > operation. All I did was pull the old head and bolt on the new.
> > > "Jo Bo" <jromas@columbus.rr.com> wrote in message
> > > news:08mSc.11877$Nl1.1300@fe1.columbus.rr.com...
> > > > Maybe a dumb question but have you checked the position of the
> distributor
> > > > rotor for pointing to #1 cylinder? If not try turning the crank 360
> > > degrees.
> > > >
> > > > JoBo
> > > >
> > > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > > news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > > > > Folks, I'm in a pickle!
> > > > > Hope you can help me. I'm in the process of doing the head swap on
> my
> > > '86
> > > > > CJ7. Got the head installed no problem. Here's my catch, when I went
> to
> > > put
> > > > > the 258 stock rockers and pushrods back in, my valves were opened on
> #1
> > > cyl
> > > > > when its at TDC. AS we all know this is not good for compression.
> > > Apparently
> > > > > either my pushrods are too long or something in the rockers is
> amiss.
> > > Got
> > > > > any ideas? Should I be using 4.0l rockers, pivot assemblies, and
> > > pushrods
> > > > > instead of the old 258 engine parts?
> > > > > Thanks for your help.
> > > > > Rich Harris
> > > > >
> > > > >
> > > >
> > > >
the crankshaft's revolution?
Mike
Harris Family wrote:
>
> Comon Mike.... Give me credit for at least knowing how to dothis...
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:411A1DE7.2A5B6A73@sympatico.ca...
> > No.
> >
> > You have 2 TDC's. One has the valves closed, one has them both open.
> > Check the distributor's position.
> >
> > Mike
> >
> > Harris Family wrote:
> > >
> > > The distributor position is irrelevant in this case. The valves are open
> > > because either the pushrods are too long or the rockers are of an
> incorrect
> > > design for this head. I never removed the distributor during this whole
> > > operation. All I did was pull the old head and bolt on the new.
> > > "Jo Bo" <jromas@columbus.rr.com> wrote in message
> > > news:08mSc.11877$Nl1.1300@fe1.columbus.rr.com...
> > > > Maybe a dumb question but have you checked the position of the
> distributor
> > > > rotor for pointing to #1 cylinder? If not try turning the crank 360
> > > degrees.
> > > >
> > > > JoBo
> > > >
> > > > "Harris Family" <SHARRIS11nospam@san.rr.com> wrote in message
> > > > news:gJeSc.3870$Qa4.538@twister.socal.rr.com...
> > > > > Folks, I'm in a pickle!
> > > > > Hope you can help me. I'm in the process of doing the head swap on
> my
> > > '86
> > > > > CJ7. Got the head installed no problem. Here's my catch, when I went
> to
> > > put
> > > > > the 258 stock rockers and pushrods back in, my valves were opened on
> #1
> > > cyl
> > > > > when its at TDC. AS we all know this is not good for compression.
> > > Apparently
> > > > > either my pushrods are too long or something in the rockers is
> amiss.
> > > Got
> > > > > any ideas? Should I be using 4.0l rockers, pivot assemblies, and
> > > pushrods
> > > > > instead of the old 258 engine parts?
> > > > > Thanks for your help.
> > > > > Rich Harris
> > > > >
> > > > >
> > > >
> > > >