93 XJ low compression, what are my options.
 

Took my '93 XJ 4L with 190K miles on into the shop because it was blowing
oil into the air filter and the crankcase ventilation system is working
fine. Mechanic told me the compression was getting low. Come to think of it
it does seem to have lost some power over time, although it's hard to tell.

What would be my best option here? Get a new vehicle? Have a rebuilt engine
put in? Have the present engine fixed? Ignore the problem until it breaks
down?

It's not blowing blue smoke, it leaks a little from the main seal and the
valve cover gasket, and opinions vary on whether the exhaust manifold is
cracked or not. Near as I can tell nothing around the engine has ever been
worked on. Any suggestions what to do are apreciated...

Re: 93 XJ low compression, what are my options.
 

"Compression was getting low" is super vague. There are six compression
readings on that engine and knowing what they are can tell you a lot. If
they are all low and equal, and they come up with a squirt of oil, then
chances are good that you need a ring job. However, bad valve stem seals
can mimic the same symptoms as bad rings, and are a whole lot easier to fix.
One or two low compression readings can mean a need for a valve job, also
cheaper and easier to fix than rings. Try to get your mechanic to say
whether the rings are bad or not. He's the one with access to the vehicle
who can make this determination.

My Suburban was blowing a quart of oil every 300 miles, but no blue smoke.
In fact, I had installed two three quarter inch aftermarket breathers in
each valve cover just to get it out from under the hood. It definitely had
bad rings, so you never know by the blue smoke or not.

Earle

"Monte Castleman" <mdcastleman@earthlink.net> wrote in message
news:YPs2i.10302$Ut6.7011@newsread1.news.pas.earth link.net...
> Took my '93 XJ 4L with 190K miles on into the shop because it was blowing
> oil into the air filter and the crankcase ventilation system is working
> fine. Mechanic told me the compression was getting low. Come to think of
it
> it does seem to have lost some power over time, although it's hard to
tell.
>
> What would be my best option here? Get a new vehicle? Have a rebuilt
engine
> put in? Have the present engine fixed? Ignore the problem until it breaks
> down?
>
> It's not blowing blue smoke, it leaks a little from the main seal and the
> valve cover gasket, and opinions vary on whether the exhaust manifold is
> cracked or not. Near as I can tell nothing around the engine has ever been
> worked on. Any suggestions what to do are apreciated...
>
>

Re: 93 XJ low compression, what are my options.
 

"Compression was getting low" is super vague. There are six compression
readings on that engine and knowing what they are can tell you a lot. If
they are all low and equal, and they come up with a squirt of oil, then
chances are good that you need a ring job. However, bad valve stem seals
can mimic the same symptoms as bad rings, and are a whole lot easier to fix.
One or two low compression readings can mean a need for a valve job, also
cheaper and easier to fix than rings. Try to get your mechanic to say
whether the rings are bad or not. He's the one with access to the vehicle
who can make this determination.

My Suburban was blowing a quart of oil every 300 miles, but no blue smoke.
In fact, I had installed two three quarter inch aftermarket breathers in
each valve cover just to get it out from under the hood. It definitely had
bad rings, so you never know by the blue smoke or not.

Earle

"Monte Castleman" <mdcastleman@earthlink.net> wrote in message
news:YPs2i.10302$Ut6.7011@newsread1.news.pas.earth link.net...
> Took my '93 XJ 4L with 190K miles on into the shop because it was blowing
> oil into the air filter and the crankcase ventilation system is working
> fine. Mechanic told me the compression was getting low. Come to think of
it
> it does seem to have lost some power over time, although it's hard to
tell.
>
> What would be my best option here? Get a new vehicle? Have a rebuilt
engine
> put in? Have the present engine fixed? Ignore the problem until it breaks
> down?
>
> It's not blowing blue smoke, it leaks a little from the main seal and the
> valve cover gasket, and opinions vary on whether the exhaust manifold is
> cracked or not. Near as I can tell nothing around the engine has ever been
> worked on. Any suggestions what to do are apreciated...
>
>

Re: 93 XJ low compression, what are my options.
 

"Compression was getting low" is super vague. There are six compression
readings on that engine and knowing what they are can tell you a lot. If
they are all low and equal, and they come up with a squirt of oil, then
chances are good that you need a ring job. However, bad valve stem seals
can mimic the same symptoms as bad rings, and are a whole lot easier to fix.
One or two low compression readings can mean a need for a valve job, also
cheaper and easier to fix than rings. Try to get your mechanic to say
whether the rings are bad or not. He's the one with access to the vehicle
who can make this determination.

My Suburban was blowing a quart of oil every 300 miles, but no blue smoke.
In fact, I had installed two three quarter inch aftermarket breathers in
each valve cover just to get it out from under the hood. It definitely had
bad rings, so you never know by the blue smoke or not.

Earle

"Monte Castleman" <mdcastleman@earthlink.net> wrote in message
news:YPs2i.10302$Ut6.7011@newsread1.news.pas.earth link.net...
> Took my '93 XJ 4L with 190K miles on into the shop because it was blowing
> oil into the air filter and the crankcase ventilation system is working
> fine. Mechanic told me the compression was getting low. Come to think of
it
> it does seem to have lost some power over time, although it's hard to
tell.
>
> What would be my best option here? Get a new vehicle? Have a rebuilt
engine
> put in? Have the present engine fixed? Ignore the problem until it breaks
> down?
>
> It's not blowing blue smoke, it leaks a little from the main seal and the
> valve cover gasket, and opinions vary on whether the exhaust manifold is
> cracked or not. Near as I can tell nothing around the engine has ever been
> worked on. Any suggestions what to do are apreciated...
>
>

Re: 93 XJ low compression, what are my options.
 

"Compression was getting low" is super vague. There are six compression
readings on that engine and knowing what they are can tell you a lot. If
they are all low and equal, and they come up with a squirt of oil, then
chances are good that you need a ring job. However, bad valve stem seals
can mimic the same symptoms as bad rings, and are a whole lot easier to fix.
One or two low compression readings can mean a need for a valve job, also
cheaper and easier to fix than rings. Try to get your mechanic to say
whether the rings are bad or not. He's the one with access to the vehicle
who can make this determination.

My Suburban was blowing a quart of oil every 300 miles, but no blue smoke.
In fact, I had installed two three quarter inch aftermarket breathers in
each valve cover just to get it out from under the hood. It definitely had
bad rings, so you never know by the blue smoke or not.

Earle

"Monte Castleman" <mdcastleman@earthlink.net> wrote in message
news:YPs2i.10302$Ut6.7011@newsread1.news.pas.earth link.net...
> Took my '93 XJ 4L with 190K miles on into the shop because it was blowing
> oil into the air filter and the crankcase ventilation system is working
> fine. Mechanic told me the compression was getting low. Come to think of
it
> it does seem to have lost some power over time, although it's hard to
tell.
>
> What would be my best option here? Get a new vehicle? Have a rebuilt
engine
> put in? Have the present engine fixed? Ignore the problem until it breaks
> down?
>
> It's not blowing blue smoke, it leaks a little from the main seal and the
> valve cover gasket, and opinions vary on whether the exhaust manifold is
> cracked or not. Near as I can tell nothing around the engine has ever been
> worked on. Any suggestions what to do are apreciated...
>
>

Re: 93 XJ low compression, what are my options.
 

Hi Monte,
Usually just reaming out the orifice that takes the place of a PCV will
fix the oil being blown into the air filter box:
http://jeep.off-road.com/jeep/articl....jsp?id=257985 Converting
it to a Positive Crankcase Ventilation valve is best:
http://home.sprynet.com/~dale02/vac-pcv.htm their should have been a recall
to do that for you. Replacing the valve cover gasket will fix your leak. You
should have another hundred and a half if you've changed the oil regularly,
like my Ford with three hundred and fifty thousand on it, without ever
having the head pulled: http://www.----------.com/temp/smog07.jpg
God Bless America, Bill O|||||||O
mailto:--------------------

"Monte Castleman" <mdcastleman@earthlink.net> wrote in message
news:YPs2i.10302$Ut6.7011@newsread1.news.pas.earth link.net...
> Took my '93 XJ 4L with 190K miles on into the shop because it was blowing
> oil into the air filter and the crankcase ventilation system is working
> fine. Mechanic told me the compression was getting low. Come to think of
it
> it does seem to have lost some power over time, although it's hard to
tell.
>
> What would be my best option here? Get a new vehicle? Have a rebuilt
engine
> put in? Have the present engine fixed? Ignore the problem until it breaks
> down?
>
> It's not blowing blue smoke, it leaks a little from the main seal and the
> valve cover gasket, and opinions vary on whether the exhaust manifold is
> cracked or not. Near as I can tell nothing around the engine has ever been
> worked on. Any suggestions what to do are apreciated...
>
>



--
Posted via a free Usenet account from http://www.teranews.com

Re: 93 XJ low compression, what are my options.
 

Hi Monte,
Usually just reaming out the orifice that takes the place of a PCV will
fix the oil being blown into the air filter box:
http://jeep.off-road.com/jeep/articl....jsp?id=257985 Converting
it to a Positive Crankcase Ventilation valve is best:
http://home.sprynet.com/~dale02/vac-pcv.htm their should have been a recall
to do that for you. Replacing the valve cover gasket will fix your leak. You
should have another hundred and a half if you've changed the oil regularly,
like my Ford with three hundred and fifty thousand on it, without ever
having the head pulled: http://www.----------.com/temp/smog07.jpg
God Bless America, Bill O|||||||O
mailto:--------------------

"Monte Castleman" <mdcastleman@earthlink.net> wrote in message
news:YPs2i.10302$Ut6.7011@newsread1.news.pas.earth link.net...
> Took my '93 XJ 4L with 190K miles on into the shop because it was blowing
> oil into the air filter and the crankcase ventilation system is working
> fine. Mechanic told me the compression was getting low. Come to think of
it
> it does seem to have lost some power over time, although it's hard to
tell.
>
> What would be my best option here? Get a new vehicle? Have a rebuilt
engine
> put in? Have the present engine fixed? Ignore the problem until it breaks
> down?
>
> It's not blowing blue smoke, it leaks a little from the main seal and the
> valve cover gasket, and opinions vary on whether the exhaust manifold is
> cracked or not. Near as I can tell nothing around the engine has ever been
> worked on. Any suggestions what to do are apreciated...
>
>



--
Posted via a free Usenet account from http://www.teranews.com

Re: 93 XJ low compression, what are my options.
 

Hi Monte,
Usually just reaming out the orifice that takes the place of a PCV will
fix the oil being blown into the air filter box:
http://jeep.off-road.com/jeep/articl....jsp?id=257985 Converting
it to a Positive Crankcase Ventilation valve is best:
http://home.sprynet.com/~dale02/vac-pcv.htm their should have been a recall
to do that for you. Replacing the valve cover gasket will fix your leak. You
should have another hundred and a half if you've changed the oil regularly,
like my Ford with three hundred and fifty thousand on it, without ever
having the head pulled: http://www.----------.com/temp/smog07.jpg
God Bless America, Bill O|||||||O
mailto:--------------------

"Monte Castleman" <mdcastleman@earthlink.net> wrote in message
news:YPs2i.10302$Ut6.7011@newsread1.news.pas.earth link.net...
> Took my '93 XJ 4L with 190K miles on into the shop because it was blowing
> oil into the air filter and the crankcase ventilation system is working
> fine. Mechanic told me the compression was getting low. Come to think of
it
> it does seem to have lost some power over time, although it's hard to
tell.
>
> What would be my best option here? Get a new vehicle? Have a rebuilt
engine
> put in? Have the present engine fixed? Ignore the problem until it breaks
> down?
>
> It's not blowing blue smoke, it leaks a little from the main seal and the
> valve cover gasket, and opinions vary on whether the exhaust manifold is
> cracked or not. Near as I can tell nothing around the engine has ever been
> worked on. Any suggestions what to do are apreciated...
>
>



--
Posted via a free Usenet account from http://www.teranews.com

Re: 93 XJ low compression, what are my options.
 

Hi Monte,
Usually just reaming out the orifice that takes the place of a PCV will
fix the oil being blown into the air filter box:
http://jeep.off-road.com/jeep/articl....jsp?id=257985 Converting
it to a Positive Crankcase Ventilation valve is best:
http://home.sprynet.com/~dale02/vac-pcv.htm their should have been a recall
to do that for you. Replacing the valve cover gasket will fix your leak. You
should have another hundred and a half if you've changed the oil regularly,
like my Ford with three hundred and fifty thousand on it, without ever
having the head pulled: http://www.----------.com/temp/smog07.jpg
God Bless America, Bill O|||||||O
mailto:--------------------

"Monte Castleman" <mdcastleman@earthlink.net> wrote in message
news:YPs2i.10302$Ut6.7011@newsread1.news.pas.earth link.net...
> Took my '93 XJ 4L with 190K miles on into the shop because it was blowing
> oil into the air filter and the crankcase ventilation system is working
> fine. Mechanic told me the compression was getting low. Come to think of
it
> it does seem to have lost some power over time, although it's hard to
tell.
>
> What would be my best option here? Get a new vehicle? Have a rebuilt
engine
> put in? Have the present engine fixed? Ignore the problem until it breaks
> down?
>
> It's not blowing blue smoke, it leaks a little from the main seal and the
> valve cover gasket, and opinions vary on whether the exhaust manifold is
> cracked or not. Near as I can tell nothing around the engine has ever been
> worked on. Any suggestions what to do are apreciated...
>
>



--
Posted via a free Usenet account from http://www.teranews.com

Re: 93 XJ low compression, what are my options.
 

On Wed, 16 May 2007 22:14:28 -0700, L.W. (Bill) ------ III wrote:


> just reaming out the orifice


You do have a way with words......