94XJ Blow-by
 

I took my 94XJ to a local Jeep hobbyist install/repair shop with some
blow-by in which I have, he explained that I need to flush my engine, but
googling around suggests that it may be my PCV valve (which is broken,
physically) but also when the guy stuck his finger into the filler cap there
was a very good amount of sludge, he wants to charge 40$ for an oil change
to flush out the contaminants this week and to return next week to flush it
again for another 40$, as well as he will replace the PCV, should this be a
go? or should I go somewhere else?

Any suggestions are greatly appreciated.

Adonis

Re: 94XJ Blow-by
 

Most XJ's don't have a PCV valve. What engine do you have in there?

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Adonis wrote:
>
> I took my 94XJ to a local Jeep hobbyist install/repair shop with some
> blow-by in which I have, he explained that I need to flush my engine, but
> googling around suggests that it may be my PCV valve (which is broken,
> physically) but also when the guy stuck his finger into the filler cap there
> was a very good amount of sludge, he wants to charge 40$ for an oil change
> to flush out the contaminants this week and to return next week to flush it
> again for another 40$, as well as he will replace the PCV, should this be a
> go? or should I go somewhere else?
>
> Any suggestions are greatly appreciated.
>
> Adonis

Re: 94XJ Blow-by
 

Most XJ's don't have a PCV valve. What engine do you have in there?

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Adonis wrote:
>
> I took my 94XJ to a local Jeep hobbyist install/repair shop with some
> blow-by in which I have, he explained that I need to flush my engine, but
> googling around suggests that it may be my PCV valve (which is broken,
> physically) but also when the guy stuck his finger into the filler cap there
> was a very good amount of sludge, he wants to charge 40$ for an oil change
> to flush out the contaminants this week and to return next week to flush it
> again for another 40$, as well as he will replace the PCV, should this be a
> go? or should I go somewhere else?
>
> Any suggestions are greatly appreciated.
>
> Adonis

Re: 94XJ Blow-by
 

Most XJ's don't have a PCV valve. What engine do you have in there?

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Adonis wrote:
>
> I took my 94XJ to a local Jeep hobbyist install/repair shop with some
> blow-by in which I have, he explained that I need to flush my engine, but
> googling around suggests that it may be my PCV valve (which is broken,
> physically) but also when the guy stuck his finger into the filler cap there
> was a very good amount of sludge, he wants to charge 40$ for an oil change
> to flush out the contaminants this week and to return next week to flush it
> again for another 40$, as well as he will replace the PCV, should this be a
> go? or should I go somewhere else?
>
> Any suggestions are greatly appreciated.
>
> Adonis

Re: 94XJ Blow-by
 

Most XJ's don't have a PCV valve. What engine do you have in there?

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Adonis wrote:
>
> I took my 94XJ to a local Jeep hobbyist install/repair shop with some
> blow-by in which I have, he explained that I need to flush my engine, but
> googling around suggests that it may be my PCV valve (which is broken,
> physically) but also when the guy stuck his finger into the filler cap there
> was a very good amount of sludge, he wants to charge 40$ for an oil change
> to flush out the contaminants this week and to return next week to flush it
> again for another 40$, as well as he will replace the PCV, should this be a
> go? or should I go somewhere else?
>
> Any suggestions are greatly appreciated.
>
> Adonis

Re: 94XJ Blow-by
 

So I guess no matter what engine you have it does need a couple
flushes. You should put an additive in, drive it a bit then change the
oil. Several times.

I am concerned a bit with the PCV thing. If the mechanic doesn't know
the difference between a PCV and CCV, well... Run fast...

Jeep engines are really touchy about the PCV and CCV systems working
right or they can blow massive amounts of oil into the air filters.
Enough I know a few folks that got suckered into new engines only to
have the same oil blow that only needed a $5.00 fix...

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Adonis wrote:
>
> I took my 94XJ to a local Jeep hobbyist install/repair shop with some
> blow-by in which I have, he explained that I need to flush my engine, but
> googling around suggests that it may be my PCV valve (which is broken,
> physically) but also when the guy stuck his finger into the filler cap there
> was a very good amount of sludge, he wants to charge 40$ for an oil change
> to flush out the contaminants this week and to return next week to flush it
> again for another 40$, as well as he will replace the PCV, should this be a
> go? or should I go somewhere else?
>
> Any suggestions are greatly appreciated.
>
> Adonis

Re: 94XJ Blow-by
 

So I guess no matter what engine you have it does need a couple
flushes. You should put an additive in, drive it a bit then change the
oil. Several times.

I am concerned a bit with the PCV thing. If the mechanic doesn't know
the difference between a PCV and CCV, well... Run fast...

Jeep engines are really touchy about the PCV and CCV systems working
right or they can blow massive amounts of oil into the air filters.
Enough I know a few folks that got suckered into new engines only to
have the same oil blow that only needed a $5.00 fix...

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Adonis wrote:
>
> I took my 94XJ to a local Jeep hobbyist install/repair shop with some
> blow-by in which I have, he explained that I need to flush my engine, but
> googling around suggests that it may be my PCV valve (which is broken,
> physically) but also when the guy stuck his finger into the filler cap there
> was a very good amount of sludge, he wants to charge 40$ for an oil change
> to flush out the contaminants this week and to return next week to flush it
> again for another 40$, as well as he will replace the PCV, should this be a
> go? or should I go somewhere else?
>
> Any suggestions are greatly appreciated.
>
> Adonis

Re: 94XJ Blow-by
 

So I guess no matter what engine you have it does need a couple
flushes. You should put an additive in, drive it a bit then change the
oil. Several times.

I am concerned a bit with the PCV thing. If the mechanic doesn't know
the difference between a PCV and CCV, well... Run fast...

Jeep engines are really touchy about the PCV and CCV systems working
right or they can blow massive amounts of oil into the air filters.
Enough I know a few folks that got suckered into new engines only to
have the same oil blow that only needed a $5.00 fix...

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Adonis wrote:
>
> I took my 94XJ to a local Jeep hobbyist install/repair shop with some
> blow-by in which I have, he explained that I need to flush my engine, but
> googling around suggests that it may be my PCV valve (which is broken,
> physically) but also when the guy stuck his finger into the filler cap there
> was a very good amount of sludge, he wants to charge 40$ for an oil change
> to flush out the contaminants this week and to return next week to flush it
> again for another 40$, as well as he will replace the PCV, should this be a
> go? or should I go somewhere else?
>
> Any suggestions are greatly appreciated.
>
> Adonis

Re: 94XJ Blow-by
 

So I guess no matter what engine you have it does need a couple
flushes. You should put an additive in, drive it a bit then change the
oil. Several times.

I am concerned a bit with the PCV thing. If the mechanic doesn't know
the difference between a PCV and CCV, well... Run fast...

Jeep engines are really touchy about the PCV and CCV systems working
right or they can blow massive amounts of oil into the air filters.
Enough I know a few folks that got suckered into new engines only to
have the same oil blow that only needed a $5.00 fix...

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Adonis wrote:
>
> I took my 94XJ to a local Jeep hobbyist install/repair shop with some
> blow-by in which I have, he explained that I need to flush my engine, but
> googling around suggests that it may be my PCV valve (which is broken,
> physically) but also when the guy stuck his finger into the filler cap there
> was a very good amount of sludge, he wants to charge 40$ for an oil change
> to flush out the contaminants this week and to return next week to flush it
> again for another 40$, as well as he will replace the PCV, should this be a
> go? or should I go somewhere else?
>
> Any suggestions are greatly appreciated.
>
> Adonis

Re: 94XJ Blow-by
 

Ah, thanks, you just opened the can of worms that I was looking at. My
`89 Cherokee 4.0 is blowing a respectable amount of oil into the filter
box, as well as around both valve cover grommets and the filler cap.
There's a small diameter hard tube that exits the rear third of the valve
cover and enters the intake manifold. There's a large-bore hard tube that
exits the front third of the valve cover and enters the rear of the filter
box. Clearly something isn't venting correctly, but where should I look?


On Mon, 12 Apr 2004, Mike Romain wrote:

> So I guess no matter what engine you have it does need a couple
> flushes. You should put an additive in, drive it a bit then change the
> oil. Several times.
>
> I am concerned a bit with the PCV thing. If the mechanic doesn't know
> the difference between a PCV and CCV, well... Run fast...
>
> Jeep engines are really touchy about the PCV and CCV systems working
> right or they can blow massive amounts of oil into the air filters.
> Enough I know a few folks that got suckered into new engines only to
> have the same oil blow that only needed a $5.00 fix...
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Adonis wrote:
> >
> > I took my 94XJ to a local Jeep hobbyist install/repair shop with some
> > blow-by in which I have, he explained that I need to flush my engine, but
> > googling around suggests that it may be my PCV valve (which is broken,
> > physically) but also when the guy stuck his finger into the filler cap there
> > was a very good amount of sludge, he wants to charge 40$ for an oil change
> > to flush out the contaminants this week and to return next week to flush it
> > again for another 40$, as well as he will replace the PCV, should this be a
> > go? or should I go somewhere else?
> >
> > Any suggestions are greatly appreciated.
> >
> > Adonis
>