Ccv/PVC and valve cover replacement?
03-02-2012, 03:38 PM
#16
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
i got enough cell reception to watch... dont tell my boss...
right, but there is still vacuum. if there wasnt vacuum, why doesnt a vacuum leak whistle? and why isnt this filter (my pic) not covered in oil?
mind you, im not trying to come off as a dick. im trying to understand something my reasoning says is wrong (but if i am wrong, consider myself "learned" lol)
right, but there is still vacuum. if there wasnt vacuum, why doesnt a vacuum leak whistle? and why isnt this filter (my pic) not covered in oil?
mind you, im not trying to come off as a dick. im trying to understand something my reasoning says is wrong (but if i am wrong, consider myself "learned" lol)
03-02-2012, 03:59 PM
#18
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Year: 1987
Model: Wagoneer
Engine: Renix 4.0
this explains it a littlehttp://en.wikipedia.org/wiki/Crankca...ilation_system
03-02-2012, 05:16 PM
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
03-02-2012, 05:20 PM
#25
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Year: 1988
Model: Comanche
Engine: 4.0
heres a good picturehttp://www.naxja.org/forum/showthread.php?p=244474967
All those lines don't look like mine. I guess cause I have no ac? there is not compressor.
03-02-2012, 05:21 PM
#26
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Year: 1988
Model: Comanche
Engine: 4.0
03-02-2012, 05:45 PM
#27
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Year: 1987
Model: Wagoneer
Engine: Renix 4.0
No. The line that comes out the rear of the valve cover goes to the intake manifold. Like i said earlier, the ccv consists of a hose going from the top of the airbox to the front of the valve cover. Then towards the rear of the head, a line goes from there to the intake manifold.
03-03-2012, 04:26 AM
#28
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Year: 1993
Model: Cherokee
Engine: 4.0
Originally Posted by freegdr
pull the rear line off and spray carb cleaner into the tube to clean it out watch for back spray in the eyes,the front tube should not be unhooked from the throttle body suction this removes crank case pressure when vacuum is not present such as accelration and high way speed excessive crank case pressure can cause gasket leakage and excessive blow by
03-03-2012, 05:06 AM
#29
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
when the engine is brought of idle the suction from the throttle body draws it out thru the front hose in the valve cover thru your cold air intake tube
03-03-2012, 03:40 PM
#30
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Year: 1993
Model: Cherokee
Engine: 4.0
Originally Posted by freegdr
when the engine is brought of idle the suction from the throttle body draws it out thru the front hose in the valve cover thru your cold air intake tube