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Blow by need help!!!

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Old Feb 28, 2012 | 10:36 PM
  #1  
WyoWagner's Avatar
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From: clayton nm
Year: 1988
Model: Cherokee
Engine: strait 6
Default Blow by need help!!!

ok so on my 1988, inline 6, i had blowby coming from the front hose into my air filter i replaced the valve cover with one out of a 96 and i replaced the oil pump and the oil sender. now its leaking oil from the oil cap. besides a broken ring what can cause this.
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Old Feb 28, 2012 | 11:05 PM
  #2  
freegdr's Avatar
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Joined: Mar 2010
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From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
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Originally Posted by WyoWagner
ok so on my 1988, inline 6, i had blowby coming from the front hose into my air filter i replaced the valve cover with one out of a 96 and i replaced the oil pump and the oil sender. now its leaking oil from the oil cap. besides a broken ring what can cause this.
clogged ccv valve?
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Old Feb 28, 2012 | 11:10 PM
  #3  
Gorillaxj's Avatar
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From: Salt Lake City, UT
Year: 2000
Model: Cherokee
Engine: 4.0L
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Is the cap for the right cover? seams like an odd place to leak...

could be the PCV valve or "orifice"

Blow by is from compression leaking past the rings. Its always normal to have some, but to much is caused from rings not sealing properly. it could be from being washed out, broken, worn, cracked, broken ring land on the piston ect... since its an 88 I would just assume they are worn rings.
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Old Feb 29, 2012 | 12:27 AM
  #4  
PINIT 141's Avatar
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From: Sperry,OK
Year: 1998
Model: Grand Cherokee
Engine: 4.0
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+1 on the PVC valve. Check that thing out. Could be an easy fix.
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Old Feb 29, 2012 | 12:49 AM
  #5  
94zjdriver's Avatar
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From: Indianapolis Indiana
Year: 1994
Model: Grand Cherokee
Engine: 5.2
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Well that would do. it..
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