Oil blow by
Thread Starter
Newbie
Joined: Jun 2017
Posts: 8
Likes: 0
From: Hemet, CA
Year: 1988
Model: Cherokee
Engine: 4.7L I6
I'm having an issue with oil blowing out the valve cover vent tube. My normal oil pressure is between 40lbs at idle and 58-59lbs at speed. Any Ideas??
CF Veteran




Joined: May 2012
Posts: 7,965
Likes: 964
From: Lost in the wilds of Virginia
Year: 1998 Classic (I'll get it running soon....) and 02 Grand
Model: Cherokee (XJ)
Engine: 4.0
It's not oil pressure that does that, it's crankcase pressure.
What year vehicle?
What year vehicle?
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,579
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Are all the vacuum lines there?
Are you getting oil on your air filter?
Check this out http://cruiser54.com/?p=131
Are you getting oil on your air filter?
Check this out http://cruiser54.com/?p=131
Thread Starter
Newbie
Joined: Jun 2017
Posts: 8
Likes: 0
From: Hemet, CA
Year: 1988
Model: Cherokee
Engine: 4.7L I6
Are all the vacuum lines there?
Are you getting oil on your air filter?
Check this out http://cruiser54.com/?p=131
Are you getting oil on your air filter?
Check this out http://cruiser54.com/?p=131
Trending Topics
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,579
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Thread Starter
Newbie
Joined: Jun 2017
Posts: 8
Likes: 0
From: Hemet, CA
Year: 1988
Model: Cherokee
Engine: 4.7L I6
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,579
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Thread Starter
Newbie
Joined: Jun 2017
Posts: 8
Likes: 0
From: Hemet, CA
Year: 1988
Model: Cherokee
Engine: 4.7L I6
I'm a little behind on this due to health reasons, but I am getting ready to do this mod to the valve cover. I got the new vacuum harness. My question is: The pics and instructions you have say to drill the 1/2" hole on the flat side of the tubes facing the intake side of the valve cover. The video says to drill the holes on the side of the tubes facing the firewall.???
Thread
Thread Starter
Forum
Replies
Last Post
chrs93
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
9
May 17, 2015 08:20 PM
94HOCHEROKEE
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
4
Jul 25, 2014 12:51 PM
SthrnGent
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
5
Jun 15, 2014 08:36 AM
87cherokee14
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
11
Jul 14, 2012 12:24 AM
zebvance
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
8
Jun 20, 2012 05:50 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)



