Kris smith

ok so my 88 keeps losing what looks like oil all down the driver side fender well and frame my air filter is soaked and the air box is full of oul and dirt mix i know its blow by what do i need to do to aleviate this ? im tires of the grease and gunk

cruiser54

Not necessarily blow-by but just clogged CCV hoses/fittings causing crankcase pressure to blow into the air cleaner. Replace the CCV hoses and grommets.

Renix Vacuum Harnesses
The vacuum harness that attaches to the front of the valve cover and includes the grommet/fitting, and is called the front harness, is Napa part number BK 715-1367
　

http://www.napaonline.com/Catalog/Result.aspx?Ntt%3d715-1367%26Ntk%3dKeyword%26Nty%3d1%26Dn%3d0%26D%3d715-1367%26Dk%3d1%26Dp%3d3%26N%3d0
　
The vacuum harness that is closest to the air cleaner, EGR etc, and is called the rear harness, is Napa part number BK-715-1366.


http://www.napaonline.com/Catalog/Result.aspx?Ntt%3d715-1366%26Ntk%3dKeyword%26Nty%3d1%26Dn%3d0%26D%3d715-1366%26Dk%3d1%26Dp%3d3%26N%3d0

　

The tube from the rear of the valve cover to the intake manifold is part number 715-1365.


http://www.napaonline.com/Catalog/Result.aspx?Ntt%3d715-1365%26Ntk%3dKeyword%26Nty%3d1%26Dn%3d0%26D%3d715-1365%26Dk%3d1%26Dp%3d3%26N%3d0

　

Revised 09-11-2012

Kris smith

Thank you cruiser! I was skeptical that blow by what what I was getting seeing as it only has 190k ill replace those harnesses

cruiser54

There may be another little one, too. From the rear grommet of the valve cover to intake. Also, replace that rear grommet. They swell shut.

How's your valve cover gasket? Leaking by chence? If so, here's an opportunity to do another mod to reduce oil in the air filter.

Kris smith

It is leaking badly. Ill have to do that mod as well. If I ever get around to fixing things

cruiser54

Here's the mod. Get off your butt and do it. Use a Felpro blue valve cover gasket. Weather in San Diego is always pleasant and conducive to working on Jeeps.

Cruiser’s Valve Cover Mod

Most early and even later Renix 4.0s could be bothered by excessive oil in the air cleaner box. A fix from my old days as Service Manager at a Jeep dealership follows. Information was provided to me from a buddy at JeepTech during those days. I don’t believe it ever came out in a Technical Service Bulletin.

　

Remove the valve cover and turn it over. Next, remove the fluted tubes that are now facing you by removing three screws on each. Chop 1 inch off each of them. Then, about a half inch up from the area where you just sawed them off, drill a half inch hole in the tubes so the holes will face the rear of the valve cover. Clean and de-burr/sand all rough edges nicely, clean with solvent, and reinstall. Don’t be concerned about the chintzy gaskets that will probably crumble into oblivion when you remove the fluted tubes. They can go back together without gaskets.

Kris smith

I will do that mod. But I Dont Know when. I'm a tech at a Benz dealer I work on cars all day I really don't want to work on cars in my off time too

cruiser54

Lightweight.

Kris smith

No not a light weight I've been building ad maintaining cars since I was 14. I'm tired of doin it every waking second

cruiser54

Just pokin fun at ya.