OK, I've searched the forum, and the aftermarket websites.

Does anyone make an aluminum (or other non plastic material) valve cover for the 4.0 engine??? Or am I stuck with plastic? [img]/ubbthreads/images/graemlins/lame.jpg[/img]

I have a vavle cover gasket leak, so I have to yank the valve cover anyway, thought I'd put something better back on.

Thanks,
Jess

Sure, for $100 you can buy one. Click on the graphic!

LEVE, leave it to you [img]/ubbthreads/images/graemlins/wink.gif[/img]
I did not check 4wd.com.

I am of course confused now, they say it replaces the original steel valve cover. Mine is plastic. I thought everyone's was plastic on the 4.0L

Any thoughts?

Jess

Also, here is the same product from JCW, which says the fitment is 94-04, NOT 91-04

That's why I didn't think there was one out there for my 91 YJ...


http://www.jcwhitney.com/autoparts/Produ...9+10201/c-10101

91 YJ? Are you sure you have the 4.0?
Is it fuel injected or carb?
If you have a carb, then you have a 4.2L.
I believe all of the 4.0's had Aluminum.

[ QUOTE ]
I believe all of the 4.0's had Aluminum.

[/ QUOTE ]

John is right ,,, if you have a 4.0L is should have an aluminum valve cover if you have plastic you probably have a 4.2,, he he unless some one
made a few changes. [img]/ubbthreads/images/graemlins/thumbsup.gif[/img]

I'm scratching my head on this one... every 4.0L engine I've seen did have an OEM metal cover. But changes were made, here's the part numbers:

5300 9243, 1990 -1991
5300 0054, 1992- 1993
5302 0482, 1994 and up

OK, the Jeep is at the mechanic's. He checked the VIN, and said the 10th digit was an 'M', which means 1991. I also checked the VIN back when I bought it, so I am fairly confident the Jeep is a 91.

It also has a 4.0L sticker on the back end of the Jeep, for what it's worth.

The mechanic verified that the valve cover IS plastic. He said the replacement kit includes a new plastic cover and a new gasket that is sort of molded in and part of the cover.

Has someone changed the engine, or the head on my engine???

HELP

Well if indeed you have a plastic valve cover on a 91 YJ 4.0 L motor. I might suggest you get an Aluminum valve cover,(stock from dealer) from a 91 or 92 XJ should fit with no issues. [img]/ubbthreads/images/graemlins/grin.gif[/img]

Carb of FI?
If it's a carb...you have 4.2
If it's FI, you have a 4.0....

If you do in fact have a 4.2....then I have an almost new AL valve cover that came off my CJ that I will sell you....it needs a good home....