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Author Topic: Metal valve cover  (Read 2295 times)

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Offline FourbangerYJ

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Metal valve cover
« on: November 20, 2009, 11:02:15 PM »
A friend of mine has a 90 W/ 2.5L and is looking for a metal valve cover. I snooped around a bit and did not see any metal ones, lots of plastic thou.
Does it exist?
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Offline Jeffy

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Re: Metal valve cover
« Reply #1 on: November 20, 2009, 11:47:17 PM »
I don't think so.
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Offline dwtaylorpdx

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Re: Metal valve cover
« Reply #2 on: November 20, 2009, 11:47:48 PM »
My 94 has a cast Aluminum stock valve cover. So maybe check wrecking yards?

Dave
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Offline Jeffy

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Re: Metal valve cover
« Reply #3 on: November 21, 2009, 12:59:19 AM »
Quote from: dwtaylorpdx on November 20, 2009, 11:47:48 PM
My 94 has a cast Aluminum stock valve cover. So maybe check wrecking yards?

Dave

>1990 have aluminum valve covers but for some reason I don't think they'll work on a TBI system.
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Offline chardrc

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Re: Metal valve cover
« Reply #4 on: November 21, 2009, 02:07:30 PM »
Quote from: Jeffy on November 21, 2009, 12:59:19 AM
>1990 have aluminum valve covers but for some reason I don't think they'll work on a TBI system.

when i got my 1990yj it had a cracked valve cover and couldn't find a metal one so i settled for a plastic one.. but for some reason the dealer couldn't' get my the correct gr-omits for the pcv system (after like 4 tires i gave up and used silicon to fill the gap in the wrong grommet.) they would either get a grommet that fit the valve cover or one that fit what goes into the valve cover... if i had to do it again id get a metal one for the 1991+ and change the pcv system over (shouldn't realy be that different or effect the fuel injection as long as you have air in and out. 
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Offline Jeffy

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Re: Metal valve cover
« Reply #5 on: November 21, 2009, 02:18:26 PM »
Quote from: chardrc on November 21, 2009, 02:07:30 PM
when i got my 1990yj it had a cracked valve cover and couldn't find a metal one so i settled for a plastic one.. but for some reason the dealer couldn't' get my the correct gr-omits for the pcv system (after like 4 tires i gave up and used silicon to fill the gap in the wrong grommet.) they would either get a grommet that fit the valve cover or one that fit what goes into the valve cover... if i had to do it again id get a metal one for the 1991+ and change the pcv system over (shouldn't realy be that different or effect the fuel injection as long as you have air in and out. 
The +91's do not use a PCV system.
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Torch_Ind

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Re: Metal valve cover
« Reply #6 on: November 21, 2009, 02:49:28 PM »


I have this one up for grab's it's not plastic.

Is that what your looking for?
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Offline FourbangerYJ

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Re: Metal valve cover
« Reply #7 on: November 21, 2009, 04:29:28 PM »
What would it take to make the 91 and newer work on the 90 and older?
Anyone have a PIC of the 90 style?

TORCH: that is what he is looking for. Seems there is the question if it will work with the TBI VS. MPFI.
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Offline chardrc

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Re: Metal valve cover
« Reply #8 on: November 21, 2009, 05:35:30 PM »
This is the best picture i have and doesn't realy show the contoures of it.. jut what sticks out of it...
...

looking at pictures and part numbers on autozone.com comparing 1990 to 1991, I found that they have different part numbers (but the 1990 was a rubber gasket and the 1991 was cork rubber  :confused:) the pictures do look like the shape is slightly different (more ins and outs with the metal one) if that can be trusted. :confused:

edit: found picture on quadratec web site

« Last Edit: November 21, 2009, 05:39:21 PM by chardrc »
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1990 YJ 4cly, ax5, 2.5 inch BDS lift, 31 MTr\'s,  Powertrax-lockers all around, track-bars removed, boomerang shackles, warn m8000 winch, electric fan. [sold but not forgotten]

2007 jk Rubicon 2dr

Offline dwtaylorpdx

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Re: Metal valve cover
« Reply #9 on: November 22, 2009, 12:35:44 AM »
I had issues with leaks and called felpro's tech line.

Wonder of wonders I ended up talking to a guy who knew his stuff, and was a YJ owner.

There are 4 different 2.5 liter valve cover gaskets. 2 plastic and 2 metal cover variants.

You have to look at teh cover, teh key difference is whether the cover has pinch points near the bolts.

The 91+ valve cover has the extra fitting for the metered breather fitting. The early one has a PCV can.
With some minor adjustments they should interchange.

Dave
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Torch_Ind

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Re: Metal valve cover
« Reply #10 on: November 22, 2009, 12:27:56 PM »
well I'm selling the one I posted if your interested let me know
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Offline FourbangerYJ

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Re: Metal valve cover
« Reply #11 on: November 22, 2009, 02:26:59 PM »
Quote from: Torch_Ind on November 22, 2009, 12:27:56 PM
well I'm selling the one I posted if your interested let me know

By the looks of it, it won't work.
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Offline dwtaylorpdx

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Re: Metal valve cover
« Reply #12 on: November 22, 2009, 02:32:55 PM »
What are you seeing that looks different? Just curious... Cause all 2.5 use the same head.

Dave

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Offline FourbangerYJ

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Re: Metal valve cover
« Reply #13 on: November 22, 2009, 03:14:38 PM »
Quote from: dwtaylorpdx on November 22, 2009, 02:32:55 PM
What are you seeing that looks different? Just curious... Cause all 2.5 use the same head.

Dave



One has 3 holes the other only 2. I would imagine it would bolt to the head. What do you do about adding a hole? Just drill it, it looks pretty large.
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Offline dwtaylorpdx

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Re: Metal valve cover
« Reply #14 on: November 22, 2009, 03:29:23 PM »
You mean the holes for the hoses and such? or the mounting holes?

On a MPI you have a breather connection and a fitting for crankcase metered breathing. (CCV is a small brass fitting like 1/4 inch on side of cover.)

On the TBI you should have a breather and PCV valve. (PCV and Breather are like 3/4 in holes on top of cover.)

You might be able to find a Breather cap to replace the oil filler cap and use the original breather for the PCV valve?

I might be missing one,,, What do you see on yours?

Dave

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94 YJ - 2.5 Hesco Cam B&B Ported - AX5 Trans w/Centerforce Dual Friction Clutch - 4" Rough Country Lift W/Skyjacker Shocks - D44 Rear/ARB - D30/ARB - ARB Compressor - Warn M8000 in Custom Bumper - Reunell Rear Bumper - Metalcloak 6" Body Armor Kit - Tuffy Console - 265x85-16 Tires - 2M Radio
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