258 valve cover on 4.0 head ?????? - JeepForum.com

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post #1 of 4 Old 07-04-2009, 11:54 AM Thread Starter
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1985 CJ7 
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258 valve cover on 4.0 head ??????

I just saw on ebay some guy claiming a 258 and 4.0 valve cover are interchangeable..... Anyone know if this is true ? Doing the 4.0 head swap thing and this would save me a little $ and time.....

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post #2 of 4 Old 07-05-2009, 06:06 PM
Reelm n Rubi
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won't work,sorry.

2003 Lt. Khaki Rubicon automatic
Supercharged 4.7 stroker w/ Hesco aluminum head
70mm F&B throttle body
Kieth Black forged 944 pistons
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For SALE-- standard drop pitman arm redrilled with new 1 ton GM tye rod end (bottom mount). Perfect $30
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post #3 of 4 Old 07-24-2009, 01:43 AM
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It won't work without modification. If you want to see why just compare the gaskets.
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post #4 of 4 Old 07-27-2009, 09:07 AM
Happy Joe
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Just use the stock cast 4.0 valve cover when you switch to the 4.0 head... they are cheap and widely available in scrap yards (I got one free with a head, I just asked the guy at the counter and he threw it in for nothing).


...a well prepped, well driven, vehicle should do well in any terrain, including the highway.

Carburetors became obsolete during the last century... do what ever it takes to get fuel injection...It makes bigger grins off road.
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