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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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).


'06 TJ Rubicon; seemed like a good idea at the time; had many CJs...
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