AMC Eagle Den Forum

The Mighty 258 => The Engine => Topic started by: demonicdragon on January 15, 2013, 01:08:20 PM

Title: 4.0 valve covers swaps through years
Post by: demonicdragon on January 15, 2013, 01:08:20 PM
for those who dont know im running with a 4.0 head on my 4.2 block. i got a 90 valve cover but im lookibg to replace it. the later year valve covers are cheaper. anyone know any fitment issues?
Title: Re: 4.0 valve covers swaps through years
Post by: shaggimo on January 15, 2013, 02:22:21 PM
Nope. I have an older valve cover on my newer 4.0, lol, just get the right gasket and fasteners for the stamped cover, (I assume that's what you're going with).
Title: Re: 4.0 valve covers swaps through years
Post by: demonicdragon on January 15, 2013, 03:48:23 PM
well im doing the opposite but from what it sounds it ccan be done. thanks
Title: Re: 4.0 valve covers swaps through years
Post by: mudkicker715 on January 15, 2013, 04:13:53 PM
They look the same from a 89 to a 94.and whatever year i have on the 89 stroker. i changed out thevrenix head on the 89.
Title: Re: 4.0 valve covers swaps through years
Post by: shaggimo on January 15, 2013, 04:15:51 PM
Quote from: demonicdragon on January 15, 2013, 03:48:23 PM
well im doing the opposite but from what it sounds it ccan be done. thanks

Yeah, thats it, lol, just reread my post, you can swap back and forth as long as you have the proper gasket and hardware (they are different).
Title: Re: 4.0 valve covers swaps through years
Post by: BenM on January 16, 2013, 10:44:11 AM
The mid-87 to the end 258 cast aluminum valve covers are exactly the same attachment to the head. When AMC designed away the plastic cover it used the same pattern on both engines.
Title: Re: 4.0 valve covers swaps through years
Post by: carnuck on January 16, 2013, 06:45:38 PM
I have a '79/81 head with the tin valve cover in my for sale pile for $50.
Title: Re: 4.0 valve covers swaps through years
Post by: demonicdragon on January 17, 2013, 08:21:20 AM
thanks guys i found a used one on the bidding site. that should work. thanks