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  • May 06, 2024, 08:09:23 PM

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Author Topic: 1980 258 valve cover  (Read 832 times)

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Offline Okhuman

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1980 258 valve cover
« on: November 29, 2023, 05:49:39 PM »
Hey yall
I'm looking to keep oil inside my engine and the crud out.  I've the plastic valve cover.  I've been doing research and as best I can tell there are no aftermarket options for the years prior to 1981.  Is that correct?  It seems odd that there would be so many options for 81-87 but nothing before or after those years. 
Thanks for sharing your experiences.   I've gotten lots of great tips off this forum
Cheers
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Offline maddog

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Re: 1980 258 valve cover
« Reply #1 on: November 29, 2023, 09:16:06 PM »
I have a 1980 Eagle that I am putting a stroker motor in and it came from the factory with a metal valve cover (I know for a fact that it did because I've had the car since 06) and it's my understanding that all 1980 Eagles had a metal valve cover.
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1998 CHEVY S10 (DAILY DRIVER/PROJECT) INTIMIDATIN'
1980 AMC EAGLE WAGON (PROJECT) EAGLE EYES
http://forums.amceaglesden.com/index.php?topic=30758.0
1983 AMC EAGLE LIMITED WAGON-SURVIVOR (gone)
http://forums.amceaglesden.com/index.php?topic=32372.0

Offline Artmodels

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Re: 1980 258 valve cover
« Reply #2 on: November 30, 2023, 10:25:53 AM »
Ibcollect 1960 ramblers with the same engine except with the integrated intake exhaust manifold head.  If memory serves me correct, there is the valve cover bolt attachment that can be put on the newer engine valvetrain, and it might work.
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Online vangremlin

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Re: 1980 258 valve cover
« Reply #3 on: November 30, 2023, 04:27:52 PM »
Yes, it's my understanding that all 1980 engines had the metal valve cover, but it is not compatible with later models. 
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1981 Kammback 258 - "Pepe"
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Offline Okhuman

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Re: 1980 258 valve cover
« Reply #4 on: December 04, 2023, 08:09:18 PM »
Huh, I wonder if this 80 eagle has a 1981 model year engine then...   it definitely has a plastic valve cover.  Would the stamp on the block be easy to decode this?
It's crazy how common this question is, yet I haven't been able to dial the answer down.
Another way to phrase the question maybe: what valve covers are available for those motors that do have the plastic covers?
Thanks all
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Offline AMC of Houston

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Re: 1980 258 valve cover
« Reply #5 on: December 04, 2023, 09:06:31 PM »
The parts books back up the valve cover thing - '80 is metal, '81 - '85+ plastic (looks like they went to the aluminum version sometime in '86).

Lots of aftermarket aluminum replacements out there for the plastic cover; however you'll have to drill and tap (use a bottom tap) some of the plastic cover's alignment holes for small bolts.  Don't drill too far, or you'll go into a water jacket.   If you do that, not the end of the world - I've found blue Loctite will seal up the threads nicely against coolant seepage.
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Offline Okhuman

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Re: 1980 258 valve cover
« Reply #6 on: December 05, 2023, 08:31:11 PM »
Thanks, this is starting to make sense.  I got a tsm today and decoded the block code.   It's 210c26 so the engine has been replaced at some point.  I think that means October 26, 1982...  Good news, really didn't want that plastic time bomb on top.  Initial disassembly was gnarly!
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