Re: 4.0 Head on a 258

[Todd Tomason <jayscore@xxxxxxxxxxxxx>]

Fran,

Did you mean www.amcforums.com?  I went over there and signed up to see what 
you said, and apparently Branden accidentally wiped all the messages about an 
hour ago when an upgrade failed.  Would you mind reposting it here?

I recently purchased a 4.0 cylinder head from Clearwater Cylinder Heads that's 
supposed to have had the appropriate holes already welded up.  This a  
rebuilt head with the appropriate valve work, etc. already done on it.  

I guess my biggest question is where do I still use 258 parts, and where do I 
use 4.0 parts?  For example, I assume I can use stock 4.0 rockers.  My 258 is 
an 83 that is in a Spirit.  

I'm also thinking that this is a good time to replace the timing chain.  I 
heard somewhere that you can use a 4.0 timing cover on the 258.  True?  It's 
supposed to have a cam button.  

Keep in mind that this is all pretty new to me.  I only did my first intake a 
couple of months ago.  I've never head a head off of an engine before.  

Todd

On Friday 06 May 2005 13:00, farna@xxxxxxx wrote:
> Did you post over at www.amcforums.net? If so I left an answer. I'll post a
> short version here.
>
> Tim's site is great! The only physical concern is the wash-out holes on the
> right edge of the head. They need to be plugged. Easiest DIY way is to pack
> the holes with water soluble packing peanuts and epoxy (need 1/16" epoxy,
> minimum) then let it cure for 24 hours. Next best is to drill the holes out
> to 3/4" and pop in 3/4" welch plugs (freeze plugs) with a little sealer on
> the edges. You could thread for flush pipe plugs, but that's goin
> overboard! Lastly the holes can be welded, but not recommended unless
> you're a good welder.
>
> The 4.0L head (and block) is slightly wider than the older counterparts.
> The 4.0L head gasket blocks these holes, they are to close to the edge
> ofthe block when the head's on the older block.
>
> On May 5, 2005 Todd Tomason wrote:
> > Anyone have any good information on adapting a 4.0 cylinder head to a
> > 258?  I found an article by Tim Weaver on the web.  Are there other sites
> > I'm not finding?
> >
> > Thanks,
> >
> >
> > Todd
> >
> >
> >
> > .
>
> =============================================================

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