| Re: [GMCnet] Mismatched Heads Again [message #322709 is a reply to message #322700] |
Sat, 26 August 2017 22:34   |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma:
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Senior Member |
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If your going to do heads, majority of the time your valve guides will be
worn so to replace the guides is not that simple unless you have the tools
in your shop.
Also check the spring tensions with a tool.
Oh, heads should be magnafluxed as there are always chance of cracks.
On Sat, Aug 26, 2017 at 4:43 PM, Carl Stouffer wrote:
> About a month ago, I mentioned that I had discovered that my '75 455 had a
> J head on one side and a K head on the other side. The K head had a badly
> burnt exhaust valve and needed to be replaced/repaired. For lack of a
> better option, I ended up getting a pair of K heads reconditioned and had
> them
> installed by my very good, trusted mechanic. I feel kind of wimpy for not
> doing the job myself, since I know several of you who wouldn't hesitate to
> do a valve job who are 10 - 15 years older than I am, but I am also not
> retired and had time restraints which made it more sensible to hire out the
> job.
>
> The weird thing is that as far as I knew, the engine on this coach was
> unmolested. Although the heads were different castings with different size
> intake valves, they were painted the exact same color and both had the
> steel shim OEM type head gaskets under them.
>
> Just curious to see if anyone has ever run into something like this before
> or if any of you GM guys have ever heard of anything coming out of the
> factory like that.
>
> http://www.gmcmhphotos.com/photos/misc-gmc/p63626-mismatched-heads.html
>
> http://www.gmcmhphotos.com/photos/misc-gmc/p63629-p1020594.html
>
> http://www.gmcmhphotos.com/photos/misc-gmc/p63629-p1020594.html
> --
> Carl Stouffer
> '75 ex Palm Beach
> Tucson, AZ.
> Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive,
> Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American
> Eagles,
> Solar battery charging. GMCSJ and GMCMI member
>
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>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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