Thanks for all the suggestions. This engine was/is being rebuilt by a very
experienced rebuilder. Has built many, many aircooled and WBX engines over
the years. I've got one of his in my 88' GL right now installed in year
2000. He confessed that this had him stumped. He starts tomorrow, even
though it's New Years, disassembly piece by piece to find the problem. I'm
sure he will, but how far down he will have to go as anybodies guess!

John
On Dec 31, 2015 04:30, "John Rodgers" <jrodgers113@gmail.com> wrote:

> Engine turns beautifully by hand on the bench. Put the new AMC hesds on
> with all parts assembled, torque them down,  and the beenengine won't turn.
>
> Removed the heads twice, still no joy. Sounds like a valve stuck in a
> guide to me.
>
> Any body else ever had this problem or got an educated opinion?
>
> Thanks.
>
> John
>