[T3] How's the trip going?

[Jim Adney]

Sounds like you've got the possibilities separated correctly. Tight valve 
problems have to be in the head, including the valves. Can't be anything 
else in the valve train, as wear there just makes for loose valves. That 
includes the cam and the head studs.

Afterthought: If the head studs had loosened, allowing the jugs to move 
around, they can dig into the case, which might make for tight valves. Seems 
unlikely, but you should be able to see that easily, and you would have 
noticed the loose head stud nuts.

Put a straightedge across the ends of the valves to see if they all end up at 
the same level. I thought I remembered that Es and Is were slightly different 
lengths, but Bentley shows both to be 112.00 mm OAL. See which ones stick 
up a bit more, but all of this gets messed up by a typical valve job. Still, you 
might learn something by comparing what you see at E3 compared to the 
other Es.

If your straightedge is long enough, you can check its clearance above the 
valve cover sealing rim at each end, to see if it's tilted.

I heard that Alex was bringing a set of heads for you. That's probably your 
best option at this point. Bring your old ones home for a post mortem later.

Jim

On 17 Jun 2022 at 7:13, john carartbyjohn.com wrote:

> We pulled Sophy's engine and tore it down to the point we could pull the
> heads. No obvious cause of the 3 exhaust valves tightening to the point I
> could not adjust them. Only causes of excessive valve tightening the brain
> trust here could come up with was valve stretch,  wear of the seating
> surface on the valve,  valve seat wear, or the valve seats pounding into
> the heads. Everything else would cause loose valves like bent pushrods, 
> pushrod end wear, cup wear on the sticker arm or lifter,  etc. Everything
> looked good with only expected normal wear.


-- 
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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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