[T3] Checking a Case for Warping

[Jim Adney]

On 25 Jul 2013 at 23:20, Jeremy Menzies wrote:

> I'm in the process of rebuilding an original '71 motor for my
> Squareback and I thought I'd poll the list for some advice on checking
> the case for warping.  

Warping of the case is pretty unusual, so it's not something you 
would normally worry about. The only times I've seen it were when 
some of the 6 nuts on the main bearing studs had fallen off and 
allowed the case to spread under the forces exerted by the crank.

You can check for this by bolting the bare case halves together dry, 
and then using a thin feeler gauge to see if there is any gap between 
any of the main bearing saddle halves. You really don't need to 
torque all the bolts, just the 6 main bearing nuts and a few studs 
around the #4 bearing.

If there is any gap, it will probably be in the #2 bearing. RIMCO 
used to be able to add a shim in there and then align bore the case 
and save it.

In my experience, I generally worry more about wear in the bores for 
the cam followers. Rimco also used to be able to sleeve those, but 
I've never had that done.

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