[T3] motors coming out!

[Jim Adney]

On 1 Aug 2018 at 22:18, Keith Park wrote:

> I need to check the end play, the jug set was fine with the last build, I
> dont think its that,

If you replaced the rings, they could be the problem. It could be due to dirt in 
the groove under the new rings, or it could be that the new rings did not have 
sufficient gaps.

I once got a set of rings from Berg that had not been gapped at the factory. I 
don't remember the details; IIRC it was just one of the rings for each piston, 
possibly the top compression ring. I had neglected to test each ring in a 
cylinder bore for fit beforehand, so when I forced the cylinder over that ring it 
split the cylinder. I couldn't believe that this could happen, but it did.

I've also had engines where I was careless about cleaning out the ring 
grooves on a rebuild, so that there was engine crud in the bottom of the 
groove that kept the ring from going all the way in. That crud had built up 
because the old rings were worn, leaving room underneath them, but the 
new rings needed that room.

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