AirSpeed VW Community Forums

Technical => Engine Tech Forum => Topic started by: egspot on January 02, 2006, 09:34:44 PM

Title: Engine Terminology
Post by: egspot on January 02, 2006, 09:34:44 PM

What do these terms mean?

.5mm align bore? Is this from the boring of the the block to 94mm?


1.0mm thrust cut? is this a cut at the flywheel side?


If the last is correct, do I have to use an oversize seal and what would this seal be called and what size should it be?


Emilio

Title: Engine Terminology
Post by: BUSDADDY on January 03, 2006, 06:46:32 AM

Align bore is enlarging all the bearing saddles to correct for case warpage, bearings are available in sizes to deal with this, just make sure all the saddles are cut the same amount, depends who did it, Iv'e seen VW Canada rebuilds that didn't touch #4. You would need two different sets of bearings to deal with that.
As for the thrust you need bearings with an o/s thrust as well, same seal as stock.