The thrust measurement is determined by measuring the thickness of the last main journal on the flywheel end of the engine.
Air cooled vw thrust bearing.
Main journal thrust is the final measurement that must be performed when sizing your air cooled vw main bearings.
Includes 6 shells to do 1 engine.
If they aren t be prepared to make another trip back.
If your machine shop specializes in air cooled vws they may have a set of main bearings ready.
How to measure you aircooled vw main bearing set.
The stock measurement for thrust is 0 864 and it can be cut as much as 0 080 under.
Oversized thrust bearings are typically offered in 1 and 2mm os versions.
So you may have heard people in the scene referring to end float and engines being worn out with excessive play.
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It s important to note that each thrust bearing will have a bearing tang on it.
Here s a neat trick to save your air cooled vw engine block when the thrust had been knocked out and a double oversize thrust bearing won t work.
This is a really good idea to use on any engine that uses stiffer than stock valves prings or uses a bigger than stock camshaft.
Generally machine shops will cut down the engine case at the flywheel side to perfectly match an oversized bearing.
Stock vw cam bearings only had 1 thrust bearing this set provides 2 to halve the thrust bearing wear.