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.
Air cooled vw thrust bearing.
If your machine shop specializes in air cooled vws they may have a set of main bearings ready.
Main journal thrust is the final measurement that must be performed when sizing your air cooled vw main bearings.
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.
Watch as john edwards costa mesa r d automotive.
Stock vw cam bearings only had 1 thrust bearing this set provides 2 to halve the thrust bearing wear.
Oversized thrust bearings are typically offered in 1 and 2mm os versions.
The thrust measurement is determined by measuring the thickness of the last main journal on the flywheel end of the engine.
Generally machine shops will cut down the engine case at the flywheel side to perfectly match an oversized bearing.
If they aren t be prepared to make another trip back.
We provide the classic vw hobby with tech tips project advice and quality parts for vw restoration vw performance and custom aircooled vw projects.
Theory behind thrust wear.
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.
This is all based around the main bearing wearing over a long period and developing a more sloppy fit in the journal the bearing sits in.
Includes 6 shells to do 1 engine.