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- An oil pump gear failure likely has nothing to do with this. If you notice, the fractures begin at the edges of the gear where the crank galls the gear with age. I have seen this galling a lot and I suspect it is the source of damaged oil pump gears.
- I have seen several applications now of a LW pulley without a problem. A least one track vehicle with several seasons of usage, and one street car with high miles with them have had no trouble with oil pump gears or bearing failures.
Two key things here:
- oil pump gears should be changed frequently when used for sustained periods at high RPMs
- accessory belts should NEVER be overtightened
- oil pressure MUST be maintained
I'm convinced that these three things contribute to the failures that are typically contributed to LW pullies.
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