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No Steenkin Preevileeg
664 Posts

Is your whole engine/drivetrain still covered under OEM warranty with that 19% pulley?

reason I ask is that others who've installed 19% reductions or greater have cavitated and blown their water pumps, >ahem< warranty-void $1,100 water pumps >ahem< :eek:

I'll look around for the thread that discussed the effects of smaller pulley reductions among other engine parts that are also spinning and moving faster. Yet if BMW and JCW have certified that 17-19% reductions are OK, I may have to rethink any more than 15%.

Did your dealer install the kit? Jimbo
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