The vanos is a known weak point for the e46 m3 s54 engine. We address preventative repairs by changing out the oil pump disk with a redrilled one from Beisan Systems as well as replace all of the vanos seals, hub sprocket bolts, spring diaphragms, various o-rings and gaskets, anti-rattle kit, and verify proper timing in this video series. http://www.beisansystems.com/ S54 Vanos Service Kit (Seals, rattle kit, tools + more) https://click.linksynergy.com/link?id=BZfgVZ7JGM8&offerid=580643.12440
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