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> Why the clutch disk was fouled: NOT the engine-to-transmission ("rear main") seal
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post Feb 11 2021, 08:45 PM
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Michael in Seattle
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BACKGROUND: I bought a car built by a confused retiree in SoCal. It had a big engine with the wrong camshaft for its displacement. The Dellorto carbs were sort of randomly attached. The clutch slipped a lot, despite it being pretty new. I theorized that the clutch had been contaminated by engine oil leaking past the engine-to-transmission seal, which VW guys call "rear main seal" because they put their engines on backwards.

It turns out the clutch was fouled, but not from the engine. It looks like someone had used a transaxle on its last legs, and that had leaked its fluid into the spinning clutch and pressure plate.

If you examine the right side of the photo you may see the radial lines the transmission fluid left on its way to ruin the clutch surfaces.

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