100171 Idler Pulley
FEBI 100171 Idler Pulley for auxiliary belt, with bolt
Category |
Engine / Belt Drive / Idler And Guide Pulleys |
Mercedes |
642 200 20 70, 6422002070 |
The crankshaft begins to oscillate back and forth at high frequency, especially at low engine speed, as a result of torsional vibration caused by the engine's power impulses. The vibration would be carried through the auxiliary belt drive system without a dampening effect, which could result in early component failure.
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