Sounds like an extra vibration almost when the car is in the neighborhood of about 2500-3000 RPMs, believe it's coming from the radiator fan. Checking the fan I find no lose parts, the car isn't overheating, just an annoying sound. Anyone have any ideas?
thanks very much, Justin
1978 242GT, 1988 245DL
Take the fan off and test drive without it. The car won't overheat without the fan unless you get stuck in traffic.
Maybe that's how fast the electric fan turns and it has a slight imbalance in the fan blades. When the engine's rpm's are in phase with the electric fan, it starts shaking?
Just a guess.
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