Hi, welcome to the forum. I am up north in Cicero, along the east shore of the mighty Morse Reservoir - center part of God's Country. Anyway, do check that noise out. It is a pain to take the belts off and listen, but at times it is a must. Both a tired vacuum pump or a worn and (dare I say loose) big nut on the vibration damper are problems well worth looking at when you are looking for strange rumbles. If it continues whole the car is not moving, eliminate the driveline - it is not the problem. It could be bad motor mounts, so flat and oil soaked there is really no support left and then you could be getting a vibration that resonates through the engine area.

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Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!