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Camshaft drive 700 1989

posted by  someone claiming to be Rick Tull on  Mon Mar 26 05:29 CST 2001 [RELATED]

My daughter was driving our 740GL wagon when the thing quit. She experienced an oil light and overheating, not necessarily in that order.

When I got to the car, it would crank, but there was no compression.

I pulled the timing belt cover off and discovered that the timing belt was intact but was not turning when the engine was cranked. The accessory belts were turning, which means that the timing belt crankshaft sprocket must have sheared its key.

Has anybody out there ever heard of this? I figure that the camshaft must have frozen in its bearings, but can't figure how the sprocket key could fail before the belt itself.

As soon as it warms up a few degrees, I'll go out and see if I can turn the cam with the camshaft sprocket bolt. I suppose that it could be that the water pump has siezed I guess.

I'm still baffled by the fact that the sprocket on the cranksaft isn't turning.





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