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Whenever you over heat an engine there will be problems. One being that all of the parts in the engine get really hot and start to either bend or warp. The knocking noise can come from your valves or anything that attaches to your valves. You should check out your piston rings and pistons. Connecting rods, journals and bearings. But it usually isn't as deep as that. So i Would start with the head and work your way down. you either spun a connecting rod bearing, or a main bearing. I would go with the main. to put it simply. rebuild the motor. don.

2007-04-14 06:42:49
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