Merc 350 engine knock..help!
#15
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I would pull the valve covers and take a look, probably comng out but. I would say lose coupler bolts, bent rod,or valvetrain. To me it does not sound like a rod bearing.
#18
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http://www.youtube.com/watch?v=K7Z8I0CvEVs
Sound familar? We did the same thing--pulling spark plug wires and couldnt isolate the problem. Checked the valvetrain as best we could and just couldnt locate the problem so the engine was pulled.
It ended up being the number seven wrist pin was bad and causing piston to score.
Sound familar? We did the same thing--pulling spark plug wires and couldnt isolate the problem. Checked the valvetrain as best we could and just couldnt locate the problem so the engine was pulled.
It ended up being the number seven wrist pin was bad and causing piston to score.
#20
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Join Date: May 2004
Location: Okanagan Falls BC. Canada
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\\\\why not just pull the valve cover and check if a rocker arm got loose hammering the lifter. Happened to a friend's 67 Mustang fastback recently. It started with the hammering I could hear driving next to him. Told him to pull over to the curb and pull the cover but he ran it for another 5 minutes and kaboom, rocker stud broke. Luck has it I still had some studs from a 429 at home, so I machined one down to accept his rocker, so we could fix it on the road taking the car home to check the whole engine later.