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knock, knock 200 1977

posted by  Joe HC on  Thu Jul 24 01:36 CST 2003
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last visit: Sat Jun 21 08:19 CST 2008
[RELATED]

Greetings all-

My brick has been developing this knock that I am having great difficulty identifying; it has the B21F engine and about 150k miles. I am aware of the "piston slap" on the B230, but I am not sure that this would apply to the B21F motors. When I listen to the sound, it is defintely coming from the upper portion of the head, and it is the loudest immediately above piston #2. I can hear it well when I put my ear close to the manifold cover. I have made a .wav file of the sound:

http://www.geocities.com/aanippl/volvoknock.wav

Does anyone have any thoughts?

Thanks-

Joe HC






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