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  #16  
Old 03-30-2010, 09:47 AM
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Join Date: Dec 2007
Posts: 3,494
did you ever figure out what was causing the knock? your engine sounds
EXACTLY like mine (617) after installing new Monark nozzles, new valve
stem seals, new valve springs and new locking cap nuts. I'm still
chasing the problem.....
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1991 560SEL, 1984 300DT
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  #17  
Old 03-31-2010, 10:41 AM
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Join Date: Nov 2008
Location: Rockville, MD
Posts: 274
i pulled the cam and inspected the cam towers, lobes, springs, and valve nuts for wear or breakage. it looked just as good as it did when it was brand new. i adjusted the valves again and put the cam cover back on. the noise is still there at idle. i was told that it might be carbon buildup in the pre-chamber not allowing optimal atomization of fuel. the car is a screamer. very fast. does not burn or leak oil and it has amazing power. so i am at a loss.
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  #18  
Old 03-31-2010, 01:19 PM
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Join Date: Nov 2004
Location: Nova Scotia, Canada.
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It is not carbon buildup in the prechamber if the knock is still there with the injector disabled. I think you knew that but just in case.
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  #19  
Old 03-31-2010, 08:23 PM
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Location: Rockville, MD
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You are right. Still uncertain on noise. I had a friend tell me that it might be coming from the alternator.
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