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#1
12-19-2005, 02:39 PM
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560SL - Can Risilone Cause Pinging?
Bizarre question, I know, but ...
Last week I had new axle shafts installed in my 160K 1987 560SL. I also had the oil and filter changed with a quart of Risilone to see if it would quiet down the lifters. Now I have a rattle on light acceleration that sounds to me and the tech who did the work like pinging. It only occurs on light acceleration when there would be high vacuum - like coasting at 35 mph and giving it a little gas. It does not occur under heavy load or hard acceleration. The timing is showing 14 deg BTDC with vacuum, which is in spec. I have no reason to believe that the timing has changed. The rattle continues after a fresh fill-up with high-test.
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Chuck Taylor Falls Church VA '66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe 
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