Thread: Top end knock
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Old 06-16-2000, 11:41 PM
TommyMB TommyMB is offline
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Join Date: Nov 1999
Location: Lynnwood, WA, USA
Posts: 178
My 500SEL was making loud tapping noises. It turned out to be two loose lifters. After the lifters were retorqued, all noises disappeared. The tapping started after I have switched to Mobil 1. I wonder if the lower viscosity somehow loosened the bolts.

[This message has been edited by TommyMB (edited 06-16-2000).]
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