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  #1  
Old 05-05-2001, 01:34 PM
450 SLC 5.0
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RE: M-117 V-8 engines (either aluminum or iron)

Iíve searched the archives, but I canít find anything on a way to isolate a single noisy/leaking hydraulic lifter/compensating element. Any suggestions or methods would really be appreciated. Thanks in advance for your help!
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Old 05-06-2001, 11:31 PM
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Join Date: Jan 2000
Location: New Bedford, MA USA
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Well can you isolate it to one side or the other. If you can, then you have narrowed your choices to 8 possiblilties. Try using a long piece of metal rod on the valve cover and the other end pressed near the front of your ear. Better yet, either borrow or buy a mechanics stethoscope and use that to try and locate the offending parts.
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Old 05-06-2001, 11:51 PM
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I do not know if this can be done on a Mercedes but on the other cars that I have been working it is done as follows: The valve cover is removed and the engine starts and idles (with the valve cover still removed). Then, get a .020 inch feeler gage and slip it between each valve tip and rocker arm. When you get to the one with the bad lifter the noise should change markedly.
Now I am not sure if it can be done in a Mercedes but all the cars I have been working on (primarily domestic V8) that is how we do it. Hits the target every time.
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Old 05-07-2001, 01:58 PM
brastar
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I have found a stethascope is the best solution for this problem. I use mine for alot of diagnosis (vacuum leaks,noisy belts ect...)I think every good mechanic should have one. Good luck.
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