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Old 06-14-2004, 08:36 PM
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Join Date: Jun 2004
Posts: 8
Engine noise 380SL

My 1983 380SL is making an intermittant, muffled, knocking noise that appears to be coming from the lower part of the engine. Is this most likely a rod bearing? Can those bearings be replaced without an engine pull?

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Old 06-15-2004, 11:50 AM
Registered User
Join Date: Mar 2003
Location: Montana
Posts: 65
timing chain would be my first suspicion

pull valve covers and check the rails ...

if you need to get at lower end of engine I would pull it. My advice comes from working on 500 SEL so somewhat different but FWIW...

Good luck.

1984 500 SEL [131K]-
1991 GMC Sierra 4X4 XC [162K]- War Pony.
2004 Jeep Liberty Limited [8k]- wife's sled- Belle.
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Old 06-15-2004, 12:20 PM
Senior Member
Join Date: Jun 2001
Location: Northern Calif. (Fairfield Area)
Posts: 2,225
Highly unusual for a bearing to go out in a 116 or 117 engine unless someone has made a sacrifice to the oil Gods recently. By the way they rarely listen. What is the history on the car? You might have loose torque convertor bolts.


Auto Zentral Ltd.
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