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SL/R230: Help with oil leak

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Old Jun 23, 2021 | 03:54 PM
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'01 CLK 430 cab, '04 SL500 (230K miles)
Help with oil leak
Can ya all gimme some guidance here. I have an oil leak somewhere and I can't find it. The top half of the engine looks good, I've replaced the valve cover gaskets and no leaks there. I've looked at the two round plugs in the back of the engine, nothing there. Can't see any oil looking down from the top of the engine anywhere. Can't really see where the oil is coming from when looking up at the engine. Car has 166k miles.




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Old Jun 23, 2021 | 04:28 PM
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2005 SL65 AMG
Rear crankshaft seal?
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Old Jun 23, 2021 | 05:39 PM
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'01 CLK 430 cab, '04 SL500 (230K miles)
I hope not, how can I tell?
Edit: If it was a rear crank seal, would I have oil under the oil pan?
Last edited by marko69; Jun 23, 2021 at 05:42 PM.
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Old Jun 24, 2021 | 11:08 AM
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SL500
I had that issue and the rear seal was suspect. However it turned out to be valve cover gaskets. And yes oil would collect there from either place.
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Old Jun 24, 2021 | 11:56 AM
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The best way to trace it is to use ultraviolet dye in the oil and then use a black light to find the origin.
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