Stuck Sump Nut

design guru

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The sump nut on my C240 W202 is stuck! It looks like the last owner attempted to undo it and damaged the outside so now not even a spanner or socket will fit properly.

Any ideas or suggestions?

I want to do an oil change and I have a new sump nut to replace but removing the original is the problem.
 

artyman

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Cut a slot and use a big screwdriver. Heating it may help as well.
 

NW_Merc

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Just adding to what Ian has just said, the bolt extractors are worth their weight in gold. However you will need to remove the bolt from the extractor socket with a pair of pliers and replace the sump nut with a new one.
 

R.Sendout

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I did an oil change on mine yesterday and the sump bolt was silly tight. I would highly recommend the use of a 6 sided socket for doing this as the bolt used is quite soft.

I know this doesn't solve your problem but I have also found the Irwin extractors very good, although not a guaranteed solution.
 

Harrythedog

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design guru

design guru

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Joined
Feb 28, 2004
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437
Location
Hampshire
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2001 W220 Mercedes S320cdi
Took the weld option as I new a guy who helped me out when my wheel locking nut was damaged. He did say that even if I got the bolt extractors I would have probably had a job removing them as the nut was on so tight it took him 3 welds and it final gave way.

Thanks for all the suggestions.
 

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