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Old 12-05-2003, 09:07 PM
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Join Date: Sep 2002
Location: Atlanta
Posts: 232
Oil pan Gasket leak M104

How difficult a job to do an oil pan gasket? 93' 300E M104.

Just figured out where my oil leak was coming from, other than minor seapage from timing chain cover. Not a major leak, but I have a good amount of seapage on the drivers side of the car, resulting in a few drops in the garage every couple of days. Looks pretty straight forward. I also notice some oil below my oil filter, intake, and PS pump. I need to monitor this to determine source.

I searched the forum, but with no real luck.

I am a fairly ok DIY, just did all my shocks and struts, and swaybars recently, so hope this is doable.


Sportline Swaybars
Bilstein HD Struts
16" E420 wheels
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Old 12-06-2003, 10:03 PM
Registered User
Join Date: Sep 2002
Location: Kingsport, TN
Posts: 375
Hi Q-Ball

I don't know your car but I did mine on an '87 420 SEL.
They need little torqueing, I believe 8 ftlbs and in my case 2 bolts on the driverside have nuts on top which you have to loosen first. Otherwise the bolt will brake.
My torque wrench needed a calibration. It was clear when the gasket split before I ever got to 8 ftlbs.
Clean the mating surfaces well, oil the gasket well and watch for splitting.
Maybe somebody with your motor will chime in if different.

Good luck

Reinhard Kreutzer

Last edited by RKreutzer; 12-06-2003 at 10:10 PM.
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