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  #1  
Old 07-01-2005, 10:21 PM
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Join Date: Jun 2005
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M104 Valve Cover Tightening

Hello all. I recently replaced the valve cover gasket on my 1990 300SL and got a few leak spots on the valve cover. Does anyone have a diagram of the bolt tightening sequence and the corresponding torque? I've tried to search here but couldn't find anything on this topic. Thanks.
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Old 07-01-2005, 11:20 PM
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Join Date: Aug 2003
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Haynes just says tighten the "progressively" to the specified torque - which is just 7 ft. lbs. Are you sure you got the contact faces clean? Seems unlikely you undertorqued them at just 7 lbs.
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Old 07-02-2005, 05:55 PM
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Join Date: Mar 2004
Location: Flower Mound, Texas
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R1990 - I had a fit with this too. Ended up needing the rubber grommets for the valve cover bolts. You won't believe how much your originals have compressed over the years. I probably pulled the valve cover two or three times before I figured that out. I want to say I also used a bit of MB sealant in the valve cover channel before attaching the gasket --- just a tad. No leaks since. Good luck --- oh yes, just tighten with a 1/4" nut driver by hand. Doesn't take much torque. Just go in two or three stages and do in any crisscross pattern. 71Rcode
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