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  #1  
Old 02-06-2009, 07:31 PM
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How to stop an oil after I put a new head gasket on?

I just finished up with my cylinder head on my '91 300 CE and cranked it up. I noticed a bad oil leak in the rear. Do I need to retort my head again? If so, do I loosen the head bolts and start over, or do I just try to tightened the rear bots and little more?
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Old 02-06-2009, 07:48 PM
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Check the valve cover...

Where in the rear is coming from...?
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Old 02-06-2009, 08:28 PM
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Sure its coming from the head gasket? Not the valve cover gasket or the freeze plugs? You follow the correct torque settings for the head?
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Old 02-06-2009, 09:28 PM
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you gotta find out where the oil is coming from, could be anything. if you went into this far enough where you did your own work i would suggest wiping everything underneath the engine with rags and gasoline and clean the underside up as best you can, then start the engine and let it run for a few minutes, shut it off and then get underneath and look with a keen eye, and good flashlight. If you have that giant pan underneath you have probably already removed it. on my 1990 300TE when i removed that pan i found dead bodies and parts of the titanic laying in there...a virtual mechanics graveyard of assorted tools, nuts and bolts. at any rate, you gotta be sure where this is coming from exactly, if it's that noticable it should be easy to find, but you gotta clean everything up first. can't tell where the soldier is shot and bleeding if there's blood everywhere....good luck
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Old 02-06-2009, 09:41 PM
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I followed the torque specs. 55NM then 90 degrees twice? Right?
It's dark now. In the morning I'll jack up the car and clean up the oil and see if I can find the leak. Hopefully its the valve cover gasket. I remember bolting down the front of the cover before moving to the back, instead of going around the circumstance.
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Old 02-06-2009, 10:25 PM
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if it's the valve cover gasket leaking you should smell buring oil off the exhaust manifold. that would be easy to fix....remember though, overtightening the valve cover gasket actually creates leaks. it goofy but true. after doing something as severe as a cylinder head job there are many opportunities for things to leak oil, from a loose fitting to leaking head to damaged seals. I have never done an MB but many BMW, a few VW, couple of Peugeot and a couple of Hondas and I have never had an oil leak from the head after such activity, yet I have, in fact, not tightened and/or overlooked minor reattachments in the re-assembly process. key point is, don't panic...work the problem....good luck
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Old 02-07-2009, 07:51 PM
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I've gotten closer with my oil lead, but still have a small leak around the distributor. I guess I'm going to have to get another gasket.
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Old 02-09-2009, 04:36 PM
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Well I finally got the oil leak stopped after the 5th try. Now I see another leak. I think it is the top timing cover.
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