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1968 250S, 1974 280 CE, 1988 560 SEC, 1993 300SE, 2001 S430
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63 Posts
Discussion Starter #1
Hi guys, I'm owner 1993 S320 engine M104.990 I buy this car with oil leak from head gasket. From 2 weeks with my friend (mechanic) we try fix my engine. We remove head, clean block, plain head (new steam seal), VRS kit are install. Engine was pull apart so I do more work as new chain, distributor, leads, spark plug, new front hose, most seals are replace.

Now horror begin we have problem with front seal between timing cover top and bottom part. Seal was inside VRS kit so we fix new one. Unfortunately was not work best for as. After 5-10 min after restart engine we find leak from from this seal.

we spend another 5h to pull apart clean fix again this seal with small amount of silicon at end. Another try same result oil leak . I got another new seal today morning so I will try again tomorrow. When i look at all 3 seals looks like all 3 are 2-3mm smaller length + deep. That is normal, those seal need to by stretch ??

I read people have loot problem with those seal

Discount Mercedes Timing Cover Seal Strip - Mercedes Parts Wholesale


Please help
What I doing wrong ?

Mario
 

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Registered
1998 S320LWB
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660 Posts
Getting the front top timing chain cover seal on properly is tricky and requires practice. You are to use the proper RTV sealant on the vertical surface of the seal only. Also, when replacing the timing chain cover you must do so without dislodging the seal (that is the tricky part) since the cover has to go on horizontally for the chain guide and vertically for the seal lip. Good Luck.
 

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Registered
1968 250S, 1974 280 CE, 1988 560 SEC, 1993 300SE, 2001 S430
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63 Posts
Discussion Starter #3
Hi I use same silicon as with all engine parts. Grey Wurth he is engine silicon -50 till +250 degreas C.
I have another idea with fit just silicon with out those gasket. Wait 2-3 day for full dry.
Mario
 

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Registered
'84 300DT, '97 S320
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682 Posts
Hello, Mario here is a web site that describes the head gasket replacement, and timing cover seal, and a small green seal (Pic 10).

I'll look for other gasket sites, but this is pretty good.

MERCEDES-BENZ: Head Gasket Replacement



Also, that timing cover seal web site does not show any matches for the S class.


Also, your 1993 should have on the trunk "300SEL". In 1994, MB stopped using letters on the right side, and started using letters on the left side. From 1994, then it would be "S320". So maybe yours is not a 1993 ?

Dave H
 

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Registered
1968 250S, 1974 280 CE, 1988 560 SEC, 1993 300SE, 2001 S430
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63 Posts
Discussion Starter #5
Hi guys,
Thx 4 info finally work. Engine is seal no leak.
Becouse is 1993 car have problem with harnes. Both upper and lower harnes are rebuild and still I have issue with some electronic. (ABS is kiking with no resone, cruise control is switch off above 80 km, I can hear in my speakers when gearbox changing gear)

Seriously I don't have any idea what to do. Car have so many ground point I check some at front, back and fat cable under car. All looks good. I know is more but I have to remove loots parts to look there.

Any idea ???

Mario
 
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