Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 05-07-2002, 01:37 AM
MBCA Concours Judge
Join Date: Mar 1999
Location: Canfield, Ohio
Posts: 34
Question 450 SL - Valve cover seals

Is changing the valve cover seals on a 1974 450 SL a difficult job?

I have only done one other valve cover seal job was on my 1966 Mustang and it was easy.

Last (probably dumb) I need to drain the oil first?
On the Mustang I did not have to....these valve covers look deeper though.....

Thanks for your help!

1974 450SL 99K miles
1996 C220 142K miles
MBCA Concours Judge
Western Reserve Section
Reply With Quote
Old 05-07-2002, 02:15 AM
MikeTangas's Avatar
Senior Member
Join Date: Apr 2000
Location: So. Cal
Posts: 4,430
Hmmm...let's see. Remove air cleaner assembly. Remove four 10mm bolts on each valve cover and lift.

Now comes the hard part. Peel off the old seals, which are probably hard as a rock and thouroughly clean the mating portion of the cover. Next thouroughly clean the mating surface of the head, be sure there is no oil what so ever on the mating surface. Pop the covers back into place.

Now the hardest part. Tighten the four bolts enough so they don't leak but not so tight as to cut the new seals. I don't know what the torque for the cover bolts is so I use a 1/4" drive rachet and just snug them up. Haven't had any leaks from the two V-8's I've been into.

No, you don't have to drain the oil. While you have the covers off you should check and adjust your valves while you're in there though.
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon least its a diesel

Non illegitemae carborundum.
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 06:40 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page