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 11-18-2003, 07:32 PM
420benz's Avatar
Registered User
Join Date: Jul 2001
Posts: 961
Need good additive!

I have one niosy lifter [only when cold] and would like to add a cleaner to the oil. Any suggestions?

Reply With Quote
Old 11-18-2003, 08:02 PM
Mike Murrell's Avatar
Registered User
Join Date: Feb 2000
Posts: 2,574
I may stand corrected and please do if I'm wrong, but I was under the impression that the 420/560's had adjustable valve clearances?

If so, have you tried that?
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
Reply With Quote
Old 11-18-2003, 08:11 PM
Posts: n/a
Probably a bad lifter period. I wouldn't worry about it. There are some additives out there, but the only legitimate co. that comes to mind is "Lucas". I'm not sure if they make a detergent though.

Threre's a million opinions on additives, so no flame intended.

When it's cold and my car has been sitting for a day or so, it will make lifter noise for a few secs. I ran a detergent (name escapes me) and did nothing.

The valves on the M117 aren't adustable.

Also, how many miles? My clatter started at about 90k in near 0-15F temps.
Reply With Quote
Old 11-18-2003, 11:06 PM
420benz's Avatar
Registered User
Join Date: Jul 2001
Posts: 961
The heads were rebuilt last year about 10,000 mi. ago.I do not know how to adjust the valves on this car. I think they installed new spaces???? Car has 176,000 mil,s
Reply With Quote
Old 11-19-2003, 12:05 AM
Registered User
Join Date: Jul 2002
Posts: 197

Have you had the timing chain rails and tensioners checked. At every 100k this should be checked and the rails/tensioners replaced. You don't want the rails to break and cause the chain to jump and cause major damage. Just a thought.
Reply With Quote
Old 11-19-2003, 12:44 AM
afmcorp's Avatar
Registered User
Join Date: Jan 2002
Location: NW Indiana LaPorte
Posts: 571

if the tapping is continuous then you need to be concerned and open the valve covers now before damage can be done to the cam & rocker arm. if the tapping is left alone it can progress and possibly damage the cam. if it's only on startup then disappears in a few seconds maybe just maybe adding a detergent may work

mechanically if it's only a valve compensating element (ball stud or lifter) then for 30$ you can fix it. plus 5$ for the valve cover gasket. a cam costs about 275$ plus 8 new rocker arms etc:.

if you want to try the detergent route try either Marvel Mystery Oil or Rislone would be what i would add. run it a few miles maybe 50 if the noise does not disappear then it's mechanical and needs to be addressed.

i had this exact thing happen on my 88 last year and i left it tap away and it cost me that cam. all over only 1 ball stud.

good luck craig
Thanks Much!

1972 350sl Red/Blk 117k
1988 420sel charcoal/Blk 140k
1987 420sel gold/tan 128k
See My Cars at:

Pound it to fit then Paint it to match!

There is only First Place and Varying degrees of last!

Old age and deceit will overcome Youth and Enthusiasm every time!

Putting the square peg in the round hole is not hard... IF you do it fast enough!

Old enough to know better but stupid enough to do it anyway!
Reply With Quote
Old 11-19-2003, 12:48 AM
Senior Member
Join Date: Jul 2002
Location: visalia ca
Posts: 368
if yours is intermittant, then i suggest changing your
oil to mobil 1 15/50.
i have had huge success with this.
my shop uses mobil 1 15/50 almost in every car.
if after changing and the noise returns, then change
again. absolutely works.
but if you have some mileage on your engine, i would
suggest you check you cams and rockers for wear and
make sure that the oiler tube plastic connectors are tight.

Reply With Quote
Old 11-19-2003, 12:49 AM
Posts: n/a
I agree with Craig. My racket has gone on for too long (first owner?) so I'm sure head work is in order. Not pressing, but surely something to tackle if I want to keep the car.
Reply With Quote
Old 11-19-2003, 06:06 PM
420benz's Avatar
Registered User
Join Date: Jul 2001
Posts: 961
As i stated both heads were rebuilt including new rocker arms, valve guides,seals,chain,rails and tentioner.All lifters were checked at the time and were o.k As soon as i get valve cover gaskets from phil i will try to find out where the noise is comming from. Thanks for all your help.

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 02:06 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, 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