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Old 01-27-2002, 08:51 PM
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Join Date: Feb 2000
Posts: 171
Self-adjusting valves

Techs and mechanical gurus,

I'd like to know whether MB cars have self adjusting valves or not. When did this technology became mainstream? Which car makers have it? Any input would be greatly appreciated.

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Old 01-27-2002, 09:51 PM
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Join Date: Dec 2000
Location: St. Albert, Alberta, Canada
Posts: 3,492
Most MB gasoline engines have had "self-adjusting" valves for a long time. All of my gasoline MB's have had hydraulic lifters that automatically compensate for wear.

Most diesels have valves that require adjustment.
John Shellenberg
1998 C230 "Black Betty" 240K

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Old 01-27-2002, 10:12 PM
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Join Date: Mar 2001
Posts: 326
MB started using hydraulic compensators on the V8 in 1974.
The 6 cyl didn't see the hydraulics until the debut of the 103 engine.
The 4 cyl in the 190E was the first 4 cyl to use hydraulics also.
And the 60X series diesels were the first diesels to use the hydraulic elements. This info is for the US.
With the exception of exotic sports cars I would dare to say that practically all car manufacturers use some type of hydraulic compensating.
Scott Diener
89 300E
93 300E
92 Volvo 740 Wagon aka "Mutt mover"
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Old 01-27-2002, 11:00 PM
blackmercedes's Avatar
Just a guy
Join Date: Dec 2000
Location: St. Albert, Alberta, Canada
Posts: 3,492
A lot of Honda products require valve adjusting. I might be wrong, but I think even late model Hondas do.
John Shellenberg
1998 C230 "Black Betty" 240K

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Old 01-28-2002, 08:06 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
NO big deal but the 450s starting in 1976 were the first MB V-8s with hydraulic lifters. The last MB in the US that needed valve adjustment was the 1987 190E 2.3 16V engine.
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