Noisy Lifters
Thread Starter
Junior Member
Joined: Dec 2004
Posts: 23
Likes: 0
From: Sequim, WA
2007 S550/1990 300CE
Noisy Lifters
I just had the 24 hydraulic lifters replaced under warranty on my 2004 E500 at
5800 miles. They were very noisy. The new ones are quieter, but still noisy. It
is most noticeable under moderate acceleration, or uphill while under more throttle to maintain a constant speed. Has anyone had a similiar problem?
What was the fix?
5800 miles. They were very noisy. The new ones are quieter, but still noisy. It
is most noticeable under moderate acceleration, or uphill while under more throttle to maintain a constant speed. Has anyone had a similiar problem?
What was the fix?
MBWorld Fanatic!
Joined: Dec 2003
Posts: 1,586
Likes: 1
From: Sacramento
'08 AM Vantage V8 - '03 E500
I may be showing my mechanical ignorance, but does a SOHC engine like the one in the E500 even have lifters? Rocker arms, maybe, but lifters?
The noise you describe sounds like predetonation, a/k/a "knocking." Are you using 91-octane fuel?
The noise you describe sounds like predetonation, a/k/a "knocking." Are you using 91-octane fuel?
Thread Starter
Junior Member
Joined: Dec 2004
Posts: 23
Likes: 0
From: Sequim, WA
2007 S550/1990 300CE
noisy lifters
The work order calls them valve lifters. I believe they are on top of the valve
stem, under the cam lobes and the the rocker arms. They were "sticky" and
all were replaced. Now the symptoms are the same as before, just not as loud.
Premium is 92 octane here. The car has seen nothing else.
stem, under the cam lobes and the the rocker arms. They were "sticky" and
all were replaced. Now the symptoms are the same as before, just not as loud.
Premium is 92 octane here. The car has seen nothing else.
Member
Joined: Nov 2001
Posts: 216
Likes: 1
From: Albuquerque
2003 E320
All recent USA Mercedes have hydraulic lifters. They may not actually “lift” but they are still called lifters even though they may push instead. They adjust the valve clearance automatically so valve adjustments are not necessary. They expand using oil to get essentially zero valve clearance. Sometimes the oil may leak out, especially when the engine is off, and the lifter will be noisy until it pumps up again which is usually a few seconds. Sounds like your problem is more than that.
MBWorld Fanatic!
Joined: Feb 2002
Posts: 6,061
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From: 2000 ft over the FL coast in a B-17
Various
1) Did you have the motor mounts changed?
2) All of the modual MB engines has been making since 98 have noisy valvetrains compared to the previous dohc 4 valve ones.
2) All of the modual MB engines has been making since 98 have noisy valvetrains compared to the previous dohc 4 valve ones.
Thread Starter
Junior Member
Joined: Dec 2004
Posts: 23
Likes: 0
From: Sequim, WA
2007 S550/1990 300CE
No. I did not have the motor mounts replaced. I will ask at my next dealer visit.
Did not know about the history of noisier valve trains. Thanks much for the input.
Did not know about the history of noisier valve trains. Thanks much for the input.
