1990 Other Mercedes Benz Models

Tiny
NIKOLA JERAMAZ
  • MEMBER
  • 1990 MERCEDES BENZ
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 164,587 MILES
Car is Mercedes 300E 6 Cyl.
Very recent overheating. Warped cylinder. Head.
Head surfaced, new valve guides and valve ground.
After assembly, immediate valve lifter clatter. Checked valve timing OK. Cleaned hydraulic valve lifters and assembled, towers torqued and started again. Clatter still present. Loud like diesel.
Is it thrue that new lifters are needed?
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No
Tuesday, March 18th, 2008 AT 1:01 PM

3 Replies

Tiny
JACK42
  • MEMBER
Shouldnt have to replace the lifters. Is it oiling the top end of the engine? Did you compare head gaskets to be sure there arent any differences? If it is oiling the top, I would let it run for a while to see if they pump back up. Did you do an oil change at the same time?
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Wednesday, March 19th, 2008 AT 11:11 AM
Tiny
NIKOLA JERAMAZ
  • MEMBER
Thank you for callback.
I, ll answer your questions as they are posted.
Since water entered oil pan ( due to head heat distortion ) it got mixed and blended with engine oil and in any case had to be changed. In the same time the oil filter has been changed new.
The head gasket has been checked and compared to the old one. Both head gaskets (old and new ) are Mercedes original Head gaskets. The followers did oil on top while cranking engine and entire top was lubricated trough top oil manifold or oiler. After checking oil flow, valve train was cowered and engine started and immediately noise started. Several time engine was stopped running and restarted for longer time until coolant temperature reached normal level ( 82 dgr C ) then stopped. The oil change was done prior engine start.
Is it possible that upper part of head has remained warped and the camshaft is biding in cam bearings?
I am planning to get new hydraulic lifters. Some car dealer mechanics suggested that as possible
cure.
Man, is that getting very expensive. I do hope you have a good solution for me. Thank you
Nick
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Wednesday, March 19th, 2008 AT 12:25 PM
Tiny
JACK42
  • MEMBER
I suppose it is possible if the machine shop didnt check the cam to see if it spun freely in the head. I have seen lifters that once removed wouldnt pump back up, but it is rare. It is a Benz, so expensive will come with the territory
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Wednesday, March 19th, 2008 AT 1:56 PM

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