I just had the valve covers off this past weekend when I was changing the upper guide rails and all the oiler tubes looked fine. I did check each one to make sure the oiler tube was seated well. My model has the medal oiler tubes. I don’t experience infamous “lifter ticking lifter” noise, just the noise you hear just after you change the oil on the 1st start of the engine. I also only hear the noise after a warm start and after the car has been setting for a period and the event creating the noise only randomly occurs.

I did replace the oil filter housing valve with the updated version two weeks ago when I changed the water pump. I’m wondering if the new “valve” is performing as it should. Before reinstalling the oil filter housing, I made sure the spring in the valve worked and the valve returned to closed position.

This one has me scratching my head.

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Russell McMahon
Tulsa, OK
2001 CLK 320
1992 400se
1993 400e
2000 320ML