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Old 11-10-2000, 12:14 PM
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Join Date: Nov 2000
Location: Los Angeles, CA/ Hilo, HI
Posts: 92
My 85 190E developed a loud tapping/knocking noise that seems to come from somewhere under the valve cover in the area of the last cylinder(#1) and is loudest on the intake valve side. I changed the lifters and the rocker arms as well as the camshaft but the noise only got worse after the following oil change. The noise appears once the engine has warmed up. No noise when it is cold and warming up. I talked to the mechanic who rebuilt the cylinder head before I got the car and he suggested it might be piston slab?!. I would very much appreciate any suggestions on how to proceed to get rid of the noise. Thank you very much in advance.
Felix Lahme
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Old 04-14-2001, 12:32 AM
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Join Date: Apr 2001
Location: Doylestown, PA
Posts: 124
Ditto, I am having a similar noise. Any ideas?
1988 190E 2.3 (178,000)
FastLane, PartsShop and this forum rule!!!
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Old 04-14-2001, 02:27 AM
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Join Date: Nov 2000
Location: Los Angeles, CA/ Hilo, HI
Posts: 92
tapping noise on 190E

Hi there,
so far no solution to the problem.
You are the only one who has replied to this post so far as well.
Looks like nobody has a clue what it could be.
Maybe you'll have more luck finding a solution.

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Old 04-14-2001, 02:44 PM
Posts: n/a
Tick, tick, tick noise

Not sure if this engine uses thrust washers over the valve stems, but these are supplied in different sizes. The thrust washers are used on most V8's, hydraulic and solids.

You may want to check the noise with the valve cover off to pinpoint the valve or valves in question.
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Old 04-14-2001, 10:43 PM
Posts: n/a
Since you change the fol:
1.Rocker arms
Did you adjust the valve lash properly? Metal expands
when heats up.
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