Terrible noise
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Newbie
Joined: Jan 2016
Posts: 3
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Mercedes W203 2.7 CDI, 2002, Manual
it's sound like valve lifter ? it's not too loud ? My car mechanic said it could be piston or bolt/pin in piston, camshaft, or "pan" ? Could it be something like that ? Sorry for my english, I hope you understand me 
I belive in this forum
ps. I'm not mechanic, I think valve lifter sounds more "softly". Noise in my car is "hard". Like hitting with hammer in something hard. But maybe you have right.
I belive in this forum ps. I'm not mechanic, I think valve lifter sounds more "softly". Noise in my car is "hard". Like hitting with hammer in something hard. But maybe you have right.
Last edited by Minoo; Jan 12, 2016 at 05:26 PM.
Junior Member
Joined: Feb 2007
Posts: 49
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From: 3rd rock from the sun
C230 SC 2002 White 1992 Toyota Hilux 225,000 miles, 2017 Subaru STI
Almost as bad as this.
Super Member
Joined: Mar 2012
Posts: 968
Likes: 62
From: San Francisco, CA
2005 c230SS
Back to the valve tap ... here is a video that illustrates a bad crankshaft bearing and how to check for it:
I still think your noise sounds like a valve tap based on the thinness of the sound. If it was a solid knocking sound I would suspect crankshaft/rods. But I may be wrong ...
I still think your noise sounds like a valve tap based on the thinness of the sound. If it was a solid knocking sound I would suspect crankshaft/rods. But I may be wrong ...
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Member
Joined: Sep 2012
Posts: 151
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From: Laguna Beach, CA
2024 E 350
Sounds to me like a bad rod bearing. What you can do is while it is running, get a pair of plastic pliers (used just for this purpose) and pull out each plug wire one by one (put wire back after each one). If it is a rod bearing the noise will quiet down when you get to the bad bearing since now there is no compression load on the bearing.
Let me know the outcome.
Let me know the outcome.
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