Engine knocking...help
Thread Starter
Senior Member
Joined: Jun 2008
Posts: 341
Likes: 6
From: Chicago, IL
2001 E430, 2002 ML55
Engine knocking...help
http://www.youtube.com/watch?v=LRIng...e_gdata_player
Well I noticed some slight knocking on the right (from driver seat) hand side of the engine block. It was happening before my oil change and now after the oil change (less then before). This knocking also only happens at idle I'm guessing because I only notice it when I stop at a light and feel a ticking in the front piller by the windscreen.
Any tips on how to fix this knock?
Thanks
Well I noticed some slight knocking on the right (from driver seat) hand side of the engine block. It was happening before my oil change and now after the oil change (less then before). This knocking also only happens at idle I'm guessing because I only notice it when I stop at a light and feel a ticking in the front piller by the windscreen.
Any tips on how to fix this knock?
Thanks
Super Member
Joined: Feb 2008
Posts: 502
Likes: 3
From: Bay Area
02 clk 55, 13 GL 450
Mine has a valve tic that comes and goes and seems to be a comon complaint. You wont, however, feel it in the "A" piller . With good motor mounts you shouldn't "feel" any knocking. Now if you really have a knock rather than a valve tic you may be in for more work. Rod knocks will get worse with revs and less at idle. You stated both "knock" and "tic" so not sure which one you have? What kind of miles do you have on the car?
Thread Starter
Senior Member
Joined: Jun 2008
Posts: 341
Likes: 6
From: Chicago, IL
2001 E430, 2002 ML55
the video should explain the sound to you perfectly haha i feel like something is hitting up on the block therefore isnt the engine mounts.
http://www.youtube.com/watch?v=LRIng...e_gdata_player
Miles on the car are mostly highway with some stop and go traffic Chicago style
http://www.youtube.com/watch?v=LRIng...e_gdata_player
Miles on the car are mostly highway with some stop and go traffic Chicago style
Thread Starter
Senior Member
Joined: Jun 2008
Posts: 341
Likes: 6
From: Chicago, IL
2001 E430, 2002 ML55
Nah, the purge valve is a ticking and from videos I've watched, sounds very faint. I believe mine is knocking because the amount of knocks increase with rpm rise. :/ not too happy if I have a piston or valve knocking.
Time for an AMG haha
Anyone also have problems with a high pitched transmission whine? I recently changed out the trans oil and just recently had a high pitched whine start...like i said, time for an AMG I guess
Time for an AMG haha
Anyone also have problems with a high pitched transmission whine? I recently changed out the trans oil and just recently had a high pitched whine start...like i said, time for an AMG I guess
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Thread Starter
Senior Member
Joined: Jun 2008
Posts: 341
Likes: 6
From: Chicago, IL
2001 E430, 2002 ML55
Mine has a valve tic that comes and goes and seems to be a comon complaint. You wont, however, feel it in the "A" piller . With good motor mounts you shouldn't "feel" any knocking. Now if you really have a knock rather than a valve tic you may be in for more work. Rod knocks will get worse with revs and less at idle. You stated both "knock" and "tic" so not sure which one you have? What kind of miles do you have on the car?
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MBWorld Fanatic!
Joined: Apr 2005
Posts: 3,784
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From: SCV SoCal
2002 CLK430
If you have rod knock, real rod knock, where "the bearing clearances are so over spec that the guy three houses down answers his front door when you start the car", no oil on earth is a long term fix. A rebuild, one sooner than later, is the only way to correct the problem.
I'm not saying this is you, but many people confuse collapsed lifters and/or the purge valve with rod knock. A few minutes with a stethoscope should narrow the problem down pretty quickly. That said, has anyone ever read a thread where the OP really had rod knock?
I'm not saying this is you, but many people confuse collapsed lifters and/or the purge valve with rod knock. A few minutes with a stethoscope should narrow the problem down pretty quickly. That said, has anyone ever read a thread where the OP really had rod knock?
Senior Member
Joined: Jul 2007
Posts: 268
Likes: 0
From: Long Island, New York
2002 Clk430
Ive had a transmission whine in 4th gear on acceleration and in 2nd gear on deceleration for 3 years now. almost two years ago I took the car to a mercedes transmission specialist indy shop and he basically told me to live with it after he serviced the tranny(fluid and filter change, new gasket, cleaned valve body, installed new spring in valve body thats known to fail, changed leaking o-ring, replaced a bushing inside tranny), but knock on wood still no problems with it other than the faint whine. If anyone knows of a quick cheap fix to this please let me know eg. different tranny fluid etc.
Thread Starter
Senior Member
Joined: Jun 2008
Posts: 341
Likes: 6
From: Chicago, IL
2001 E430, 2002 ML55
If you have rod knock, real rod knock, where "the bearing clearances are so over spec that the guy three houses down answers his front door when you start the car", no oil on earth is a long term fix. A rebuild, one sooner than later, is the only way to correct the problem.
I'm not saying this is you, but many people confuse collapsed lifters and/or the purge valve with rod knock. A few minutes with a stethoscope should narrow the problem down pretty quickly. That said, has anyone ever read a thread where the OP really had rod knock?
I'm not saying this is you, but many people confuse collapsed lifters and/or the purge valve with rod knock. A few minutes with a stethoscope should narrow the problem down pretty quickly. That said, has anyone ever read a thread where the OP really had rod knock?
