Engine Tapping
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MBWorld Fanatic!
Joined: May 2002
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From: Hell
EFF YOU JACKIE
Engine Tapping
Guys,
Need help. Last couple of weeks I have been noticing a tapping noise at rest either when in park or in gear, and I asked the dealer. They said that it was some carbon release valve BS. What I want to know is, if this is a function of the vehicle, why does it do it all the time. AND, doesn't that mean that there is excessive carbon build up and something is wrong????!?! Help..
Need help. Last couple of weeks I have been noticing a tapping noise at rest either when in park or in gear, and I asked the dealer. They said that it was some carbon release valve BS. What I want to know is, if this is a function of the vehicle, why does it do it all the time. AND, doesn't that mean that there is excessive carbon build up and something is wrong????!?! Help..
Junior Member
Joined: Nov 2003
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You didn't say if the engine is running or not. I will assume that it is. My friend had the same noise in his E class and his ML, and was told by several dealers that it was in the fuel injection, and that it was normal.
Junior Member
Joined: Nov 2003
Posts: 66
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I wouldn't sell it just for that reason, It isn't hurting anything, If in fact we are talking about the same thing. The noise I am referring to, is not really very loud, at it's loudest, and you have to be outside of the car to hear it. Is that how your's is?
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MBWorld Fanatic!
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From: Orlando
E550 Coupe
my car does it. its not THAT loud but it seems to come from the front?? i dont go to the dealer for service, i have a hungarian guy who knows euro cars like the back of his hand...he usually tells me when the car's gonna die or not and hasnt said anything about this.
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Senior Member
Joined: Feb 2002
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From: SF Bay Area
'05 E55
I had mine checked out and I was told by several MBZ mechanics that the newer generation engine blocks are made with thinner walls so they commonly make more noise and the tapping sound is a typical by product of that. My does it too.
Member
Joined: Dec 2003
Posts: 95
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From: Baltimore, Md
2005 SL500
I also have the sound, I always think there is something wrong with the car because I just bought it, but MB told me it was the fuel injectors making the noise and that it was normal. It doesnt do it all the time, so I wonder; How can that be normal???
Rick
Rick
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From: 2000 ft over the FL coast in a B-17
Various
If the sound is intermitent it is a small valve in the engine compartment on the drivers side. Yes it is noisy and MB should have done a better job isolating it but it is normal and not harming anything. If the sound you guys are hearing is the constant tapping sound that's more than likely the valvetrain and that's too is normal. MB swithed to the modular type engines in MY 99, they are much noisier than the former DOHC 4 valve design. Although the newer modular engines are torquier (both a flatter curve and at lower revs) they saved MB about 50%, yes 50% over its predecessor. Cost cutting is so great isn't it?
MBWorld Fanatic!
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From: 2000 ft over the FL coast in a B-17
Various
Originally posted by kimber45
My tapping comes out of the left front most section of the engine compartment.
My tapping comes out of the left front most section of the engine compartment.
