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Discussion Starter #1
Hi,

Need some advice. I recently noticed a loud tapping noise which was quite audible under light acceleration but could also be heard when stationary (but noy as loud)

The noise would work with the revs and not engine speed.

Took the car to the dealer, they had it for a month!!!!:eek: and changed the tappets. All seemed well but after a few days the noise has come back ...its not as loud but seems to be more of a ticking noise now (like ticker tape stuck in a fan)

Needless to say, I will have to call my dealer again today to get it booked in but has anybody had the same problem that wasnt tappets?

I think my dealer may need some pointers.

Many Thanks for any comments
 

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Sorry to hear that. That doesn't sound too good at all. Well, my first question is whether you had to pay for the first set of repairs or were they part of some warranty service. Did they show you the old items they replaced?
 

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johneurostar said:
Sorry to hear that. That doesn't sound too good at all. Well, my first question is whether you had to pay for the first set of repairs or were they part of some warranty service. Did they show you the old items they replaced?
Thanks for the reply.

Luckily I had third party Warranty...but had to pay 40%Labour costs which was £300. It would have cost me £1600 without it (touch!)

Anways, I am going back saturday morning for a road test so we can both have a listen before diagnostics.

They tried the Purge valve and it wasnt that.

I am not sure where we go with this really!?
 

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Fuel pump located under the rear seat. Noise is coming from the transfer of fuel from one side of tank to the other. This is what the dealership diagnosed mine.
Fuel pump replaced, purge valve replaced, noise still there. Apparently this is normal operation common on C32, C320 up to MY 2004.
 

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tomekay said:
Hi,

Need some advice. I recently noticed a loud tapping noise which was quite audible under light acceleration but could also be heard when stationary (but noy as loud)

The noise would work with the revs and not engine speed.

Took the car to the dealer, they had it for a month!!!!:eek: and changed the tappets. All seemed well but after a few days the noise has come back ...its not as loud but seems to be more of a ticking noise now (like ticker tape stuck in a fan)

Needless to say, I will have to call my dealer again today to get it booked in but has anybody had the same problem that wasnt tappets?

I think my dealer may need some pointers.

Many Thanks for any comments
does the noise comes from the driver side in the engine bay if so .. its the Purge Valve they need to replace it with the newer version ...it has like more rubber cushion so to make the tapping noise less or some crap like that.
 

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I also have a ticking noise on the driver's side engine compartment. It seems to be coming from some sort of valve with some plastic lines going to it. Funny, b/c I thought it was a lifter or cam at first, because it sounded real loud the first time I heard it parked against a wall at my local drive-up ATM. There is also a plug going to it.
It sounds like a dampened rubber metalic clicking.
 

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Discussion Starter #7
johneurostar said:
I also have a ticking noise on the driver's side engine compartment. It seems to be coming from some sort of valve with some plastic lines going to it. Funny, b/c I thought it was a lifter or cam at first, because it sounded real loud the first time I heard it parked against a wall at my local drive-up ATM. There is also a plug going to it.
It sounds like a dampened rubber metalic clicking.

...does it get faster as you rev the engine?

Thats what mine does :(
 

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I just bouhgt 2002 c32 and already have some problems unfortunately i dont have mb warranty.Anyway I have the same problem especially when u speed up it gets louder. I took the car germantech service they told me its a kompressor u dont have to woryy about it but its annoyinnnnn
 

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gs4life1905 said:
I just bouhgt 2002 c32 and already have some problems unfortunately i dont have mb warranty.Anyway I have the same problem especially when u speed up it gets louder. I took the car germantech service they told me its a kompressor u dont have to woryy about it but its annoyinnnnn

Interesting.....my place disconected the charger and it still made the noise so its not that.

What I will say, they did change the tappets and the noise is less audible but it is still there. There must be something around that area thats the culprit!!!!
 

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tomekay said:
...does it get faster as you rev the engine?

Thats what mine does :(
Mine does the same. I never had the problem until I took the car into the dealership to have the driver's heated seat fixed last week.

It is quite annoying and frankly, it worries me a bit. I keep thinking that something bad is about to happen. I'm going to have to bring it in again to have them check it.

However, this is not as annoying as the tranny jerk at low speeds. This car is breaking my heart...:crybaby2:
 

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has anyone found the source of this noise? I've been "ignoring" it for the past 4 years. My dealership never hears it and I just give up bringing it in.
 

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I also have a ticking noise on the driver's side engine compartment. It seems to be coming from some sort of valve with some plastic lines going to it. Funny, b/c I thought it was a lifter or cam at first, because it sounded real loud the first time I heard it parked against a wall at my local drive-up ATM. There is also a plug going to it.
It sounds like a dampened rubber metalic clicking.
I been hearing it too!
 

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Reading these posts sure is scary. Lucky for me I have a close friend who's a certified MB mechanic. He does most of my repairs at his home since he retired. Guys got a better garage than the dealership. Got another close friend working at BMW who'll be working on a 3 series i'm picking up later this week. I'm not a rich man, but I do ok. Still, if I couldn't spoil these cars, I wouldn't want one.
 

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uhh well is there any way that you might ask him about this issue? and obviously post a reply for us? We would really appreciate that. V
 

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Interesting you guys mentioned that tapping noise. I took my 2007 C350 into the dealer for a puttering, or sputtering noise that i hear at right rear end of the car. It sounds horrible, like my Benz sputters...like put put car. The dealer said it was that purge valve ,what you guys were talking about. He said it should shut off. I said mine never shuts off, or the noise never goes away. Then he said mine was a lot quieter than the older models. I'm thinking, this is why Lexus has the commercials based on how 'quiet " there cars run.

Does anyone else hear a sput, sput , or put put noise on right rear end of the car?

thanks

mh
 
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