C32 AMG, C55 AMG (W203) 2001 - 2007

Ticking sound when on throttle..help?

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Old Oct 20, 2008 | 04:41 PM
  #1  
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C32 AMG
Ticking sound when on throttle..help?

As the title state above...i start to notice that recently when i step on the throttle...i hear a ticking sound ..only when on the throttle though. since when i let go of throttle the ticking sound disappear. i was wondering if it's the IC pump, but i had it replaced 3000 miles ago....i was had a new radiator installed recently..due to a leak..

does anyone know what might be up with it?

BTW. no CEL. so im clueless on where to start looking.

thank you!
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Old Oct 20, 2008 | 04:45 PM
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Mine does it. If its the same sound its normal.

A light ticking right....increases in speed as the rpms increase...?
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Old Oct 20, 2008 | 04:49 PM
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Originally Posted by 240M3SRT
Mine does it. If its the same sound its normal.

A light ticking right....increases in speed as the rpms increase...?
Header tick maybe?
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Old Oct 20, 2008 | 05:24 PM
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yeah its kinda like what u said..but only with foot on throttle..no ticking when no throttle. it never sounded like that before...so i find it kind of abnormal though..
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Old Oct 20, 2008 | 05:26 PM
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Originally Posted by hooleyboy
Header tick maybe?
+1....seen that before as well. Have someone in the car give it a little gas and with the hood open see if it is coming from one of the sides of the engine.
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Old Oct 20, 2008 | 06:53 PM
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it could be a possible exhaust leak or pinhole somewhere in the exhaust system (more than likely just a exhaust header gasket or flange gasket). unless your talking about the "wtf" noise which it sounds like it comes from somewhere in the tranny tunnel/ under the drivers seat. My roomate has a simmilar sound that only appears when its cold out. for the life of us neither of us can figure out where the hell it is coming from..... neither could the dealership.

its its a very very soft ticking noise it could just be your injectors. my roommate was freaking out about another ticking noise from his engine bay and after close inspection......ta da. the injectors click when they fire... what a coincidence lol. you would be hearing a soft ticking that would increase with rpms ( you would only be able to hear this under no load and low reving rpms as the ticking is fairly soft) and the most noticeable ticking would be if you put your head next to the driver side windshield wiper... its fairly audible there.

if none of these help you, pm me some more symptoms. it would really help the diagnosis
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Old Oct 20, 2008 | 10:41 PM
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well...i hear it when im driving, so this means i can hear the tick"softly" on the driver seat, also i can spot it even with some music, if i listen clearly, even my friends on the passenger side can hear it. i tried to listen for it when i put the car in neutral and rev it, but it doesnt seem to tick in "n" but im not 100% sure maybe it does. it only occurs when im driving and when i step on the throttle. no tick when just cruiseing to stop, or idleing.

anymore clues?

thanks!
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Old Oct 21, 2008 | 12:32 AM
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easy fix.....


turn the stereo up hahahahahah
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Old Oct 21, 2008 | 12:36 AM
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Probably something to do with the injectors, that is the only other source of ticking besides the lifters, but those would be most audible at idle.
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Old Oct 21, 2008 | 12:39 AM
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From: Tucson Az
1980 rx-7 with a 302
i have a good idea what your talking about (if im thinking about the correct thing)... but your chasing a ghost... my roomate says his c32 does it... ive hear it.... and appearently other c32s have heard it too... however no one ever figures out what it is... sorry to burst your bubble man.
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Old Oct 21, 2008 | 12:52 AM
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i think his noise is different. i think i figured out what MY ticking noise is....talked to the dealership and wrote it down on a piece of paper at home. will post when i get home from work in case this is the same noise.
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Old Oct 21, 2008 | 02:54 AM
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my service manager tells me that he thinks my ticking noise is coming from the "transmission tunnel where the transmission and driveshaft meet." he says that there is some insulation and heat shielding there that might be rubbing on something.
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Old Oct 21, 2008 | 02:57 AM
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Originally Posted by jturkel
my service manager tells me that he thinks my ticking noise is coming from the "transmission tunnel where the transmission and driveshaft meet." he says that there is some insulation and heat shielding there that might be rubbing on something.
well thats good news. I got the same problem some times my benz sounds like a 84 Caddy. as soon as i step on the gas that all changes
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Old Oct 21, 2008 | 03:00 AM
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sounds like a costly fix.....going to seek advice from my tech locally, also probably bring it in to the dealership..(dun wana go that route tooo much $$$$$).
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Old Oct 21, 2008 | 06:00 AM
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Originally Posted by jturkel
my service manager tells me that he thinks my ticking noise is coming from the "transmission tunnel where the transmission and driveshaft meet." he says that there is some insulation and heat shielding there that might be rubbing on something.

I had this exact problem last year

If it is this then you will only notice the ticking noise whilst on the move and it will increase and decrease in speed with the speed of the car and not engine speed/rpm,also in my case it only ever happened after the car had warmed up

when it happened to me I could hear the ticking better when I lifted the arm rest cover, which made me sure it was coming from the gearbox/driveshaft area ( on my first attempt at getting it fixed the dealer tried to tell me it was one of my stepper motors gone bad )

there are 2 things that can cause this.

Firstly if the heat shield is not positioned around the driveshaft correctly, then the exhaust heats up which will expand the heat shield and can cause it to rub on the driveshaft,
secondly there is some sound deadening material surrounding the gearbox which has some weights or something attached to it which can work loose and give the same result

I thought mine was related to the heat shield due to only happening when the car warmed up but it turned out to be the sound deadening thing

HTH

btw, this was very easy to fix once they found it and they didn't even charge me as I was having some other work carried out at the same time
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Old Oct 21, 2008 | 06:25 AM
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Originally Posted by timberman
I had this exact problem last year

If it is this then you will only notice the ticking noise whilst on the move and it will increase and decrease in speed with the speed of the car and not engine speed/rpm,also in my case it only ever happened after the car had warmed up

when it happened to me I could hear the ticking better when I lifted the arm rest cover, which made me sure it was coming from the gearbox/driveshaft area ( on my first attempt at getting it fixed the dealer tried to tell me it was one of my stepper motors gone bad )

there are 2 things that can cause this.

Firstly if the heat shield is not positioned around the driveshaft correctly, then the exhaust heats up which will expand the heat shield and can cause it to rub on the driveshaft,
secondly there is some sound deadening material surrounding the gearbox which has some weights or something attached to it which can work loose and give the same result

I thought mine was related to the heat shield due to only happening when the car warmed up but it turned out to be the sound deadening thing

HTH

btw, this was very easy to fix once they found it and they didn't even charge me as I was having some other work carried out at the same time
thanks! thats great info! is this a fairly easy DIY?
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Old Oct 21, 2008 | 07:33 AM
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I would say the hardest part would be gaining access

if you can get it up on a lift it should be fairly easy
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Old Oct 21, 2008 | 06:25 PM
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HAHAHAHAHAHHA...same thing here. still need to take it to VRP but just hasn't found the time.
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Old Oct 22, 2008 | 02:15 AM
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going to bring it in to the shop next week to check it out!
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