Weird Knocking noise from back of engine
Thread Starter
Joined: Aug 2008
Posts: 239
Likes: 7
15 GLA 45, 09 C63, 06 WRX STi
Weird Knocking noise from back of engine
Just past 3500 miles and car is running perfect, but lately a weird knocking noise as cropped up.
The noise only occurs at low RPMs (< 2000rpm) and is very audible inside the cabin. At first I thought it was the transmission, since the noise seemed to come from underneath the center console area. Changing to reverse, neutral etc though does nothing to eliminate/change the sound so transmission can pretty much be ruled out.
Im also pretty sure its not lifter/camshaft noise, as you cant hear the noise inside the engine bay (its weird though cause you can "feel" the knocking if you touch the engine bay frame).
The only thing I can think of is something inside the torque converter is not right causing some sort of knocking engine side.
Other than the noise the car is running fine, havent noticed any side effects since the noise started.
I took a recording of the noise inside the cabin, you can download the audio file below...have to turn the volume up pretty high to hear it though.
http://www.zshare.net/download/69101470d4be16f4/
Anyone have anything similar or any ideas?
The noise only occurs at low RPMs (< 2000rpm) and is very audible inside the cabin. At first I thought it was the transmission, since the noise seemed to come from underneath the center console area. Changing to reverse, neutral etc though does nothing to eliminate/change the sound so transmission can pretty much be ruled out.
Im also pretty sure its not lifter/camshaft noise, as you cant hear the noise inside the engine bay (its weird though cause you can "feel" the knocking if you touch the engine bay frame).
The only thing I can think of is something inside the torque converter is not right causing some sort of knocking engine side.
Other than the noise the car is running fine, havent noticed any side effects since the noise started.
I took a recording of the noise inside the cabin, you can download the audio file below...have to turn the volume up pretty high to hear it though.
http://www.zshare.net/download/69101470d4be16f4/
Anyone have anything similar or any ideas?
Thread Starter
Joined: Aug 2008
Posts: 239
Likes: 7
15 GLA 45, 09 C63, 06 WRX STi
yes actually...this car is a good day only car so it goes a few days to a week at a time in between drives...
why what does that mean?
also, forgot to add in original post that that the noise does not start until the car warms up (2-5 min)
why what does that mean?
also, forgot to add in original post that that the noise does not start until the car warms up (2-5 min)
Last edited by jstefanop; Nov 28, 2009 at 02:39 AM.
Thread Starter
Joined: Aug 2008
Posts: 239
Likes: 7
15 GLA 45, 09 C63, 06 WRX STi
yea problem is I dont trust my dealer with changing the oil, let alone fixing an engine problem...Id like to narrow down what it is before I go in there.
mthis why did you ask that question? Any insight?
mthis why did you ask that question? Any insight?
