Noise on startup
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Joined: Feb 2005
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Noise on startup
I recently bought a 2002 C230k Coupe. I absolutely love this car, and can't believe there are not more on the road. I do have one question, when I start it up on a cold (less then 40 Deg F) in the morning it has a loud sound like an exhaust leak until about 3-4 mins after it has sat idling (I start the car and let it idle to warm up before I leave) then the sound goes away, in fact its funny I stayed out there in the morning with the car and the noise went from noticeable to quite just like someone closed a switch. What I was wondering, is this normal, is the noise an air pump for cold starts with reduced emissions or something.
Thanks
Charles
Thanks
Charles
MBWorld Fanatic!
Joined: May 2002
Posts: 2,916
Likes: 1
From: The blue white rock, third out.
2002 C230 Coupe(M111)
Originally Posted by TNStangman
I recently bought a 2002 C230k Coupe. I absolutely love this car, and can't believe there are not more on the road. I do have one question, when I start it up on a cold (less then 40 Deg F) in the morning it has a loud sound like an exhaust leak until about 3-4 mins after it has sat idling (I start the car and let it idle to warm up before I leave) then the sound goes away, in fact its funny I stayed out there in the morning with the car and the noise went from noticeable to quite just like someone closed a switch. What I was wondering, is this normal, is the noise an air pump for cold starts with reduced emissions or something.
Thanks
Charles
Thanks
Charles
Senior Member
Joined: Dec 2004
Posts: 465
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From: Bay.Area
'02 c230k coupe
welcome!
umm..if it sounds kinda rattling...in the engine, hmmm,.,. iono it happens to mine as well every morning. but i have no idea wut it is...or if it is also normal or not.... i dont have the answer (sorrie) .. i wanna know wut it is also.
umm..if it sounds kinda rattling...in the engine, hmmm,.,. iono it happens to mine as well every morning. but i have no idea wut it is...or if it is also normal or not.... i dont have the answer (sorrie) .. i wanna know wut it is also.
Senior Member
Joined: Jul 2004
Posts: 466
Likes: 2
From: Hawaii
2005 Volvo S40 T5 AWD, 2004.5 C230 Sport Sedan, 2005 E320 CDI, 2008 C300 4-Matic Luxury
Originally Posted by TNStangman
I recently bought a 2002 C230k Coupe. I absolutely love this car, and can't believe there are not more on the road. I do have one question, when I start it up on a cold (less then 40 Deg F) in the morning it has a loud sound like an exhaust leak until about 3-4 mins after it has sat idling (I start the car and let it idle to warm up before I leave) then the sound goes away, in fact its funny I stayed out there in the morning with the car and the noise went from noticeable to quite just like someone closed a switch. What I was wondering, is this normal, is the noise an air pump for cold starts with reduced emissions or something.
Thanks
Charles
Thanks
Charles
Member
Joined: Oct 2002
Posts: 164
Likes: 0
From: Bangkok
C200K
Originally Posted by PsssTkiD
welcome!
umm..if it sounds kinda rattling...in the engine, hmmm,.,. iono it happens to mine as well every morning. but i have no idea wut it is...or if it is also normal or not.... i dont have the answer (sorrie) .. i wanna know wut it is also.
umm..if it sounds kinda rattling...in the engine, hmmm,.,. iono it happens to mine as well every morning. but i have no idea wut it is...or if it is also normal or not.... i dont have the answer (sorrie) .. i wanna know wut it is also.
I know the bypass valve noise, but recently my car has developed a noise from the engine bay... a rattling that goes away after the engine has warmed up abit. A search on the Internet yielded a wealth of information regarding worn out belt tensioner pulley rubber shocks. I took my car into service and told the service guys to take a look and viola! my rubber mounts were half eaten away and cold tight belt would vibrate the tensioner and rattle it against the engine block.
All has been fixed under warranty.
Cheers,
3point
Senior Member
Joined: Dec 2004
Posts: 465
Likes: 0
From: Bay.Area
'02 c230k coupe
Originally Posted by 3pointedSTAR
I know the bypass valve noise, but recently my car has developed a noise from the engine bay... a rattling that goes away after the engine has warmed up abit. A search on the Internet yielded a wealth of information regarding worn out belt tensioner pulley rubber shocks. I took my car into service and told the service guys to take a look and viola! my rubber mounts were half eaten away and cold tight belt would vibrate the tensioner and rattle it against the engine block.
All has been fixed under warranty.
Cheers,
3point
All has been fixed under warranty.
Cheers,
3point
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MBWorld Fanatic!
Joined: Jun 2003
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From: Barcelona-Spain
Brabus K3
Originally Posted by 3pointedSTAR
I know the bypass valve noise, but recently my car has developed a noise from the engine bay... a rattling that goes away after the engine has warmed up abit. A search on the Internet yielded a wealth of information regarding worn out belt tensioner pulley rubber shocks. I took my car into service and told the service guys to take a look and viola! my rubber mounts were half eaten away and cold tight belt would vibrate the tensioner and rattle it against the engine block.
All has been fixed under warranty.
Cheers,
3point
All has been fixed under warranty.
Cheers,
3point
Thanks.
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MBWorld Fanatic!
Joined: May 2002
Posts: 2,916
Likes: 1
From: The blue white rock, third out.
2002 C230 Coupe(M111)
Originally Posted by 3pointedSTAR
I know the bypass valve noise, but recently my car has developed a noise from the engine bay... a rattling that goes away after the engine has warmed up abit. A search on the Internet yielded a wealth of information regarding worn out belt tensioner pulley rubber shocks. I took my car into service and told the service guys to take a look and viola! my rubber mounts were half eaten away and cold tight belt would vibrate the tensioner and rattle it against the engine block.
All has been fixed under warranty.
Cheers,
3point
All has been fixed under warranty.
Cheers,
3point
