Extra noise when cold
Thread Starter
Junior Member
Joined: Feb 2002
Posts: 42
Likes: 0
From: N. California
1994 C280, 2002 E320
Extra noise when cold
My '95 C280 just started making a lot more noise than usual first thing in the morning (cold). It sounds like the auxillary fans are on, but they aren't. After it warms up for 5 - 10 minutes, it goes away.
Someone mentioned it may be the air injector fan. What's that?
Anyone been thru this one before?
Someone mentioned it may be the air injector fan. What's that?
Anyone been thru this one before?
Thread Starter
Junior Member
Joined: Feb 2002
Posts: 42
Likes: 0
From: N. California
1994 C280, 2002 E320
I've had the car for about 5 years and the noise its making isn't normal. It always has been a little louder when cold, but this is loud.
Maybe this air injector fan is going bad, but I can't even find it. I hear the noise around the front of the engine. I've changed the water pump before so I know my way around the area. Is it electric?
Maybe this air injector fan is going bad, but I can't even find it. I hear the noise around the front of the engine. I've changed the water pump before so I know my way around the area. Is it electric?
Newbie
Joined: May 2003
Posts: 1
Likes: 0
From: Kuala Lumpur , Malaysia
C200 Dec'99
I have similar problem with my C200. My mechanic told me it is due to the hydraulic valve tappets. It is normal when the car is cold, especially after a few days not running. The other possibility is the auto belt tensioner inside the idler pulley. I have replaced mine twice 
. Hope it's helped. Bye
. Hope it's helped. Bye
