Chirping Sound CLK350
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Newbie
Joined: Jul 2013
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CLK350
Chirping Sound CLK350
For the past 2 days in the morning when I turn on my car I hear a moderate sound of chirping coming from my engine. After I drive it for about 20 minutes it is gone.
What could it be?
What could it be?
MBworld Guru
Joined: Dec 2009
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Does it sound like it's coming from the dash, or the engine itself? On the very front of the engine is an air pump that runs right after start until it reaches a certain temperature. This electric motor can chirp when its bearing start to go bad. If it's coming more from the dash, it could be the ventilation fan. When its bearing go bad, it can also chirp.
Junior Member
Joined: Jun 2013
Posts: 66
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From: Houston
W222 s550 , BMW 535i 15’
I also have the same chirping sound accompanied by an electrical like ticking.
The chirping I believe is coming from a bad bearing as the fellas have stated, but it could also be the bearing on the coolant pump. Good luck!
The chirping I believe is coming from a bad bearing as the fellas have stated, but it could also be the bearing on the coolant pump. Good luck!
MBworld Guru
Joined: Dec 2009
Posts: 10,782
Likes: 1,011
NO LONGER ACTIVE
If you suspect it's a pulley bearing, and easy way to narrow it down is to (carefully!) spray some WD-40 onto the pulley bearing as it runs to see if it quiets down (try not to get it on the belt, though).
