Squeaking noise coming from the engine
Thread Starter
Junior Member
Joined: Jul 2007
Posts: 47
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From: Indonesia
German karts
Squeaking noise coming from the engine
Guys, recently i noticed there is a squeaking noise coming from the engine when it started cold (first start of the day, regardless the ambient temperature ie. cold morning, warmer noon) I couldn't figure out where is it coming from 
The noise is very noticeable from the outside but not heard from the inside with all doors and windows closed.
When the engine gets warmer, the noise dissapears. If the car has been sitting for a while letting the engine completely cold (4-5 hrs - approx 20 deg celcius ambient temperature), the noise will reappears when its started. If the engine started in warm condition, no noise generated.
This used to be intermitten problem, sometimes when started cold, no noise generated at all, but now it's always squeaking whenever the engine started cold.
Should I be worried? I haven't bring it in yet. Thanks in advance guys!
oh yeah, the car is 2001 ML320 with about 47k km on the odo
The noise is very noticeable from the outside but not heard from the inside with all doors and windows closed.When the engine gets warmer, the noise dissapears. If the car has been sitting for a while letting the engine completely cold (4-5 hrs - approx 20 deg celcius ambient temperature), the noise will reappears when its started. If the engine started in warm condition, no noise generated.
This used to be intermitten problem, sometimes when started cold, no noise generated at all, but now it's always squeaking whenever the engine started cold.
Should I be worried? I haven't bring it in yet. Thanks in advance guys!
oh yeah, the car is 2001 ML320 with about 47k km on the odo
MBWorld Fanatic!
Joined: Nov 2001
Posts: 4,260
Likes: 6
From: Philadelphia area
2010 ML550, 2010 E350 4M, 1966 Corvette Convt C2
Could be anyting that is driven by the serp belt or the belt tensioer. Items driven include the alternator, water pump and power steering unit. I would look first at the belt tensioner and after that perhaps an alternater bearing.
