Chirping sound
Thread Starter
Super Member
Joined: Oct 2007
Posts: 642
Likes: 1
From: Natick, MA
2010 C350 Sport
Chirping sound
Hey guys,
My 2008 C300 sat for a couple weeks while I was on vacation and now it is making a strange sound that is coming from the motor. It kind of sounds like a chirp, it happens when I am driving and while it is idling.
Here is the weird part though, it only does it after about 5 minutes of running and it will go away after 10 minutes or so.
It is driving me nuts and I need to figure out what is doing it.
Any ideas?
Thanks
My 2008 C300 sat for a couple weeks while I was on vacation and now it is making a strange sound that is coming from the motor. It kind of sounds like a chirp, it happens when I am driving and while it is idling.
Here is the weird part though, it only does it after about 5 minutes of running and it will go away after 10 minutes or so.
It is driving me nuts and I need to figure out what is doing it.
Any ideas?
Thanks
Member
Joined: Sep 2010
Posts: 146
Likes: 1
From: IL
07 E63, 04 discovery
the belt is common for this type of noise after sitting for a while. i have corrected it many times by using some needle nose pliers and very lightly touching some sand paper to the belt while its running. ( Be careful, dont need to go overboard just gently against the belt for 2-3 seconds should do it, if thats what your problem is. Otherwise it could be the idler pulley next to the water pump.
Thread Starter
Super Member
Joined: Oct 2007
Posts: 642
Likes: 1
From: Natick, MA
2010 C350 Sport
the belt is common for this type of noise after sitting for a while. i have corrected it many times by using some needle nose pliers and very lightly touching some sand paper to the belt while its running. ( Be careful, dont need to go overboard just gently against the belt for 2-3 seconds should do it, if thats what your problem is. Otherwise it could be the idler pulley next to the water pump.
I will give it a try tonight.
Thanks
Senior Member
Joined: Oct 2011
Posts: 360
Likes: 3
From: Pittsburgh, PA
2020 C363 S / 2007 SLK55 / 2016 F150 4x4 / 1998 Cobra Convertible
As was mentioned, it definitely sounds like a belt/pulley issue. But before I'd apply any lubricant or 'sand' a belt, I'd just let it go for a few hundred miles and see if it goes away naturally...I'm thinking it most likely will.
