noise after the engine is warm (15 min)

bezzat

Member
hi
i have problem with my car
after the engine is worm i Listen
Hears a jarring sound in the ear

I know it's hard to guess what it could be but still ..
All Pulley Replaced only left air conditioner compressor pulley, alternator and upper water pump (heating) not replaced

that I give a 1500 rpm accelerator and the noise increases

The vehicle did 300K km
There are ideas of which direction to go ?
TNK
 
Last edited:

Eric Experience

Well-known member
Bezzat,
To find out where the noise is coming from warm the engine then remove the fan belt and run it again. If the noise stops you know it is one of the pulleys. Eric
 

bezzat

Member
Bezzat,
To find out where the noise is coming from warm the engine then remove the fan belt and run it again. If the noise stops you know it is one of the pulleys. Eric
Great, I did not know it was possible to take off the belt, I will update
 

BrennWagon

He’s just this guy, you know?
Agreed, the sound is most likely coming from a bad bearing on one of your serpentine belt pullies. You may not be able to spin them a fast as the engine can, but you may feel some dragging or resistance even if you can’t reproduce the sound.
 

bezzat

Member
Agreed, the sound is most likely coming from a bad bearing on one of your serpentine belt pullies. You may not be able to spin them a fast as the engine can, but you may feel some dragging or resistance even if you can’t reproduce the sound.
I really hope it's from there - I wish, even though I have a doubt,
I'll get home ... the vehicle will heat up, turn off the engine and lower the belt and then I will hear
 

bezzat

Member
Thanks
I have a connection to OBD I can see the real condition of the whole vehicle
 

jrod5150

Active member
I had one recently with a noisy balancer. It’s posted on my IG valleyautosalesinc the balancer looked good but it was failing in a way that it had the drive belt running up against it. Shooting a little wd40 on to the edge would quiet it down for 30 seconds untill the wd dried out.
 

bezzat

Member
update...
i have still noise after i removing the belt
The question now is how to identify what the cause is?
 

BrennWagon

He’s just this guy, you know?
If the noise is still present with the serpentine belt removed, it’s probably your harmonic balancer
 

marklg

Well-known member
See the video here where I move it by hand with the engine off:


The sound is unique. Try moving it the same way with the engine off. It should not be loose.

Regards,

Mark
 

bezzat

Member
Sorry,
Mistake in POST my post 10
I have no noise after remove the belt...
The question now is how to identify what the cause is?
 

BrennWagon

He’s just this guy, you know?
If the noise is gone after removing the belt, then one of the driven accessories or idler pulleys is the source of the sound. With the engine warm and off, remove the serp belt and spin everything by hand. If you feel resistance in a pulley, the bearings are probably shot. The alternator should be able to spin relatively freely in one direction and not in the other direction. One thing you can try while warming up the engine is to engage and disengage the AC compressor to see if that’s having any effect on the noise
 

bezzat

Member
I had a noise like you describe. Take a hard look at the belt tension pulley.
Mine would howl and cry like baby shortly after start up as the engine warmed up.

bill in tomahawk
its replace two years ago ... but i have the old one
and I CHECK ALL PULLEY No one looked suspicious
 

Eric Experience

Well-known member
Bezzat,
Remove the pulleys one at a time and spin them in your hands, you must find it, with the ac unit move the pulley while pulling sideways to find any slop in the bearing. Eric.
 

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