Technical Bearing noise from crankshaft pulley? 😬

[zoltanpapp82]

Hello Fiat Owners,

recently I'm noticing a weird noise from my car, kind like a bearing/ rotating noise... The time has come to change the timing belt, tensioner and water pump, but the sound did not go away... I made a short video of it - accessory belt removed to close out that part. I know that resonator part of exhaust should be changed, but I think this sound is different. Could you give some feedback, what it could be, is it critical, or normal for a 17 years old car?

Thank you,
Zoltan

 

[bugsymike]

Hello Fiat Owners,

recently I'm noticing a weird noise from my car, kind like a bearing/ rotating noise... The time has come to change the timing belt, tensioner and water pump, but the sound did not go away... I made a short video of it - accessory belt removed to close out that part. I know that resonator part of exhaust should be changed, but I think this sound is different. Could you give some feedback, what it could be, is it critical, or normal for a 17 years old car?

Thank you,
Zoltan
View attachment 474737

To me it sound like a belt too tight around water pump or some other guide bearing.

 

[zoltanpapp82]

Hi,

so not the tension is high, but the belt is wide to the wheels?

 

[bugsymike]

Hi,

so not the tension is high, but the belt is wide to the wheels?

I would have said the tension was too tight, in my opinion.
If it was before belt changed I would have said waterpump bearings and possibly expecyted a sign of water leak from the hole below the waterpump casting as a clue.
Having jusy changed the timing belt all guide and tensioner bearings then assuming none faulty I would say timing belt tension too tight.
If you take the cover off and carefully use a long screwdriver as a stethoscope it should be possible to locate the noise, also on many modern tensioners they have guide arrows that have to line up which may show if belt is too tight.
If it was me I would check all that and then maybe try very slightly backing off the tensionioner and resecuring it, then check if noise changed.
Some people have mentioned certain makes of timing belt being noisy, but personally I would check what I have described.

 

[jackwhoo]

Possible crank pulley needs to be replaced? Though they usually knock when worn.

 

[zoltanpapp82]

Thank for both of your responses, and The Panda Nut for picking a side with bugsymike. I'll post update when I'm done with it.

 

[bugsymike]

Thank for both of your responses, and The Panda Nut for picking a side with bugsymike. I'll post update when I'm done with it.

No picking sides. More a case of "Great minds think alike or Fools seldom differ".