drive belt noise like bird chrips??

[fisherman54]

I have just replaced my drive belts on my hzj75 diesel 4.2 litre (HZ1) after fitting a new radiator and to my dismay I still have a chirping /whistling sound coming from under the hood that was present before radiator replacement.
I removed the A/C drive belt thinking this was the problem as I didn't need a new A/C belt and still the chirping sound.
After spraying the drive belts with CRC with the motor running the noise immediately disappears and the engine returns to normal quiet idle , only return at a later date.
I am at a total loss to understand this noise - if my water pump was on the way out the noise would still be apparent after spraying the belts ? likewise the alternator pully.
Could there be a problem with the fan clutch bearing although I believe this is a most rare occurance.
If anyone can offer a method of tracking down the cause of this noise without going and buying waterpumps,fan clutches and alternators please go ahead and offer your advise.
Regards

 

[Gun Runner 5]

Idler pulley bearings perhaps.

 

[Ratpuke]

Advice I used to receive was to quit worrying about it and drive it until forward momentum ceases. If this approach doesn't appeal to you check your bearings and belts. Does the chirping stop when clutch is engaged? Have you triple checked that your belts are tight?

 

[renago]

Idle pulls bearing .
Happened to me as well , after a change of drive belt .

Bye Renago

 

[HomerOz]

G'Day Fella's

Fisherman 54, if the squeaks disappear with a spray of CRC, it isn't a noisy bearing (it's the v-belts/fan belts)!

The traditional means of getting rid of these squeaks, is to use a stick of chalk (Blackboard chalk).
With the engine turned off, try to run the chalk down both sides of the all the v-belts, where you can get to them.
This won't stop the squeaks for ever but it will stop them for a while.

Hope that helps

D'oh!
Homer

 

[Nas90tdi]

Buy different brand belts. The bird chirp is often mistaken for idler bearing. If a shot of water(or CRC) on the belt will quieten it down for a few seconds, it's the belt. Not the bearing.

 

[fisherman54]

Advice I used to receive was to quit worrying about it and drive it until forward momentum ceases. If this approach doesn't appeal to you check your bearings and belts. Does the chirping stop when clutch is engaged? Have you triple checked that your belts are tight?

I need to keep 'worrying' about it due to the fact that I intend to drive across Australia pulling a trailer boat. The noise isn't the regular 'squeal' as one gets from loose belts as you put the accelerator down.
The noise was there previously to doing the new radiator and drive belts. I replaced the belts as they were very worn and cracked. Just as an aside the old and (new replacement) belts are coged - should I attempt to buy new belts without the cogs and could this be the cause?
I will try the tip of engaging/disengaging the clutch. The belts 'seem' correctly tight as I have no 'squeal'.
Thanks for your time and help in offering a tip. regards

 

[fisherman54]

G'Day Fella's

Fisherman 54, if the squeaks disappear with a spray of CRC, it isn't a noisy bearing (it's the v-belts/fan belts)!

The traditional means of getting rid of these squeaks, is to use a stick of chalk (Blackboard chalk).
With the engine turned off, try to run the chalk down both sides of the all the v-belts, where you can get to them.
This won't stop the squeaks for ever but it will stop them for a while.

Hope that helps

D'oh!
Homer

I will try this tip and hopefully then I can conclude that if the noise disappears for an extended period then I CANNOT possibly have a bearing etc problem - just belts . thx and regards

 

[fisherman54]

Buy different brand belts. The bird chirp is often mistaken for idler bearing. If a shot of water(or CRC) on the belt will quieten it down for a few seconds, it's the belt. Not the bearing.

Thanks for that, the thought of having a breakdown out on the Nullarbor Plain in summer is a nightmare.

 

[Nas90tdi]

300TDI engines in Defenders and Discoveries are notorious for this noise. Drives you nuts. It is exactly like a bird chirping to. You can throw idler pulleys at it all day trying to stop it. I found buying a slightly better belt clears it up usually.