Squealing fanbelt - 300TDi 110 Def

[Didge]

Hi all, I can't seem to stop any fanbelt I install from squealing - my mechanic reckons it could be dust and dirt but I reckon I've pretty well cleaned it with silicon spray to eliminate that source. I've tried the shiny and matt finish fan belts as suggested by more knowledgeable people but am lost as to how to stop it. Any suggestions would be gratefully appreciated.
cheers gerald

[wrinklearthur]

Hi Gerald

Drives me nuts when that canary sings.

My latest thoughts are that the pulleys are a minuscule out of alignment.
Holding a long steel ruler as a straight edge against the harmonic balancer, using a verier caliper measure from the edge of the straight edge to the first ridge of where the multivee belt run then go around each of the other pulleys in turn and repeat the measurement.
You may find that one of the pulley's needs a shim making, to get the pulleys mutlivee ridge's back in line.

Carefully clean out the gulley's of the multivee's with a thorough action, that will stop the belt climbing to one side as well.

The axis of the shaft for the alternator may not be parallel to the crankshaft axis, a bit of fiddling is needed to fix that error!
.

[Grappler]

Try putting a a small washer or 5 cent piece behind the belt tensioner

just back off the nut in the center and slip the washer in at the 9 oclock position (veiwed from the front) and clamp it up. Worked for me.

[rangieman]

Try putting a a small washer or 5 cent piece behind the belt tensioner

just back off the nut in the center and slip the washer in at the 9 oclock position (veiwed from the front) and clamp it up. Worked for me.
x2 ;)

[Jojo]

My latest thoughts are that the pulleys are a minuscule out of alignment.

.

I think you are on the right track. Or the water pump may be on its way out.
Cheers

[Bushie]

Tried all sorts of things to stop mine, spray with water would stop it for a while. Eventually replaced the tensioner - I'd forgotten how quiet it should be :D
The bush/plastic ? in the tensioner had a crack through it.

Martyn

[wrinklearthur]

Try putting a a small washer or 5 cent piece behind the belt tensioner

just back off the nut in the center and slip the washer in at the 9 oclock position (veiwed from the front) and clamp it up. Worked for me.

The belt tensioner can wear to the point that it is running the belt out of phase, off to one side and whilst the bearing can be replaced cheaply, the soft bushing in the pivot wears thin on one side, this is when you can do a temporary fix with a coin.
I replaced belt tensioner with new, in both of our on road vehicles and the canary came back! :mad:
.

[wrinklearthur]

I think you are on the right track. Or the water pump may be on its way out.

Replaced on both vehicles, the belt and the water pump !!! and the canary came back. :rocket:

Can you imagine two Land Rovers idling side by side with their canary's singing a duet?
Maybe the canary's could be trained to whistle something like, look on the bright side of life?

Always Look On The Bright Side of Life - YouTube

How I wish I could train those canary's to play dead!

http://api.ning.com/files/paFGdtjFyaQpuxTicROeRM2AhPoPNQuI60YH9NtATVdhAK0zct gDhHVVTgG9lTQ6yGRO3SRkmbBEr88BodEwdmZqIRy1h332/DeadCanary.jpg

.

[Loubrey]

Allmakes 4x4 does an aftermarket replacement tensioner with a sealed bearing that will outlast the original by many years...

[harro]

Didge,
be careful when you do it (for obvious reasons).
Lube the inside of the belt with a bar of soap while the engine is idling.
Dry lube stick would be better but a bar of soap will do.
Works for me every time.;)

Cheers,
paul.

[landiematt]

Sometimes if the pulley is worn out the belt will bottom out in the pulley causing the anoying noise. The only fix was to replace the pulley at fault.

[Blknight.aus]

also try this quick check..

turn the steering, if the noise goes away or lessens while you are turning the wheel (it works better if you jack the front axle) then you need to check the float on the powersteering pump.

[wrinklearthur]

also try this quick check..turn the steering, if the noise goes away or lessens while you are turning the wheel (it works better if you jack the front axle) then you need to check the float on the powersteering pump.

Hi Dave

Thanks for that pointer.

Also could the load on the belt from the power steering pump increase as the pump wears ?
.

[PAT303]

My moneys on the dust cover rubbing on the idler,have you ever replaced the bearing?,if you put the dust cover on back to front it will squeal it's head off.Start the engine and give the cover a squirt of WD and see if it stops. Pat

[wrinklearthur]

I always place the belt so I can read the lettering when I stand at the front of the vehicle, what do you think, is the belt rotating in the correct direction?
.

[Didge]

Wow, what a response. Thanks guys, I had no idea there were so many possible causes and that it was such a widespread issue. I've tried WD40 and silicone spray numerous times and they only last for a while. I've replaced the idler bearing about 15000km ago and one of the other ones. I'll try all your suggestions and if I'm successful in killing off the canaries, I'll let you know which method worked.
Many, many thanks again.
cheers gerald