screeching belt

[hilex08]

Help....

The old LS 400 beats me.......

why does my fan belt screech when i start? It dies after a little revving and keeps quiet until i re-start again

the belt is tensioned to what I think it should be, and i sprayed a little bit of "combat"on the belt while it idles, but to no avail


any ideas/recommendation out there?

[ThysdJ]

I have the same problem with my Kaspaas.

[CasKru]

How old is the belt and how sure are you that the tension is correct (factory spec)?

[Scooter]

Could be the type (make) of belt you are using.
I would change the belt and makes sure all the pulleys are running straight. :|

[Scorpion]

"Stop dicing in the early mornings! The car needs to warm up properly first, otherwise the belt will stretch..."

That was my Grandfathers advice when I had the same problem with my first Golf!

[ThysdJ]

How old is the belt and how sure are you that the tension is correct (factory spec)?

Belt is brand new... and set to spec...

[CasKru]

Which belt is making the noise? (22r has three)

[ThysdJ]

My 22R does not have 3 belts.... oh wait, I don't have a 22R...

[CasKru]

My 22R does not have 3 belts.... oh wait, I don't have a 22R...

Mine has a black belt!

[hilex08]

uh uh....the problem started when the fuses kept popping, the fuses and wires are now safely tucked away and fixed, but the belt still goes..........SCREEEEEEEEEEEEEECH..........

[BenHur]

Treat your van's belts with some good quality Silicon spray. Professor Dadz Toy can give you the run down on what to buy, I normaly just stop of at a friend who has a workshop and aske him to spray my belts.

[hilex08]

silicon spray?, never thought of that !!!

thanks Bennie !

[Birdingou]

Help ! What would the facoty settings be for 2002 KZ fan and other engin belts

[Mud Dog]

I've always set belt tensions by feel . Too tight and you will run bearings on the Alt / water pump / steering pump / compressor etc. Too loose and te belt will screech. As a guide line, tension to the point that you still have 5mm 'give' across the longest open section of the belt if held between forefinger and thumb (not with brute force). Never had a problem in over 35yrs doing it that way.

[hilex08]

I eventually changed the belt for a new one.

Problem was, that my lexus has no power steering nor aircon, so the belt is a "measured to fit belt", and only runs thru/over the crank, tensioner, waterpump, and alternator.

Was a real mission to fit the new belt, and problem solved.

Tried silicon spray, belt dressing, sunlight soap, but nothing helped. The belt simply stretched so far that the tensioner was on the max.

[Mud Dog]

Glad you came right! Just as a matter of interest .... I've tried various products over the years, and of the aerosol spray types found Spanjaard Belt Dressing to be one of the better ones, but it doesn't beat good old beeswax if you can get it .... that belt runs so quiet you can hardly hear it! Generally a non petroleum based wax would be a better option than the aerosols IMO.

[MaPaZa]

Ek het baie jare terug die boereraat gekry om die belt met water skoon te spuit, te laat droog word en dan met remvloeistof te vryf - neem 'n bondeltjie toiletpaier, doop dit vinnig in die remvloeistofhouertjie en vee die belt daarmee. Dit werk, en kon nog nooit sien dat dit skade doen nie. Al die ander goete sal ook seker werk, maar 'n mens het nie noodwendig by jou as die geskrou begin nie. Remvloeistof is altyd met jou.

[Traveler]

Do not use silicon spray on belts. You are reducing its lifespan.

Use a good belt dressing spray, like Wurth or Spanjaard. I use Wurth.

If it stretches so soon you might be running to high tension. Have you tried a ribbed belt like the Goodyear Gator?

[Polarbear2008]

AFAIK regarding belt tension - when it is set correctly, you should be able to grab hold of the belt and give it a quarter turn only, then it is set correctly. If you can't turn in a quarter of the way, it is too tight! As easy as that.