k series cam belt noise

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Julian H
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k series cam belt noise

Hi

I am getting increasingly concerned, and deafened by a whirring / rubbing noise from my cambelt area. It is quiet for the first few minutes but slowly gets louder as the engine warms up. 

It is not really a whirring or rubbing noise, its sort of a belt noise. I wonder, is this a common / known problem, what is the most likely source. Could it be the tensioner bearings? The belt itself? 

The tension is correct, the belt appears in perfect condition, does not appear to be fouling anything and was only replaced last year [less than 1000miles ago :-o]

Appreciate some wisdom please.

Thanks,

Julian

garybee
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Have you tried running without the alternator drive belt to rule out it/the alternator?

SM25T
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Try putting a screwdriver on the engine in various places and cup your hand on the handle end to listen to specific places.
Julian H
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I will try both suggestions thanks. Anymore?

Melody's weight loss councillor Wink

ECR
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Water pump?

revilla
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Tensioner?

SV VVC 170 - 170.4 bhp @ 7100 rpm - 142.4 ft.lb. @ 4900 rpm

TomB
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To be honest, there's not much in the area of the timing belt to make noise - as above, tensioner bearing, grumbling water pump, belt rubbing.  Alternator belt could be rubbing on the cover.  Your best to run without with the cover and investigate with a long screwdriver for noises, taking care not to drop it of course!   

 

Wrightpayne
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I wouldn't rule out belt overtightening. If manual tensioner - was the spring used?

grumpy the 7th
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Try pushing the top of the plastic cam cover casing back towards the engine block. Many years ago my cover slightly eased away from the block causing the inside back to gently rub on the pulley giving a slapping sound.

I tried flexing the cover back but once warm/hot it would flex away from the block again.

I've simply attached a bungie cord to the cover top bolt hole and pulled it around the breather pipe. No one has ever mentioned it (or not noticed) but it's been like this now for 10+ years. cheap fix Whistle

Bakewell, I prefer a tart

Wrightpayne
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You sure there isnt a bolt missing or worse still loose and about to drop out!?

Goes for the OP too!!

Julian H
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Hi

Thanks for the suggestions, when i have had a chance to investigate, i will let you know.

Cheers

Julian

Melody's weight loss councillor Wink