Thread: Pulley bearing?

I'm not real sure but that doesn't sound like it a bearing problem

I'm can't tell from the video either but once you've got the fan and belt off it's not too hard to check all of the idler pulleys.
I've even prised the little plastic bits off each side of the bearings, washed them out, regreased them and refitted. Still going OK 45k kms later.
Probably worth doing just to eliminate one possibility.

Ok thanks, I might do that. The noise is definitely coming from some belt (or fan?) related component…

Years ago I had an intermittently binding CV joint that sounded very similar

Originally Posted by Samblers

Ok thanks, I might do that. The noise is definitely coming from some belt (or fan?) related component…

Years ago I had an intermittently binding CV joint that sounded very similar

Can't be of much help diagnosing but doesn't sound like a bearing - my tensioner pulley bearing disintegrated a couple of months ago and that sounds more akin to a burst intake hose (a whooshing sound almost). My belt had also moved across and was rubbing the block due to the broken bearing

You'd be hearing it more frequently than an odd knock given those bearings spin at such high RPMs

Can you see what the tensioners doing? Maybe pull the cowling off, the AC cover etc and run it. As above mentioned just detension the belt and have a spin of all the pulleys. Hold a long screwdriver to your ear and touch it on the different components (AC compressor, diff pulleys) carefully and might be able to zero in on the noise

Thanks, input appreciated. I'll have a go at that and report back.

Cheers, Sam

Originally Posted by Samblers

Thanks, input appreciated. I'll have a go at that and report back.

Cheers, Sam

Just had another listen... it almost sounds like something could be clipping the viscous fan under the cowling?... Like something flicking into it periodically as the wind picks it up although buckley's as to what that could be... Just an idea which will be quickly and easily identified by just undoing those six screw clips and pulling the cowling off if so

It’s not the silly turbo heat shield at all is it ?
Loose nut / broken mount allowing intermittent tapping against the mounts ?


I agree with above that it doesn’t sound like a pulley
But if your game the quickest way to check the pulleys is to slip the belt off on a cold engine and turn it over … won’t kill the engine with the water pump not turning for 10 seconds


Steve

Thanks both, great suggestions, I’ll get onto it this weekend

Cheers, Sam