Squeaky belt (I think)

TCubed · Mar 21, 2013

Hi chaps,

Got a squeak from the engine bay occasionally, sometimes on it's own, sometimes on rev increase. Disappears with a rev drop but probably needs sorting. Any suggestions as to where to start looking? I'm assuming it's a loose belt but are there other candidates?

Thanks!

Saint.V8 · Mar 21, 2013

Scared Mouse??

Possibly an Idler Pulley

wammers · Mar 21, 2013

Shiny accessory belt most likely.

TCubed · Mar 21, 2013

Lovely thanks

Will check RAVE and have a look at those
(I think I'll rule out the mouse though, the cats are in good shape after all..)

ovalandrover · Mar 22, 2013

air con compressor is another source

Datatek · Mar 22, 2013

Alternator bearings to add to the list.

TCubed · Mar 22, 2013

I don't think it's air con as it has happened when the outside temperature has been below 5°C when the pump shouldn't be running?

Thanks Data, will check those too

The sound is a MUCH less bad version of this if this provides any clues:
Top Gear Series 10 Episode 7 Part 1 - YouTube

TCubed · Mar 22, 2013

(5:00 in for anyone whose browser objects to the timestamp)

Datatek · Mar 22, 2013

TCubed said:
I don't think it's air con as it has happened when the outside temperature has been below 5°C when the pump shouldn't be running?

Thanks Data, will check those too

The sound is a MUCH less bad version of this if this provides any clues:
Top Gear Series 10 Episode 7 Part 1 - YouTube

The compressor input shaft still runs but the clutch is disengaged.

wammers · Mar 22, 2013

TCubed said:
I don't think it's air con as it has happened when the outside temperature has been below 5°C when the pump shouldn't be running?

Thanks Data, will check those too

The sound is a MUCH less bad version of this if this provides any clues:
Top Gear Series 10 Episode 7 Part 1 - YouTube

That was the belt slipping as the alternator loaded up. As i said earlier shiny accessory belt.

TCubed · Mar 22, 2013

Excellent, that should be enough to go on, thanks guys

TCubed · Apr 8, 2013

OK sit-rep:

Spent a while this morning burrowing around in the bay with RAVE, with the engine idling (squeak every minute or so), looking at the suspect components.
Unfortunately that is as far as I got, as whilst I looked at the compressor belt, alternator, and (fan?) belts, all seemed to be spinning fast with no slippage - too fast to see anyway.
Sooooo.... short of replacing all of it... does anyone have any diagnostic tips (I'm assuming this doesn't show on any computer diagnostics?).
The (painfully) loud squeak seems to come from all the belting around the fan, although this could be placebo on my part since I see many belts in that region)

The fans in front of the radiator weren't spinning, if that helps at all..

Thanks!

fanatic · Apr 8, 2013

Take belt off and spin each pulley

TCubed · Apr 8, 2013

fanatic said:
Take belt off and spin each pulley

To identify whether it's a slipping belt or loose pulley?

TCubed · Apr 8, 2013

Additional info:

Just realised that this started just after I changed the radiator... could I have insufficiently tightened the fan back on or something..?

Datatek · Apr 8, 2013

TCubed said:
Additional info:

Just realised that this started just after I changed the radiator... could I have insufficiently tightened the fan back on or something..?

If the fan was loose you would know it. The belt is tensioned by a spring arm so should be correct. Most often it's a bearing going in an idler pulley.

Squeaky belt (I think)

TCubed

Active Member

Saint.V8

Dyed-in-the-wool 100% RR Junkie

wammers

No longer with us, RIP

TCubed

Active Member

ovalandrover

Well-Known Member

Datatek

Well-Known Member

TCubed

Active Member

TCubed

Active Member

Datatek

Well-Known Member

wammers

No longer with us, RIP

TCubed

Active Member

TCubed

Active Member

fanatic

RESPECT IS EARNED, BEATINGS ARE FREE ;-)

TCubed

Active Member

TCubed

Active Member

Datatek

Well-Known Member

Similar threads