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Discussion Starter #1
My TS Spider passed it's MOT this week with no advisories (y)
But.. It has also started making a whining/squealing noise on acceleration. This happens in any gear when the engine is under load and at or above 3K rpm.
The aux belt and tensioner have been changed and cambelt checked. The air intake pipe was also changed but none of these make a difference.
Attached is a link to a short video. Spider noise

Anyone have any suggestions?
Thanks Nigel
 

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I have heard of this happening when the rubber between the two concentric parts of the crank pulley that drives the auxiliary belt separate. If you use chalk/felt tip/liquid paper or alike to draw a line radially from the centre to the outside across the rubber layer to mark the two metal parts relative to one another. Drive the car, if the noise happens then look if the two layers have moved.
 

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Discussion Starter #3
Thanks for the reply, I will get it checked out. That pulley doesn't appear very accessible! N.
 

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Thanks for the reply, I will get it checked out. That pulley doesn't appear very accessible! N.
I have a V6 so not familiar with access to the crank pulley on TS I'm afraid. On the V6 you remove the wheel arch liner to access the pulley but that is a PITA. If you can jack the front of the car up and remove the wheel on that side and support it securely you might be able to get to it from underneath more easily.
 

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Discussion Starter #5
That's what I thought might be involved.
I meant to mention that the car was also run without the aux belt and still made the noise.
 

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That's what I thought might be involved.
I meant to mention that the car was also run without the aux belt and still made the noise.
Well it sounds unlikely to be down to my theory then. If it was revved hard at standstill without the aux belt it might conceivably happen as the revs rise quite quickly and the inertia of the outer part might cause it to rotate but not if it was being driven without the aux belt as the revs wouldn't rise quick enough. It would have to be very loose though. Does it have to be moving to make the noise or does it happen if the engine is revved when stationary too?
 

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Could it be caused by the variator? The TS is not my area of expertise but I understand they fail quite frequently.
 

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Discussion Starter #8
Don't know about the variator, I thought they just rattled. My local specialist has been looking at it but is stumped too!
Doesn't happen on revving the engine, only under load and over 3K rpm. Not gear or speed related.
 

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I can't offer any other explanation Nigel. it might be worth doing as I suggested just to rule it out but I would imagine it would be obvious visually if that was the cause. Hopefully someone else will have a solution.
 

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I know this probably is totally unrelated but one day out the blue, I started to get a squeal when approaching 3k rpm and above, usually when the variator would kick in, It turned out I had a split in my downpipe near the cats after it hit the ground at speed while driving, so the sound was traveling through and out the gap. Had it welded up and no longer hear the sound. Like I said probably different to your problem but I thought I'd share...
 

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May be something to do with the variable length intake coming in at those revs and a split or other form of gap causing the whistle.
 

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Discussion Starter #13
Thanks Zak and armoore, I will check those out. Where would I look on the intake side?
Nigel.
 

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Have a look at post #11 for a photo of the actuator and appropriate tubing (vacuum) for further investigation.

 
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