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[MaxV6]

got back from north wales sunday night,   as we came in to the village, with window open, realised the mv6 was making a fair bit of noise…




if i had to make an educated guess, i'd say it sounded bearing related.., and i think it's on the left side (as viewed from the front)


so any bets as to what it is ?   it's loud, varies directly with engine speed,   irrespective of what the gearbox is doing….  (whether stationary in neutral, in reverse, or going forwards in drive)  almost sounds like a big turbo on it;s last legs (that whistley whining sound they make  )

[05omegav6]

Pop the aux belt off and run it without for no more than a minute at idle to see if it disappears...

If it does, try spinning the pulleys one by one... my money is on a dry/about to fail aux belt tensioner pulley

[Kevin Wood]

Air con compressor clutch, PAS pump or aux belt idler would be my best guesses, but, yes, try it with the aux. belt removed to eliminate, then see if the pullies on any of the above are rough or have play in them.

[MaxV6]

Aux belt tensioner was replaced about a year ago…..   (with a decent new one…..   one of the recommended kits)


i was thinking alternator (if it's where i think it is…..  lower left of engine as viewed from standing in front of the car…. )

[chrisgixer]

Aux belt tensioner was replaced about a year ago…..   (with a decent new one…..   one of the recommended kits)


i was thinking alternator (if it's where i think it is…..  lower left of engine as viewed from standing in front of the car…. )

As said, whip the belt off and spin the pulley, might be the alt bearings.

[Marks DTM Calib]

Yes, I would go with aux tensioner pulley, alternator or aircon pulley.

Easy to check as described above.