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Large MPVs -- Ford Galaxy / VW Sharan / SEAT Alhambra: => Ford Galaxy / VW Sharan / SEAT Alhambra => Topic started by: samdooley on January 08, 2018, 07:54:08 PM

Title: Power steering / Aux belt Tensioner/ alternator pulley / ac clutch plate
Post by: samdooley on January 08, 2018, 07:54:08 PM
Hello, my first post, what a great wealth of information here!

 recently there was a screeching noise and then a thud from my 02 alhambra 1.9 which turned out to be the aux belt coming off. the power steering went whilst driving. When i took the engine tray off the bottom i found the clutch plate fro the A/c compressor in it!

i have read a lot of threads here and elsewhere.  I have put the aircon on Econ mode so the a\c compressor is inactive and put a new belt on so that i can drive the car.  it works well enough apart from a slight judder in the steering when i turn the wheel at very low revs (which was not there before).

I checked the tensioner which looks quite new (i have recently bought the car second hand) and have also inspected the alternator pulley (put small screwdriver into alternator and pulley turns one way freely but not the other) and feel that they are not broken....? there is no obvious 'bounce or wobble in the belt when someone else turns the steering wheel.

I intend to replace the a/c compressor clutch plate with a spare part (looks like i can do it in situ).

how do I get rid of the steering judder?  do I change tensioner and alternator pull to be sure they are good, then replace a/c compressor clutch plate....then if its still there i could replace power steering pump (i did check power steering fluid)?


Thank you,
Sam


Title: Re: Power steering / Aux belt Tensioner/ alternator pulley / ac clutch plate
Post by: johnnyroper on January 08, 2018, 11:33:26 PM
Did the air con compressor rotate freely by hand despite the clutch being knackered?


I have had similar issues to you with steering vibration 1st time was alternator pulley 2nd time the tensioner was knackered and bouncing around.

Does your vibration gonif you raise engine rpm slightly?
Title: Re: Power steering / Aux belt Tensioner/ alternator pulley / ac clutch plate
Post by: Chrispb on January 08, 2018, 11:39:42 PM
How has the clutch fell off? is the centre bolt missing or sheared off,are you sure the pump hasn't seized, is there any play/looseness in the pulley
Title: Re: Power steering / Aux belt Tensioner/ alternator pulley / ac clutch plate
Post by: samdooley on January 09, 2018, 07:40:54 PM
Hi, thank you for your replies.

johnnyroper- The a/c compressor pull rotates freely by hand and does not seem to be doing anything unusual when being rotated by the belt.   

The vibration does go away if the revs are increased slightly, so when driving the vibration is not there, just when stationary or at low revs...is this because more power is being put into the battery?

Chrispb-
The centre bolt is still in place on the compressor, the thread on it is in tact and the splines that engage the clutch plate are ok.  the nut that holds the plate on is missing. ( the centre bolt is attached to the compressor and not the clutch plate, is this the same with all models?) the clutch plate its self is in tact apart from the splines that would have engaged with those around the central bolt on the compressor are worn away.  I feel that the clutch plate had come loose and was chattering about for some time before the nut eventually came of.
the pully seems ok but i will check again for loosness.

i think i will replace the alternator pully, tensioner and clutch plate for good measure and see how we go!

thanks
again,
Sam

Title: Re: Power steering / Aux belt Tensioner/ alternator pulley / ac clutch plate
Post by: gregers on January 09, 2018, 08:36:26 PM
you may find the nut sitting in your under tray,as the nut has come off you may well find that the clutch plate has been osillating on the spline,when mine failed it made a horrendous noise before totally falling aprt,we found everything sitting on the tray,i bought another pump and used the plate and replaced insitu without taking the compressor off.
Title: Re: Power steering / Aux belt Tensioner/ alternator pulley / ac clutch plate
Post by: elikoy77 on January 09, 2018, 08:38:33 PM
hi, check to make sure that your alternator belt is not oversize or slack. I once have the same experience and turnout to be oversize alternator/engine belt. look for the recommended belt for your engine. Oversize belt will make your engine to vibrate via your belt tensioner in low rpm 
Title: Re: Power steering / Aux belt Tensioner/ alternator pulley / ac clutch plate
Post by: KingyMAK on January 09, 2018, 08:59:17 PM
Did the air con compressor rotate freely by hand despite the clutch being knackered?


I have had similar issues to you with steering vibration 1st time was alternator pulley 2nd time the tensioner was knackered and bouncing around.

Does your vibration gonif you raise engine rpm slightly?

Iím doing this job on Saturday...  :-X