I need ideas guys and girls. I’ll put this as succinctly as I can.....
(2010 A3 2.0 tdi 170 CR 110k)
CAR HAS BEEN WELL MAINTAINED - FULLY DOCUMENTED FROM NEW.
- I have what is best described audibly as a ‘whistle/whine’
- started 2/3 weeks ago
- no slow build up that I noticed.
- One day it just started ‘whining’ - instant
- ‘whine’ is consistently older with increase and whiter with decrease in speed AND load.
- it could have been loose trim/mirrors etc. IT’S NOT
- Whine DISAPPEARS completely when clutch is FULLY engaged, Regardless of up or down shift or load.
- whine is present even when coasting (in gear)
- gear change and selection seem fine
- Driveability seems unaffected, (I think)
- Has it got worse/louder during these 2/3 weeks? ‘Maybe’ it has become more audible. If so, it’s minimally perceptible.
My IMMEDIATE reaction was it sounds like a boost / turbo issue (classic whistle/whine). HOWEVER, it’s dictated by clutch IN/OUT.
With NO mechanical input, my ideas so far :
- aero issues - NEGATIVE
- turbo (general) - Logically it’s a no
- boost sensor etc - logically it a no
- fuel / airflow /rads etc - logically its a no (as per boost)
- top/ bottom end - 99.9% negative
Rationale for above is that ‘Whine’ disappears upon full engagement of clutch. No overheating re lack of coolant/air or oil.
SO.....TRANSMISSION:
- thrust bearing - unlikely as only FULL clutch engagement Stops the whine
- dual mass - unsure??? Past experience (BMWs) dual mass is basically entire clutch with slippage symptoms etc ??
- full clutch - No slippage under load and engagement is smooth
- gearbox - tight with no change in selection
- synchro - no selection issues
I really need some help on this. I’m fairly handy but I have no workshop/lift/proper tools etc
More than happy to pay an indy for repair etc, but not hours of labour on diagnosis. I just can’t afford it.
any ideas on this common VAG CR engine are more than welcome. Even better would be Experience of what I’m describing.
Cheers guys and girls
(2010 A3 2.0 tdi 170 CR 110k)
CAR HAS BEEN WELL MAINTAINED - FULLY DOCUMENTED FROM NEW.
- I have what is best described audibly as a ‘whistle/whine’
- started 2/3 weeks ago
- no slow build up that I noticed.
- One day it just started ‘whining’ - instant
- ‘whine’ is consistently older with increase and whiter with decrease in speed AND load.
- it could have been loose trim/mirrors etc. IT’S NOT
- Whine DISAPPEARS completely when clutch is FULLY engaged, Regardless of up or down shift or load.
- whine is present even when coasting (in gear)
- gear change and selection seem fine
- Driveability seems unaffected, (I think)
- Has it got worse/louder during these 2/3 weeks? ‘Maybe’ it has become more audible. If so, it’s minimally perceptible.
My IMMEDIATE reaction was it sounds like a boost / turbo issue (classic whistle/whine). HOWEVER, it’s dictated by clutch IN/OUT.
With NO mechanical input, my ideas so far :
- aero issues - NEGATIVE
- turbo (general) - Logically it’s a no
- boost sensor etc - logically it a no
- fuel / airflow /rads etc - logically its a no (as per boost)
- top/ bottom end - 99.9% negative
Rationale for above is that ‘Whine’ disappears upon full engagement of clutch. No overheating re lack of coolant/air or oil.
SO.....TRANSMISSION:
- thrust bearing - unlikely as only FULL clutch engagement Stops the whine
- dual mass - unsure??? Past experience (BMWs) dual mass is basically entire clutch with slippage symptoms etc ??
- full clutch - No slippage under load and engagement is smooth
- gearbox - tight with no change in selection
- synchro - no selection issues
I really need some help on this. I’m fairly handy but I have no workshop/lift/proper tools etc
More than happy to pay an indy for repair etc, but not hours of labour on diagnosis. I just can’t afford it.
any ideas on this common VAG CR engine are more than welcome. Even better would be Experience of what I’m describing.
Cheers guys and girls
