Screech/wine

[Retiredroamer]

Hello
2018 Cali 150 DSG 29000 miles, not used everyday, not daily runner, last used Boxing Day 2025 and now this week just taken out for run down south coast.

When started I heard a screech/wine coming from engine area similar to the sound of a car starting with dodgy fan belt but my sound/screetch/wine is continuous.
It’s not that loud, I can hear it driving, hear it on acceleration but goes when I take foot off accelerated but when I brake the wine/screetch returns.

Vehicle has full service history, has had DSG oil changed, has had cam belt water pump changed 18 months ago. Before I take it to VW for diagnosis at a cost, any ideas ?

Thanks

 

[Perfectos]

My guess would be serpentine belt tensioner.

 

[Retiredroamer]

My guess would be serpentine belt tensioner.

That’s something I have to research. Squirt with WD40?

 

[Retiredroamer]

That’s something I have to research. Squirt with WD40?

Research indicates a match. Thank you, will book into my local garage.

 

[Perfectos]

Report back to help others pls

 

[sidepod]

At the risk of asking a stupid question, did you lift the bonnet and establish at least what part of the engine is making the noise?

 

[Retiredroamer]

Report back to help others pls

I will do, just driven from coast back home. Noise was consistent but all was well with engine/power/performance

 

[Retiredroamer]

At the risk of asking a stupid question, did you lift the bonnet and establish at least what part of the engine is making the noise?

Stupid question accepted, I did look under bonnet, looking from this position the noise is coming from the area of the offside of the vehicle engine bay and I think where the belts are under a cover on the side of the engine. Beyond my capabilities to even look under the cover so the cali will have to go in.

 

[Perfectos]

offside of the vehicle engine bay and I think where the belts are under a cover on the side of the engine.

You are correct that's where the auxiliary (serpentine) belt is located , belt tensioner and timing belt. Reside in the same area.

IMO: no question is a stupid question if you don't know the answer

Edit the early T6 had a workshop action to replace the timing belt cover with a different design to prevent the Auxiliary belt from destroying the timing belt under failure conditions.(I.e. a failed aux belt could destroy an engine in one go if the revised cover is not fitted).

The T6 aux belt tensioner is a known issue (T5 &T6 ) and again a workshop action. VW should not charge you for the Revised cover and belt tensioner if you have warranty, if no warranty expect either "good will" or a bill for parts and Labour -

Note: you could argue that if your vehicle has full VW history during its first three years the workshop actions should have been completed within that time under warranty! As was expected by VW of dealer during VW service regime

 

[Retiredroamer]

You are correct that's where the auxiliary (serpentine) belt is located , belt tensioner and timing belt. Reside in the same area.

IMO: no question is a stupid question if you don't know the answer

Edit the early T6 had a workshop action to replace the timing belt cover with a different design to prevent the Auxiliary belt from destroying the timing belt under failure conditions.(I.e. a failed aux belt could destroy an engine in one go if the revised cover is not fitted).

The T6 aux belt tensioner is a known issue (T5 &T6 ) and again a workshop action. VW should not charge you for the Revised cover and belt tensioner if you have warranty, if no warranty expect either "good will" or a bill for parts and Labour -

Note: you could argue that if your vehicle has full VW history during its first three years the workshop actions should have been completed within that time under warranty! As was expected by VW of dealer during VW service regime

Interesting, thank you. To my knowledge non of this work was done when I had the cambelt changed. I will have a chat with them