On the programme rip off Britain the owner of a car that had done 30k miles. The cars turbo charger failed on the motorway 3 months outside the cars warranty ( don't know the make of car ) was advised to contact the manufacture who told him it failed because he had not allowed the turbo to slow down after each journey before turning off the engine something I have never done even with my old Skoda diesel that had done 100k miles. Does anyone else do this on a regular basis Joe

Well technically speaking it's better to give it a chance to rest.

I got in to a habit of gathering my belongings after a journey before turning the engine.

Is it vital... unless its a performance Car I can't see it being a massive issue.

I've worked with commercial vehicles for years and no-one operating a truck or van considers that aspect when driving.....

Not on modern cars unless you happened to possibly be driving them flat out or maybe on the track.

@ UK NSL even on the motorway stopping at a Service Area does not require sitting letting the engine cool down.

There is built in protection anyway on these VW Group engines.

I'd imagine a lot of engines use a safeguard of some sort

If my wife has been driving it takes her that long to get parked straight the turbo has definitely stopped spinning

It's already been said but just to reiterate; on a modern turbo vehicle it is beneficial to allow the turbo to cool but not mandatory.

Most EU6 engines have an auxhilary cooling system that will allow for the gradual cooling of components such as the turbo anyway and whilst it's not circulating oil it still circulates coolant through it and prevents the likes of thermal shock.

Just use your brain and don't thrash your car and immediately turn it off. In most cases pulling into a car park, housing estate, motorway services is enough to let it cool down to an acceptable level.

 

Letting your car idle for a few minutes on the other hand is pointless and a waste of fuel IMO. The turbo and manifold is still going to be a few hundred degrees and couple the mass of a DPF filter on a TDI that is also going to be a few hundred degrees and its still going to be very very hot so you just have to trust the oil to do its job and not boil off.

 

Gone are the days when you would fit a turbo timer.

Edited 27 September, 20169 yr by SuperbTWM

Applies to petrol cars more than diesel really.

If I were the OP I would be saying to the manufacturer, prove it!

Ian.

What's the difference if you pull off the motorway to a junction and the stop/start cuts the engine? Where's the idle time?

What's the difference if you pull off the motorway to a junction and the stop/start cuts the engine? Where's the idle time?

That's were the auxiliary coolant pump kicks in to keep the engine at a constant temperature.

Ah, good to know

LC