Thinking back to the old 748 / 916, the 748 was more likely to get you in trouble due to its thrashier, more frenetic nature!
Thanks mate, I do normally let it idle for a small period before shutting off, give the turbine time to slow down before cutting its oil supply, was just asking to see if modern cars had the pump idea etc so that the idle not needed ? Ringing VW today so may get a definitive answer ?
Cool, will be interesting to know for sure as there are so many turbo cars on the road now. If any 'special' techniques were required there would be cars left right and centre suffering turbo failures but that doesn't seem to be the case. Great choice of car BTW
Ok, just off phone from VW in Shirley, guy very helpful and took the time to explain many things. The long and the short of it is this..... Switch the car off when ever you like as the ECU's control coolant flow, oil flow and rad fans after the car is off. He did say it would not hurt to run "off boost" for the last mile of journey if the car has been "enthusiastically driven for a long period" but under normal driving, can just switch off. He was unsure if the car had an electric oil pump (which seemed odd that he didnt know) but did say they had ball bearing turbos and the speed of the turbine and its temperature were closely monitored, and that there have been no reported turbine failures on MK6 and MK7 cars due to ball bearing turbines. So, looks like I can just switch straight off, unless I've been ragging it to death, then would be prudent to ease off for the last mile or so. Sounds feasible
This is good interesting info. The GTI eliminates one common source of turbocharger problems by burning petrol - less soot to clog up the Variable Geometry mechanism. I guess it still has Exhaust Gas recirculation though which must create some risk of that problem.
How many times have you heard manufacturers and dealers saying that there have been "no reported failures" of some component, when this has turned out not to be the case?
I agree 100 per cent Burns petrol? You've lost me mate, a turbine spins off expelled exhaust gases on one side while the other rotating side pushes air into a plenum whereby it's condensed and pressurised causing boost. In an age of efficient and green engines, not sure a turbo that "burns petrol" is correct, I may be wrong but I thought all turbos worked essentially the same way. Turbine coking is caused by bearing lubrication oil, and as far as I'm aware they don't use petrol to lubricate turbine bearings? Hence, I'm confused?
The GTE I have is more of a worry.... the turbo petrol motor can come on or off in an instant without warming up or cooling down if the electric power cannot meet the demand of your right foot. Obviously some very clever people have figured all of this out, and if they have it sorted out in that scenario, your GTi's and R's are more than safe. Stop worrying
If you want to make the point that coking of the Variable Geometry mechanism is caused by oil exuding from the bearings rather than sooty exhaust gas then fine. But please don't insult me by implying that I said the turbocharger burns petrol or is lubricated by it when clearly I did not mean that.
i think he means the GTI is a petrol engine( with turbo) as opposed to diesel (with turbo). The latter which is implied, would create more soot potentially. if you both read it with that clarity in mind, i think you'll see where you maybe simply talking at slight cross purposes - been an informative thread thus far, don't let it go.
