Hello everyone. Just wondered how long it takes everyone's VRS to cool down after using it?

Bizarre question i know, but i've noticed that mine always feels coolish after a run, but if i come back to it after an hour or so and put my hand on the Grille it's often red hot!

Are your VRS's the same?

It depends a bit - if you've been on a spirited drive let it idle for a little while, say a minute, to allow the turbo to cool a little.

Beyond that it can take a few hours to cool down

All turbo cars should be let idle a bit if they have been under heavy stress recently for example if you drive hard just before parking the car.. I usually give it at least 1-2mins depending how hard I drove.. another way is to drive easy the last couple of km before parking the car.

I would have said there is no sure answer mate. How hard you have been driving and the outside temp will be factors to consider, but a few hours would probably be normal after a long/hard drive. Theres alot of stuff under that bonnet, made of metal mainly, (i realise you know that already:) ) that retains heat for a long time.

@ww vrs, i thought you let the car idle after a run to help your turbo's life, cos if you turn the engine off as soon as you stop, the turbo carries on spinning after the oil has stopped being pumped round, thus eventually knackering the turbo's bearings. I don't think it will cool from white hot in a minute or so.

(sounds a bit cocky when i read that back to myself, but wasn't meant that way)

Just wondered if anybody knows why it gets hotter after the engines been turned off for a while. It's fairly cool after a run but it seems to really heat up about an hour after i've used it?

Just wondered if anybody knows why it gets hotter after the engines been turned off for a while. It's fairly cool after a run but it seems to really heat up about an hour after i've used it?

Maybe because when you're on the move the engine is getting a constant flow of air cooling the engine - when you're at a standstill you're not. Turbo's run very hot and will take a while to cool down

Chris

Also, once the engine is off no coolant is circulating.

@ww vrs, i thought you let the car idle after a run to help your turbo's life, cos if you turn the engine off as soon as you stop, the turbo carries on spinning after the oil has stopped being pumped round, thus eventually knackering the turbo's bearings. I don't think it will cool from white hot in a minute or so.

Thought that's what I said ? Idling it for a minute will help quite a bit, it will knock a few hundred degrees off. Admittedly it's still gonna be scorching ya

(ps didnt think that was cocky )

The engine will heat up as the residual heat does not get expelled via the cooling system. Temperatures will jump a bit when that happens.

You can tell when you turn the engine back on, the temperature gauge will drop back down a little usually.

On my Pug 205 it used to cause some fun with the carb overheating, so if you stalled it you had to let it cool down (that carb was shot though )

Thought that's what I said ? Idling it for a minute will help quite a bit' date=' it will knock a few hundred degrees off. Admittedly it's still gonna be scorching ya

(ps didnt think that was cocky )

The engine will heat up as the residual heat does not get expelled via the cooling system. Temperatures will jump a bit when that happens.

You can tell when you turn the engine back on, the temperature gauge will drop back down a little usually.

On my Pug 205 it used to cause some fun with the carb overheating, so if you stalled it you had to let it cool down (that carb was shot though )[/quote']

205's and 309's had a nasty habit of doing that on the GTI too. People would replace the starter motor with a pattern one and for some reason they couldn't take the heat, so they wouldn't work after a couple of months if the car was hot. I learnt my lesson after 2 pattern starters gave up on me in a matter of weeks, then I bought a genuine pug one and it lasted for the next 2 years you get what you pay for as they say...

Anyway, back on topic, has anybody fitted a turbo timer to their diesel or is it a) too difficult or not worth bothering with? I used to have one on my SX, it was great fun for confusing people as they saw you get out of the car with your keys in your hand and wander off, then have the car turn off all by itself a minute or two later

What does that do exactly, turbo-timer wise? does it basically keep the engine running, or just the cooling system parts?

Keeps the engine running for a set period to keep oil circulating around the turbo

Hmm - remembers automatics in America. Shudders...

Tnx for reply

Taken from the TDI club FAQ

15. Turbo Timers

Strictly speaking, these aren't performance items, but they are sometimes seen as aftermarket items on turbocharged gasoline engines. The purpose is to give the engine a prescribed period of idling so that the turbocharger can be cooled by the engine oil (and coolant, in many cases) that circulates through it. (It has NOTHING to do with waiting for the turbocharger to "spin down". That takes a quarter of a second.)

Diesel engines have lower exhaust temperature than gasoline engines. At anything less than full load, the temperature is FAR lower. It is low enough that the turbochargers in these vehicles do not have a connection to the engine coolant system - only to the lubricating oil. Under most conditions, there is no need to wait for the turbocharger to cool down, and hence, no need for a turbo timer.

The only potential exception is if you are towing a trailer or operating the vehicle at close to top speed (i.e. 160+ km/h) on the highway or climbing the side of a mountain pedal to the metal. But in most cases, you don't just come straight off such full load conditions and stop. You trickle through neighborhood streets, or you wander through a parking lot in search of a spot. Usually this is more than enough time even if you're driving the car hard. And if it DOES take less than a minute measured from the time you first take load off the engine (still coasting out on the road) until you get to a parking spot ... just let it finish that minute at idle.

You don't need a turbo timer.

Chris

I am using the same method on the furby that I used with my impreza, after a "spirited" drive I just take it very very easy for the last couple of miles and let the engine cool with some air flowing over it and then just switch it off when I get wherever I am going.

Worked fine on the Subaru and that was more fragile then my tractor

fluff'