Turbo Damage

[jonela]

I have a friend who lives in Gurnsey and has a house over here which i am working on at the moment.
I have noticed that when ever he arrives he gets out of the car and leves it running for several minuets before he switches it off.
Now this is a real petol head ,a mechanic for 45 years he's 67 He Has 7 cars, A 2lt toyota celica, a Datson GT2000 1975
Two skylines, A ponteac firebird.A 1974 Transit camper van and another I cant remember, as well as Three Triumph motorcycles
So You could say he knows what he is talking about!
When I asked him why, he said Any car with a turbo should be left running for a few minuets after a journey long enough to get the turbo hot,as just switching it off can damage the turbo.
In fact he said it is possible to get a timer so you can switch the ignition off and lock the car but still leave the engine running for several minuets.
Is this something we should all be doing, and what sot of damage are we talking about?

 

[Lincs Mav]

I was told to leave it running afterwards. I do leave mine running but only for a minute.

Cheers Gav

 

[paulp]

Turbo damage

I do the same especially if been hacking it down the motorway

paulp

 

[Andy L]

I think you will find that analogy might have been true years ago but modern day oils and modern day turbo construction mean it has become outdated.
IIRC the first Saab Turbo's had a timed electric oil pump to cool the turbo after use but that was how long ago? do they need them now?

Andy

 

[rustic]

I think you will find that analogy might have been true years ago but modern day oils and modern day turbo construction mean it has become outdated.
IIRC the first Saab Turbo's had a timed electric oil pump to cool the turbo after use but that was how long ago? do they need them now?

Andy

In the old days, PRE TURBO... 70's ... it was a habit of some drivers to rev the engine just before turning it off. Not a habit to continue with where a turbo is fitted.

After a run , I do the last mile with out too much throttle, then when I put it in the garage, let it tick over, so the turbo slows down, before switching off.

It is the high speed running of the turbo, that continues with no oil feed once you turn the engine off that causes the excessive wear.


So has anyone who's turbo has failed prematurely advise what their technique was at switch off, and advise how many miles it had done.:nenau


Mine at 98 k is original, no oil consumption, and I let the revs drop before switching off, but only for a short time, never several minutes.:thumb2

 

[Lazy-Ferret]

When I got my new turbo, in the instructions it said to run the car for a further minute after hard driving, as it allows the turbo to cool.

It said that if you just switch off, the oil in the thin oil ways will boil, and could block the oil ways, so by running for a bit longer with the engine pumping oil, and water but the turbo run down, it should help to stop this problem.

So after towing, I always leave the car ticking over while I unhitch the caravan and push it into the drive, then reverse the car into the driveway and switch off.

Like Rustic, when I have been Motorway driving, I drive it easy on the last couple of miles to allow the car to cool off a bit.

 

[firebobby]

After towing, the last half mile of the journey home is down hill, so I allow the engine to idle.
I also do this when we arrive on site.
If you drive the car hard and then just turn the engine off, you have a higher chance of turbo damage.

 

[Banshee]

I'm sure this question has been asked before and Rick basically said that it didn't matter with newer turbos

 

[jonela]

A couple of conflicting views ,but the consensus seems to be that it is advisable to let it run on for a short time even with modern turbos , and lets remember not many of us have modern turbos as most of us have trucks over 10 years old, so as rustic said I wonder how meany turbos have bit the dust due to failure to do so. I certainly didn't know about this so how many others don't

 

[johnb5177]

New....old....I don`t know what that means really....so I err on the side of caution, and leave the engine idling for a few minutes after any sustained high speed drive, or a short fast thrash :thumb2

 

[Banshee]

I'd rather knacker my turbo, more reason to replace it then for one off a Scania!!!!

 

[briggie]

I had a turbo timer on my bighorn :naughty

 

[solarman216]

I'm sure this question has been asked before and Rick basically said that it didn't matter with newer turbos

If I said that I must of been pissed, or it has been taken out of context, always let the engine idle for a minute or two, to at least slow down and cool down a bit before shutting of its oil supply, and never ever blip the throttle befor shutting down, golden rules for a turbo, Rick

 

[Sweety]

I've always let mine tick over for a few mins before switching off the engine & this is just for the shorter runs but longer runs of higher speeds I have left it ticking over for 5 mins easy or a bit longer when the under bonnet temps have very high (you can see the heat poring out of the bonnet scoop).

 

[AlexD333]

Blimey I feel like an abuser now :doh

How much is oneadem turbo timers? :naughty

 

[briggie]

I think mine said concorde electronics on it

 

[briggie]

I believe they are illegal though

 

[rayf3262]

I believe they are illegal though

Only illegal if you leave the vehicle running on a public highway unattended....

 

[rustic]

Blimey I feel like an abuser now :doh
How much is oneadem turbo timers? :naughty

Don't worry about it... it's not just a timer, but it probaly incorporates an electric oil pump too, to feed the bearings on the turbo.
Not something easy to fit, but is more likely to go wrong, and wreck your turbo if an after market device.

So simply, don't switch off an engine that has just been running at high revs, as the turbo will be running at several thousand rpm, for quite a while...

 

[AlexD333]

I believe they are illegal though

Don't worry about it... it's not just a timer, but it probaly incorporates an electric oil pump too, to feed the bearings on the turbo.
Not something easy to fit, but is more likely to go wrong, and wreck your turbo if an after market device.

So simply, don't switch off an engine that has just been running at high revs, as the turbo will be running at several thousand rpm, for quite a while...

Cool good shout, I was checking manuals online, the units are cheap,but seems splicing of wiring is essential.

I will just wait for a minute