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Turbo Protection

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ASH M

Passed Driver's Ed
Location
South Africa
Hi Guys

I need you know whats your take on the cooling down of your vehicles turbocharger after a drive, be it down to the shops or a long run?

I know currently most vehicles are equipped with start-stop technology, so is GTi but isn't the start-stop preventing you from idling the vehicle and allowing the oil to cool the turbo down?

I find myself switching the start-stop off when I get home because it will switch off the engine in the driveway. So I'm sure this means the vehicle can be switched off at will and there's no need to cool the turbo down?

I've checked the owners manual and found nothing, there's not even a section on the turbocharger.
 
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gtiw7

Ready to race!
Location
cruising around
cool the turbo down!? I reckon you didn't own a turbod car in the past 10 years.

if it needs cooling the fan would stay on even after you shut the engine off. the vehicle definitely can be switched off at will.
that being said, to be honest I personally tend to give it 2-3 seconds before switching off after a spirited drive but even that is purely psychological :)
 
A

ASH M

Passed Driver's Ed
Location
South Africa
gtiw7 said:
cool the turbo down!? I reckon you didn't own a turbod car in the past 10 years.

if it needs cooling the fan would stay on even after you shut the engine off. the vehicle definitely can be switched off at will.
that being said, to be honest I personally tend to give it 2-3 seconds before switching off after a spirited drive but even that is purely psychological :)
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No I haven't owned a turbo car in a while. But a fan will not cool down the turbo.

The oil that's pumped around the turbo normally cools it while it isn't under load, meaning at idle. Hence you would normally idle the vehicle for a minute or two to circulate the oil in the turbo.

Btw, 10 years isn't much you can go back as far as you want, turbo designs have changed drastically but up till now they still use oil to lubricate and cool the turbo.

I however do hear a pump come on when the engine is off, I think this circulates the oil to help with cooling.
 
Avanti

Avanti

Go Kart Champion
Location
UK
ASH M said:
No I haven't owned a turbo car in a while. But a fan will not cool down the turbo.

The oil that's pumped around the turbo normally cools it while it isn't under load, meaning at idle. Hence you would normally idle the vehicle for a minute or two to circulate the oil in the turbo.

Btw, 10 years isn't much you can go back as far as you want, turbo designs have changed drastically but up till now they still use oil to lubricate and cool the turbo.

I however do hear a pump come on when the engine is off, I think this circulates the oil to help with cooling.
Click to expand...

Well the fact the manual doesn't state anything, then the owner doesn't have to take any extra precautions, this is my 3rd turbo'd car and the previous two had no issues , MK4 and MK5 GTI, the only thing I have really heard about (not on VW's ) is the rubber hose cracking and leaking in air, on some cars the vanes on the turbo used to go, but these were often if not always diesel versions.
 
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Geomets

Ready to race!
Location
South-Eastern Europe
Car(s)
Golf mk7 GTI
You don't have to worry about it. Did you notice the noise after shutting the engine down? The "electrical" one? It's the electric oil pump. It does circulate the oil for 5-10 minutes at its own will. So, the ECU knows what the oil temperature is and it operates the pump accordingly. I have to confess that I still leave the car idling for at least 3 minutes..!
 
A

ASH M

Passed Driver's Ed
Location
South Africa
ASH M said:
No I haven't owned a turbo car in a while. But a fan will not cool down the turbo.

The oil that's pumped around the turbo normally cools it while it isn't under load, meaning at idle. Hence you would normally idle the vehicle for a minute or two to circulate the oil in the turbo.

Btw, 10 years isn't much you can go back as far as you want, turbo designs have changed drastically but up till now they still use oil to lubricate and cool the turbo.

I however do hear a pump come on when the engine is off, I think this circulates the oil to help with cooling.
Click to expand...

Geomets said:
You don't have to worry about it. Did you notice the noise after shutting the engine down? The "electrical" one? It's the electric oil pump. It does circulate the oil for 5-10 minutes at its own will. So, the ECU knows what the oil temperature is and it operates the pump accordingly. I have to confess that I still leave the car idling for at least 3 minutes..!
Click to expand...

Thanks

This is exactly what I wanted to confirm.
 
martymim

martymim

Ready to race!
Location
Ireland
People get turbo timers that leave the car running for a couple of minutes after the car is switched off, they do nothing.
Dont trash the car until its heated up to 90 degrees.
Long story short if you give your car a bashing take the last couple of minutes driving home handy.
 
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gtiw7

Ready to race!
Location
cruising around
of course a fan "by itself" will not cool down the turbo. but that's the most noticeable and common noise that people notice when they switch the engine off. I didn't thought you would hear the pump coming on when the engine is off to cool the turbo.

bottom line is ECU will do it work keeping whatever hardware required to cool the turbo. this is my 4th turbo car (3rd GTI) and I never faced a problem in that matter :)
 
VolkyCakes

VolkyCakes

New member
Location
Slovenia
Coolant cools the turbo, oil lubricates it. You can argue that the oil as well cools the turbo, but that isn't it's primary function.

After-run coolant pump whines when you shut down your car to preserve the turbo bearings.
 
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Stueck9356

Ready to race!
Location
NC
I read somewhere that even if all of the pumps were off and the engine was shut down, if the turbo was hot, it would heat up the oil/water inside of it, causing a pressure difference that actually pumps the hot water out of the turbo, which in turn pumps cool water into it.

My miata had a GT2860RS and after turning the car off you could hear the turbo "burping" for a few minutes.

Could be blowing that out of my ass, but sounds plausible.

Sent from my SCH-I535 using Tapatalk
 
caffeineTX

caffeineTX

Ready to race!
Location
Houston
Coolant lines run through vw/Audi turbos. It with be fine.

Sent from my SAMSUNG-SGH-I747 using Tapatalk
 
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