5 minutes for the turbo to slow down.

[Josef]

I've heard it's very important and then I've heard it's
not important, I don't know why it took me so long to
post.
I have always tried to do the 5 minutes until I
left it running all night. My son won't even try for the
same reason as he forgot it running.

 

[85Hokie]

always allow the turbo to cool off a bit ........a couple of minutes....
even if for 2 !

 

[North Idaho Wolfman]

Yes like 85Hokie said, even if you give it a couple of minutes to cool and to get well oiled before shutting it down will save you a early turbo repair.

 

[TripleR]

I give mine about two minutes or so to cool down depending on how hard I ran it. I've never done five.

 

[Tooljunkie]

Idle down last few minutes as you return it to its parking place.even my lawn tractor gets a little idle time before i shut it down. If you ever saw how hot a turbocharger gets you would then understand.

 

[BruceP]

The amount of time allowed for turbocharger to cool off is based on loading and work you were doing.

If you were pulling a 12-gang plow thru clay for the last 2 hours..... give the turbocharger the full 5 minutes.

Beware that AS SOON as you unload the engine, the cooldown commences. For most situations, the time it takes to unhitch the implement and take the tractor to the toolshed is plently of time for cooldown.

BTW: All turbochargers need to be cooled down. This includes Ford eco-boost and many other modern vehicles.

My turbocharged Subaru Baja has a specially-designed cooling-system which takes advantage of convection coolant flow after enigne shutdown. My ol' 2003 diesel had an OIL COOLED turbocharger which required extra cooldown (No antifreeze flowing thru turbocharger!)

 

[lugbolt]

A lot of people blow this way out of proportion. Is it important? Yes. Will not allowing a few minutes of idle hurt it? In the short term, probably not. Long term...maybe.

The automotive aftermarket has a timer that delays engine shut down until the turbo cools. It's really a ricer gimmick, IMO.

Millions of engines employ oil cooled only turbos and they last a long time given the abuse that they take. I've seen more failed water cooled turbos than oil cooled jobs, but that's automotive only-not tractors or big trucks.

Good clean oil and good clean air, and the turbo will usually last the life of the equipment that it's on. They're a LOT tougher than people think they are. I had one on my G1900 for a while and had no oil lines to/from the turbo. Lasted a long time like that too. I lubricated it before I mowed by using an oil can just dripping oil down into the hole, lower hole plugged so it wouldn't run out.

 

[groomerbuck]

Rule of thumb is allow as much cool down time at ideal as you do warm up. So a couple mins is fine.

 

[CaveCreekRay]

Aren't most auto turbos water cooled now?

My wife's VW used to have a coolant pump that would circulate water after shutdown for a few minutes in summer. Never ran in winter.

 

[windzer]

And don't forget that turbine in that turbo is spinning at 100k plus rpms it takes a little bit for that thing to slow down so if u park your tractor and shut it off that turbine is still spinning and now it doesn't have engine oil pressure pumping oil to the bearing so it will wear out faster

 

[Josef]

And don't forget that turbine in that turbo is spinning at 100k plus rpms it takes a little bit for that thing to slow down so if u park your tractor and shut it off that turbine is still spinning and now it doesn't have engine oil pressure pumping oil to the bearing so it will wear out faster

What would the turbo slow down to after a 2-5 minute idle??

 

[bucktail]

About the same as it slows to after 30 seconds or so. The real reason for the longer cool down is to cool it off. The turbo gets pretty hot and it will break down the oil that is left in it after shutdown.

 

[nickelplated5s]

Aren't most auto turbos water cooled now?

My wife's VW used to have a coolant pump that would circulate water after shutdown for a few minutes in summer. Never ran in winter.

Some are and some have a thermo/timer. The bearings are oil bath at the least and that's what cooks off if you shut it down smoking hot.