Turbo spool down

Hi,
I was reading about letting the turbo spool down for a minute after hard driving. This was in the engine break in portion of the manual. So are they advising you to do that for the life of the vehicle or only during the break in period? I’ve seen it talked about on the forum but I’m still not really clear on that. Any help would be appreciated. Thank you

 

I would allow the turbos to spool down(cool off) for the life of the vehicle.

 

Yeah I’ve totally been forgetting to do this. Whoops

 

Now tundras have a rather sophisticated turbo cooling taking place right out of the exhaust. There are water jackets on the exhaust headers to 'cool' down somewhat the air before it enters the turbo's turbine, in theory keeping the turbos guts cooler.

But yeah it would always help after being driven hard to allow for a 45-60 sec idle cool down before shutting off. If its like here in Austin, 103, I like to also shut off the A/C compressor a couple blocks before I get home to let the condensor/compressor cool off a bit before shutdown too.

And yeah keep up with those oil changes, what OCI does the manual recommend? My other turbo autos want new oil every 3500 miles.

 

Manual recommends 10k, unless you’re under severe duty, which I think most of us are. Then it’s 5k.

 

Unless you literally have the truck floored and then just instantly slam on the brakes and come to a stop and shut the engine off, no, you should not need to let them cool down.

Otherwise, in all other normal situations, you are giving the turbos enough time to cool as you are coming to a stop. There is coolant passing through them constantly. It does not take long for it to pull the heat out.

 

The 2 coolant pumps for the turbos are electric and can run after you turn it off. Though best practice to let them cool with the vehicle running.

 

Old turbo cars would have turbo timers installed to let the car idle and cool down the turbos and it was mostly an add-on to performance. The Tundra’s turbos don’t get excessively hot unless you’re driving with high boost, high rpm for extended periods of time. Just cruising at normal speeds even when towing cools down the system enough to let the turbos cool. I wouldn’t worry too much about this kind of thing unless you tow often up long, steep grades in 100+ weather.

 

Ok great… thank you all for the great information. Much appreciated.

 

Older cars may not have had water cooled turbos either. So all the heat trapped in the turbine and center housings would bake any oil still left in the bearings. My 2006 Jeep liberty CRD turbo was not water cooled, but I can't personally think of any cars since then that didn't have water cooled turbos. My 2007 Legacy GT was water cooled and those dated back to 2005.

Even on my jeep though, it really wasnt an issue. I had an EGT gauge mounted right at the entrance of the turbine housing and within 10 seconds of lifting off the gas the EGT's would drop to 400F or so.