Owners of Turbo cars, do you strictly follow the 30 second "cooldown" ?"
-
The Mazda manual says this:
A related thread on the topic- https://www.mazdas247.com/forum/index.php?threads/turbocharger-information-that-was-a-bit-alarming.123867858/
I assumed modern turbo cars took care of these things, but want to hear your opinions as well -
@kingt I do tend to make sure I'm not right on the heels of a high boost / high load situation right before shutting the car off.
-
@kingt Nope. My Abarth does the cooling even after I shut it off.
-
I've never heard of that. Certainly didn't follow it with my turbo car!
-
@kingt If oil coking is an issue with your turbo setup, thirty seconds isn't going to do a whole lot. I think dedicated turbo timers would let the car run for several minutes.
Many cars run electric water pumps which will keep circulating coolant even after the engine is turned off.
-
@kingt I had a "turbo timer" in my STi. I let any car idle for a few before I shut it off after I have been romping on it, just to make sure were all good;)
-
If you think about it, the turbo will cool down significantly in just the time it takes you to get off the highway and slowly make your way to a parking spot at a rest area or a pump at a gas station. Seems like this is just warning you not to go from 80 to full stop to engine shut-off immediately.
-
@kingt In the ST I always let the car idle for around 30-40 seconds before shutting it off. I always tried to keep rpm low and stay out of boost until the car had been decently warmed up.
(the prairie peeps are going to mock me for this) Anything below 10 degrees, I would usually plug in the ST's block heater overnight. Just to start with some warmer oil before my 5-10 minute drive to the merge onto the freeway.
-
Pretty much. That said, after a long (or aggressive) drive in any car I'll let it run / idle for a bit to normalize and cool down. Let the water pump (and oil pump) do its job and circulate fluids to move the heat from the extra-hot bits.
The fiata audibly runs a pump for a little while (I believe coolant) to cool the turbo when you shut it off at operating temperature, which is nice.
-
@kingt Not under normal circumstances but I'd let it cool off a bit if I'd been hammering it immediately before shutting it down. I'd do that with a NA engine too, though.
Pretty sure most if not all modern cars have a separate electric cooling pump that circulates oil or water through the turbo after shutdown if necessary - one of the many clicks and whirrs you hear from a modern engine after it stops. The issue with the old ones was letting oil sit stationary in the bearings while heat seeped into them along the shaft from the red-hot exhaust turbine - that could let the oil get hot enough to break down and leave deposits on the bearings, causing premature wear.
-
@kingt You can choose to believe the engineers who built the car, or the random posters on a home-brewed interwerbs site.
("home-brewed" meant in a friendly cheeky way)
-
This is the first I've ever heard of this. Then again, I've never owned a turbocharged car.
-
@darkbrador said in Owners of Turbo cars, do you strictly follow the 30 second "cooldown" ?":
@kingt You can choose to believe the
engineers who built the carlawyers who try to disclaim responsbility for every problem, or the random posters on a home-brewed interwerbs site.FTFY
-
@chariotoflove This is my first ever Turbo car so just wanna be sure
-
@musashi66 said in Owners of Turbo cars, do you strictly follow the 30 second "cooldown" ?":
@kingt Nope. My Abarth does the cooling even after I shut it off.
My Veloster Turbo did as well.
-
@darkbrador said in Owners of Turbo cars, do you strictly follow the 30 second "cooldown" ?":
@kingt You can choose to believe the engineers who built the car, or the random posters on a home-brewed interwerbs site.
("home-brewed" meant in a friendly cheeky way)
You can also choose to believe that engineers wrote the service manual.
-
I did in my A4. But that was mostly because I was afraid of something else breaking
-
@kingt No. My S60 keeps cooling after you turn it off anyway, but I generally didn't do it with my S40 either. Normally you have a good period of lower speed driving anyway before parking. I guess worst case would pulling into a highway rest area/gas station or something.
-
@kingt said in Owners of Turbo cars, do you strictly follow the 30 second "cooldown" ?":
I assumed modern turbo cars took care of these things, but want to hear your opinions as well
With my 2000 Audi S4, I do the idle cooldown. I too assumed modern turbo cars took car of that so I don't do a cool down on my 2017 Transit Ecoboost but I'll have to recheck my Transit's OM now. I do the same as @flatisflat .
@flatisflat said in Owners of Turbo cars, do you strictly follow the 30 second "cooldown" ?":
@kingt I do tend to make sure I'm not right on the heels of a high boost / high load situation right before shutting the car off.
-
@carsoffortlangley 10 degrees and I'm not even warming up the car...
-
When I had my Saab 9-3, I would take it easy on the throttle until it warmed up.
And typically I would also take it easy for the last minute of driving before parking and turning it off if I happened to be driving hard.
-
@kingt I do not. But for the drives that I am hard on the engine, I do deliberately drive the last mile under 3k rpm, with a mix of coasting and light throttle inputs.
-
@carsoffortlangley overkill is better than underkill!
-
@KingT My Transit does say something vaguely along those lines but I'm interpreting it as take your foot off the gas pedal before you shut off the engine, you dumbass! So no, Ford's turbo does not have your warning.
-
@kingt BMW keeps the coolant and oil flowing after engine shutoff on turbo cars. But...that doesn't seem to help them be reliable.
Back in the days many many tuned turbo car owners had electronic boost controllers and turbo timers wedged into unoccupied single-DIN pockets installed under single-DIN radios in double-DIN dashes.
