Turbo Noob... let turbos cool down after driving?

[angeleye540i]

I've read very conflicting things about these turbos... I do understand historically and mechanically how turbos function, however, I know things have changed as tech gets more advanced... Is it nesesary to let it idle and cool the turbos? If not why not? I've heard the bearings are ceramic and water cooled? Is this true ? Or at least partially true? Thanks ahead for the tips...

I know older oil cooled turbos especially none synthetic run Motors can carbonize crud onto the bearings and cook onto the turbs... Are turbo timers and cool down a thing of the past?

[Bill837]

Don't know about these specifically, but they should be designed, as was the turbo in my SRT-4 Neon, so that coolant warmed by the turbo rises and draws cooler liquid up into the turbo even after shutdown. Called thermal siphoning. If you are doing track days, or make it a habit to be running full boogey right before shutdown, you should allow a minute even if you do have such a system in place.

[angeleye540i]

Yeah ok so they are water cooled which is good... Always good to let them sit and cool
While not under boost tho... 60 sec seems fair, I usually try to just drag ass alittle cuz I'm so used to pulling up and jumping out..

[fun2drive]

There is no point in letting the turbos cool down unless you ran it super hard lots of boost pulled in some place and shut it down. BMW designed this engine to not coke turbos...

[angeleye540i]

There is no point in letting the turbos cool down unless you ran it super hard lots of boost pulled in some place and shut it down. BMW designed this engine to not coke turbos... yeah one would think that would be the case... And all
Makes sense...

Now anyone feel like commenting on my Mod thread feel free to... Cheers

[Pilgrim]

Cooling down is one thing - it doesn't hurt at any time, but if you've been running hard, it's a good idea.

Another aspect is that if you pull over and shut off the engine, the turbo may still be spinning - not a good thing when the oil pressure drops. It never hurts to idle for 30 seconds to avoid this.

Mandatory? No, but it doesn't hurt and can help. Using these rules I've made a 1983 vintage 280ZX turbo that has no water cooling (oil only) and no after-run protection run 76,000 trouble-free miles since 1990. Newer cars have water cooling and some have turbo timers, but playing safe doesn't hurt a thing.

[angeleye540i]

All truth and I have been playing probly way too safe... At any rate, I will be taking every avoidance procedure possible