How long and when do you let your turbo cool down? If I drive in the city, not using the turbo much, I never let myturbo cool down. If I drive on the freeway, I let the truck cool down for about 2-3 minutes after I am done with it.

Dima

 

I have a turbo cool down timer and let it run for about 2 minutes. I have never had to adjust it to let it cool down for more than that. The best way to know when the turbo is cool enough to shut'er down is to have a pyrometer, and don't crank her down when she's over 300 degrees, pre-turbo. But, I'm sure BigBlue will chime in here and give his opinion on his "cool down time" methods!!

(which will cost him a new turbo here pretty soon!!)

 

Your right, I am.

For 74k hard miles, I've never let my turbo cool down. Even when I had the comp. I just stop it and turn it off. It still spins freely and doesn't make any weird noises. I figure I've got at least another 74k hard miles on it before I replace it.

 

I let mine go down to 300* then shut it off.

 

I don't plug in (unless it''s really cold and the driveway's free) and I don't cool down, but I use Delvac1 so I don't have to feel so guilty about it.

CD

 

Bought the truck with 100,000kms don't know what the previous owner did. I installed gauges and let it get about 350f and shut it down.

 

I have enough patience to let it drop to 350°. Of course I do have a cool down timer, I usually just use it when towing.



Tony

 

300* here... cools down a LOT quicker w/ the HX40 than it did w/ the stock 35/12!

Forrest

 

I agree with the 300 degree number, I am just bad about practicing it. That is why I am getting the Isspro auto shutoff that shuts the engine down at 300 degrees for xmas.

 

it's probably more of a rain dance than anything... obviously can't hurt... sometimes it takes a while to get below 350-325, and if I'm in a hurry, I'll just shut it down. but 99% of the time, I wait till it hits 300.

Forrest

 

Ok, here's a question on the need? I don't drive hard. If I'm driving home up the interstate at 65 or so, I'm not working the turbo that hard. I get off at my exit and travel home (a couple of miles, probably 3 or 4 or more minutes.) But by the time I'm home, the engine has run at relatively low revs and under light loads. Do I really have to sit and let my engine idle in the driveway to cool down after that?

 

I have a timer and a guage, even cruising through my neighborhood at 25 mph for a mile temps are still high enough for 2 minutes of cool down,,, towing or blasting around town I cool down for 6 minutes, for some reason I never use 4 minutes. Now that I have the grill blocked for colder weather cool downs take a little longer.

 

I'd venture to say the the vast majority of diesel pickup owners (like approaching 100%) do not let their trucks idle to cool the turbo after casual driving like you describe. I certainly wouldn't.

 

driving around town is generally worse than highway driving... coasting at speed causes the EGT's to come down big time... much quicker than idling...

coming off the highway at 75mph and coasting down to 30 when exiting for fuel or something, my EGT's will hit 300 or below pretty quick...

my street has a slight slope to it... if I'm coming DOWN the street, I can coast down for about a block or less, and I'll be at 300... if I'm coming UP the street, I'm usually at 400 when I get to the house... and it takes a sec to hit 300.

like I said, the EGT's fall SO much quicker w/ the HX40-16 than they did w/ the stocker

 

When I'm haulin butt with the camper up the interstate(80mph) and do a quick p-stop,I'll leave it idle.But when I get off the interstate and do some side streets I just shut it down.