Cool down Powerstroke

[NCHornet]

Actually the recommended temp for shut down is 300 degrees, if you have just been running her hard this can take a couple minutes. I got tired of waiting in the truck for cool down while the wife runs into the store so I installed a Brite Box Turbo Lifesaver and I love it. I can set it for extended run times out to 150 min, it also has a small kill switch that I have hidden for when I go into the city. If I let mine idle it will cool down to 275, usually I am down to 300 or below within 1 min. Good thing these things use very little fuel at idle, and wetstacking is not an issue with out trucks due to the cold temp pkg. If you don't want to sit there I suggest getting a turbo timer. BTW. If somebody did try and steal it as soon as they hit the brake pedal (which they need to do to put it in gear) the truck cuts off right away and can't be started.

[99Smokin73Stroker]

Well like I said normal temp as i'm slowing down to a stop is around 400, and by the time I stop completely to park it's a lot cooler. Most guys who are driving normally aren't going to sit and let it idle just to lose a few degrees. It's not going to hurt anything. I've read from a few reputable sources that turbo technology is much greater than it was years back and the cool down time isn't as necessary as it was back in the day. Unless i've been running it hard or I notice the gauge is pretty warm.....i'm going to park,shut it off and get to my business.

[super_stroke]

300*???? my probe is post turbo and never gets below 375*. even after i go in the gas station and out its still around 375*.

[NCHornet]

That is one good reason to change your probe to pre turbo. A post turbo probe isn't really telling you anything useful. There is no magic number to add and say that is what your pre turbo temps are. Thos that have had probes in both locations at the same time report the differences ran from 0 degrees to as much as 5-6 hundred. My truck will quickly cool to 275 usually under a minute under normal driving.
Coking is still a very real problem even with our high tech turbos. I have a friend who is a diesel mechanic at Ford and they see a lot of it.

[mschn99]

it is VERY rare to see a coked turbo in a 7.3, and in the 6.0 its more common but its NOT caused by warm shutdown. Cooldown isnt needed for 99% of shutdowns unless it has been run VERY hard right before you stop the truck