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I just purchased my 2003 F 350 about a week ago and it is my first turbo diesel, i was just wondering for about how long should i let the engine run to get the turbo temp down before i shut it off? Does it depend on how it's driven. Would it be good to invest in a turbo timer? Any suggestions on good ones? Thanks
I wait till about 300 Degrees. With an intake and exhaust, they cool very fast. I wouldn't bother with Turbo timer. Spend your money on gauges instead.
I have noticed that even after driving hard it only takes a few blocks of easy driving to bring the egt down around 300. I wouldnt mess with a timer. Spend the money on a set of gauges.
Until you get an EGT gauge, here are a few rules of thumb:
- regular around town driving: wait maybe 15-30 seconds, if that, after getting to your parking spot.
- highway driving, then getting off the highway and parking right away: wait a minute or two.
- towing heavy and then parking quickly afterward: wait as much as 5-10 minutes.
That should help tide you over until you can get a pre-turbo EGT gauge installed to monitor the temps yourself.
Another thing I've learned by watching my EGT gauges when the truck is cooling down...turn off your AC. Set it on the vent only setting, on the left side of the dial or turn off the climate control completely. I've noticed it takes the EGT's a little longer to come down when the AC compressor is cycling.
And Ryan is right about heavy towing and parking quickly. It can take more than 5 minutes for the EGT's to come down. When I'm doing a lot of towing over the summer, pulling a trailer full of motorcycles, and we stop to get fuel, those EGT's can stay up there for quite a while - especially when the ambient temps climb way up there.
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