How long am i supposed to "cool" my turbo before shutdown I was reading and found this http://www.dieselsite.com/index.asp?PageAction=VIEWPROD&ProdID=880. So i was wondering how much good this box can do or is this just a a little money maker

shelton

 

Do you have a exhaust temp gauge ? If so, wait til it gets down to around 300 - 325*. Usually only takes about 15 seconds or so.. under normal driving.. However, if you are pulling a load and going up a hill , pulling into a rest stop, it will take much longer to cool everything down.. Again.. the gauge to will help determine the right amount of time..

 

The reasoning behind turbo timers is to allow the engine, and particularly the turbo housing, to cool down before shutting off the engine. Once the engine is shut off, oil flow to the turbo ceases, and any oil left in the turbo is thus subject to heat soak. At extremely high temperatures, this can "cook" the oil, causing coking.

That being said, I've never seen anyone post on any forum a turbo from a 7.3L being coked. Not to say it's impossible, but it seems to be such a rarity that it's never seen.

Years ago, it might have been an issue. However, motor oil that is in use today is more tolerant to high temps, and doesn't coke as easily.

Now gassers can have a higher risk of coking, simply because a gas engine runs higher EGT's than a diesel. Our turbo's run rather cool because diesels run lower EGT temps, so the coking issue remains pretty much non-existent. Some people say that EGT's should be down to 350 or 300 degrees before shutting off the engine. In my opinion, that's massive overkill. Sure if you run your EGT's up to 1200 degrees, then kill the engine immediately... then repeat over and over again, you'll end up coking the oil. But that constitutes serious abuse there.

For normal driving/towing/etc, there's really no danger. If you do run it really hard and then plan to shut the engine off, let it idle for a few seconds before stopping the engine.

 

300 deg? I usually let it get to 400 or under. Then shut it down. I thought I read somewhere that was good enough?

Sorry for the hijack.

 

Really depends on your truck and probe location.

Mine is in the drivers side manifold. At start-up I can keep it close to 300* but after it has been running, under 400* is ok to me. I just let it idle 20-30 seconds and it is usually there.

 

After pulling a heavy load I usually let it run for 5-10 minutes or until 300-350 on the pyro.

Just normal unloaded driving I let it run a minute or two and same 300-350 on the pyro. Usually takes less then a minute.

 

I have had the trubo lifesaver on my truck for 10 years know and think it is worth it like it vary much. When you are on road pulling a load you can pull in to rest stop set timer go in and come out with shuting down engine. You can use it as a anti theft too.Use to trun over engine befor starting wene truck has not been run for a long time.