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Duramax Third Generation: 2006-2007.5 (LBZ & LLY) Discuss the third generation (2006-2007.5 LBZ & LLY) of the 6.6L Duramax diesel engine & associated components. 2006 LLY engine discussion also belongs in this forum due to the similarities of the 2006 LBZ and the 2006 LLY. Engine related discussion ONLY. is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
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Old 08-06-2008, 02:58 PM   #1 (permalink)
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Startup Procedure

I was wondering what your guys' startup procedures are.

I know that there are a lot of people that get into their trucks and let it idle for 10 minutes before even putting it in gear (I KNOW THAT THIS IS OVERKILL).

I always figured on letting the oil pressure build for a minute and then your good to go. And same with shutdown, just let the oil pressure come down and shut her off.

I live about a 1/2-mile from the freeway and they dont want you to go over 25 mph. So I figured just start the truck, wait a moment, put it in gear and basically idle at 25 mph to the freeway and go. Then when I get to work 18 miles later, I pull off the freeway, drive down a backroad, park and then maybe wait a minute then shut down.

The point here is to let the oil pressure "stabilize" right?

Or do we even have to be this anal about our trucks?

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Old 08-06-2008, 03:41 PM   #2 (permalink)
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I think most peoples concerns on the shut down is more the temp than the pressure of the oil. As far as start up goes, I usually will let it idle for 30 sec or so, which IMO is fine, you either have oil pressure or you don't if you are lacking pressure you need to shut the truck off asap and address the problem asap anyways.

I look at it like this, you can do things to minimize the wear and tear on your truck, but they pay engineers a whole lot of money to develop an engine that "should" perform up to standards for a long time, if there was some magical startup/shutdown procedure that needed to be performed to assure long engine life then I am sure it would make its way into the manual.

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Old 08-06-2008, 05:01 PM   #3 (permalink)
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When starting I like to let the engine idle for 30 seconds or so and then take it EZ on her until the engine warms up. When shutting down let your engine idle for a short time and then turn it off. What I hate to see is the guys that start their engine then slam the trans into gear and mash the throttle to the floor ouch!
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Old 08-06-2008, 05:37 PM   #4 (permalink)
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Old 08-06-2008, 05:50 PM   #5 (permalink)
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the first thing i did with my truck was put a remote start alarm so that in the winter i can start it and let it warm up before hitting the road and in the summer so that the truck interior cools down a little here in tx black leather can sure burn your AZZ. and on most days i will start it and let it run for about 3to5 min and its ready to go. might also want to look at a turbo timer if you run your truck real hard
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Old 08-06-2008, 06:21 PM   #6 (permalink)
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i let mine idle for two min in the morning, then drive easy for five miles or so temp is up. on shut down depending on how hard was working my truck i let it idle for 1 to 5 min for the turbo to cool off.
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Old 08-06-2008, 09:33 PM   #7 (permalink)
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If its cold out, I'll idle it for a few minutes. Summer time, wait for oil pressure and drive away easy. The main thing to stay away from is beating on it when engine temps are low.
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Old 08-06-2008, 11:16 PM   #8 (permalink)
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Well guys this maybe way to anal for ya'll but this is how I do it. I put the key in the ignition and turn to "on" position I wait till all the dash lights go off except the red battery light, then I count to 10 slowly and then I start it up, the reason I wait on all the lights to go off is in case the "check engine light" goes off and comes right back on I can check the problem with EFI Live V2 before I hit the road. Then after that I hit the pre programmed seat button and the recirulate A/C button just a habbit since the truck was drove off the lot brand new lol. Now one I reach my destination I wait for the EGT's to drop as low as they will and then I turn my A/c to the lowest setting "1" and turn my radio all the way down and listen really close for the A/C pump to kick off its a little click in the cab under the passanger side of the dash, then I count to "5" slowly and turn'er off thats how I do it. Laugh all ya'll want to but I take extremely good care of my truck no joke.
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Old 08-07-2008, 09:50 AM   #9 (permalink)
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I start up the truck and wait for oil pressure to come up then wait 10 to 20 seconds. Run it easy till it warms up. Running her hard before full warm up shouldn't do much to the engine but diesels are really inefficient when they are cold. On shutdown just get the EGT's down. Most guys and gals have a different temperature that they look for before they will turn off the engine. I wait until I'm under 400 to prevent the turbo from cooking the oil.

Now in the winter my routine changes for startup. I start her up and wait til she kicks out of high idle before I drive off.

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Old 08-07-2008, 10:08 AM   #10 (permalink)
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I start it up and let it idle until the Voltage comes up. That gauge is a pretty good timer.

One of the reasons I wait on the gauge is so you have reverse (counter occassional converter drainback issue).

You drive gently for a few miles because the entire drivetrain is cold and should be warmed-up a bit before bing stomped on.

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