Chevy and GMC Duramax Diesel Forum

Chevy and GMC Duramax Diesel Forum (
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The S.O.M. 11-25-2013 07:01 AM


Originally Posted by JOKER (Post 3760585)
4-stroke diesel engines like to be kept at high RPMs.

Good cuz I always try to keep mine above 3,000 rpm :cool:

Josh828LLY 11-25-2013 07:54 AM


Originally Posted by The S.O.M. (Post 3760737)
Good cuz I always try to keep mine above 3,000 rpm :cool:

I was about to say my trans would kill me but you took care of that! :thumb

OP really the biggest thing is let it warm up and cool down!

Army Diesel 11-25-2013 08:27 AM

People get the idea that because they own a diesel truck, that they can abuse the hell out of it and it will last forever, and that usually mean's abusing routine maintenance like oil changes, fuel filter changes, air filter changes and so forth. Just make sure that you have a strict maintenance schedule with a good oil and filter, fuel filter, air filter, transmission filter and so on. Some people also rev it sky high in the morning to warm it up, and treat it like a gas engine by driving it 5 minutes then shutting it off. That can lead to premature wear on the engine and turbo. I'd invest in an autostart and in the morning start it up and let it idle for awhile then when you get to x let it idle for 5 minutes before shutting it down. Get in it and under it once and awhile and check for problem's like leaks, lose drive shafts, abnormal tire wear, worn suspension part's like tie rod's and pitman arms. Some also get the idea since it's a diesel engine that they can throw a programmer or tuning at it and never worry about it breaking, then 100 mile's later they have a limped transmission. If you're looking for some tuning software look into EFI live; hundred's of page's of info on this site about it. I know a guy with a 6.0 PSD who does all of bad thing's i've mentioned combined, and I am just waiting for it to mess up and have him say "you were right." With that being said don't be afraid to drive you're truck hard, it deserve's it once in and a while.

rms 11-25-2013 10:44 AM

It takes a little more attention & a little more maintenance - but, it's a lot more fun. :thumb


ALLY Cat 11-25-2013 11:03 AM

The best investment you can make is to get an EGT gauge to monitor exhaust gas temperature. I keep EGTs below 1150 when towing heavy up steep grades by downshifting and idle down to <350 before shutoff. A short 1 minute warmup should be enough, just don't push it until it warms up. Also, I don't drive mine unless I'm going to be putting at least 15 miles on it, worst thing you can do to any vehicle is start it up, drive a short distance and shut it off.

premis 11-25-2013 03:23 PM


Originally Posted by KAWIracer772 (Post 3758242)
Ive also heard of rolling onto the gas? Not sure what that means, and heard of letting off the gas when the trans shifts. Any info is appreciated!

You don't need to let off for shifts, the truck will defuel on it's own.

As for rolling on the gas, That has more to do with using the trucks powerband. In a gas truck, if you want to pass a car you mash the gas pedal, let it kick down a gear and let the RPMs pulling you around the car. With a diesel you roll on the throttle, build boost, and let the turbo pull you around the car.

KAWIracer772 11-25-2013 06:04 PM

Thanks guys!

Aaron@LDS 11-25-2013 06:29 PM

Buy your fuel from busy stations that sell alot of Diesel. And keep your fuel filter changed every 10,000 miles.

Other tips...
-if you ever get a no-start... the odds are it's from air in the fuel system. There is a bleeder and primer button on top of the fuel filter. Prime it up till the bulb is hard to restart the truck.

I mention this becase (many people dont know) these Duramax's don't have a fuel pump that pushes fuel from he tank. It has a fuel pump in the motor that sucks fuel from the tank. Any air leak can cause a no-start.

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