I live in PA. Outside average temperature 20 -30 degree. I was wondering if two minutes is enough to warm up before take off on my way to work? My truck is still brand new and has 2000 miles on it. I was told diesel engine needs more time to warm up. It is not like gas engine. Thanks!
how long to warm up duramax before drive?
CAMEO
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Wet stacking occurs when diesel engines are operated at low RPM/Loads for extended periods of time not allowing the engine and exhaust to reach normal operating temps. Unburned fuel can then collect in the exhaust system due to cooling and condensing as it exits the turbo. It's very unlikely this would be an issue with modern day HPCR diesel engines since increased atomization over the older diesels allow a much more efficient burn and not many people leave their engine idling for hours and days on end.
Wet stacking is still an issue with HPCR diesels, but you're correct that it's to a lesser degree. However, ...
It's enough of an issue that nearly all of the newer small diesels from Europe, (and some being developed for North America), now have throttle control plates. These act similarly to the plates in a typical gasser throttle body, except that we don't control them; the computer does. The plate is not operated by the pedal, rather, it's opened via a servo motor in response to the computer program, to allow in only enough air for compression ignition. It prevents over supplying air, thereby keeping the charge from overcooling. In effect, it is there to control emmisions and wet-stacking.
Our current Dmax's don't have that feature, but they certainly are capable of wet-stacking. Just not to the extent that the ol' skool engines did.
Technology marches forward. To some degree, it benefits us (more power, cleaner operations, better economy, etc). On the downside, it's often driven by mandates we don't appreciate, (such as lower emmisions), because it get's in the way of what used to be a very simple engine control system. Compression ignition, mechanical fuel pump driven engines are about as simple as it gets.
It's enough of an issue that nearly all of the newer small diesels from Europe, (and some being developed for North America), now have throttle control plates. These act similarly to the plates in a typical gasser throttle body, except that we don't control them; the computer does. The plate is not operated by the pedal, rather, it's opened via a servo motor in response to the computer program, to allow in only enough air for compression ignition. It prevents over supplying air, thereby keeping the charge from overcooling. In effect, it is there to control emmisions and wet-stacking.
Our current Dmax's don't have that feature, but they certainly are capable of wet-stacking. Just not to the extent that the ol' skool engines did.
Technology marches forward. To some degree, it benefits us (more power, cleaner operations, better economy, etc). On the downside, it's often driven by mandates we don't appreciate, (such as lower emmisions), because it get's in the way of what used to be a very simple engine control system. Compression ignition, mechanical fuel pump driven engines are about as simple as it gets.
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Is wet stacking an issue with our Duramax HPCR engines. Certainly not....
Current day emission standards necessitate the use of precise fuel metering via the use of the engine ECM to prevent over fueling situations which is a requirement for wet stacking. A feat older mechanically timed injectors can't accomplish. (Leaning the mixture during periods of less BTU demand such as low RPM and reduced load) This is well documented by CAT, Cummins and some others engine manufacturers utilizing computer controlled pulse/width fuel delivery systems.Today even our large Cats compression and turbine gen sets utilize Adam III systems and EFC controls to precisely maintain optimum fuel delivery rates given the engine speed, load & temp. Part of our job is to stay up to speed through recurring training on current engine control systems and simply put wet stacking is an issue that isn't discussed to any degree when utilizing modern day fuel systems. IMO the word issue to any degree should not be used when discussing wet stacking and the Duramax engine. You would have a better chance of finding a needle in a haystack. If this were an issue you would think someone would have reported at least a single occurrence in the last 8+ years.
Current day emission standards necessitate the use of precise fuel metering via the use of the engine ECM to prevent over fueling situations which is a requirement for wet stacking. A feat older mechanically timed injectors can't accomplish. (Leaning the mixture during periods of less BTU demand such as low RPM and reduced load) This is well documented by CAT, Cummins and some others engine manufacturers utilizing computer controlled pulse/width fuel delivery systems.Today even our large Cats compression and turbine gen sets utilize Adam III systems and EFC controls to precisely maintain optimum fuel delivery rates given the engine speed, load & temp. Part of our job is to stay up to speed through recurring training on current engine control systems and simply put wet stacking is an issue that isn't discussed to any degree when utilizing modern day fuel systems. IMO the word issue to any degree should not be used when discussing wet stacking and the Duramax engine. You would have a better chance of finding a needle in a haystack. If this were an issue you would think someone would have reported at least a single occurrence in the last 8+ years.
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You should not need to warm up these trucks longer than 10 minutes, that is just wasting fuel. Modern engines and fuel injection have made it so that you no longer need to wait 20 minutes just to be able to move your truck forward and have it be sufficiently warmed up. Unless you are in a cold climate, then thats a different story.
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80 degrees sounds like a good plan.
Personally I usually take off a minute or so after verifying oil pressure. However, I'm fortunate to have a long street to allow a pretty good warm up before I hit the open highway. Then I still drive at a reduced speed until full warm up. Guess it really depends on the situation.
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mine warms up for about 15 minutes everyday, unless its summer. I plug it in too. I want all the fluids to have some heat to them the before i put any type of load on it, especially the transmission. I farm and been around diesel engines big and small all my life. I know what it takes to get a lot lot life out of them.
Set a bottle of engine oil outside over night when its 10 or 15 degrees and see how fast it pours out. Now picture that trying to be pumped through the engine or transmission.....
Set a bottle of engine oil outside over night when its 10 or 15 degrees and see how fast it pours out. Now picture that trying to be pumped through the engine or transmission.....
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Yeah, I'm pretty much with everybody else. The colder it gets the more I like to let it run for just a few minutes to get the fluids up to a reasonable temperature, then driving it (in most ways) is better than letting it idle. Though, when it's in the single digits like it is now, I don't like to shut it off when I know I'm going to be less than 15 minutes at a stop. Just my opinions.
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When I leave work at night (5:00) the speed limit is immediately 50mph. I'll let it sit for 5 minutes or more to let the temps get up a little and idle out the driveway before getting on the road. I try to go slow or even wait until I see the traffic light go to red to give me a little more time, but you get some people right on your ass and you have no choice but to increase speed, I just do it slowly. This is where the synthetics do make a difference, they flow through the engine much easier than dino when its in the teens and single digit numbers.
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in the winter i wait for the battery gauge to return to normal and then she goes on high idle for 2 min and im good to go. then i drive under 1500rpms until the temp needle moves.
summer time i wait for the abs warning lights to come on and stop making the beeping sound (i disconnected abs) and then shes in drive
summer time i wait for the abs warning lights to come on and stop making the beeping sound (i disconnected abs) and then shes in drive
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