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What causes a Duramax diesel engine to heat up?

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What causes a Duramax diesel engine to heat up?

When the engine is working hard, the turbocharger is drawing in a ton of air, and the restrictive stock turbo inlet tube can effectively choke the VGT turbocharger causing the compressor outlet temperature to skyrocket, heating up the intercooler, and ultimately raising the temperature of combustion and the coolant temp.

Are there any problems with the LLY Duramax?

In terms of LLY injector problems, GM had sorted out the internal failures with the 2004 ½ redesign, but the LLY Duramax would occasionally exhibit a trouble code for the injectors, but in most cases it turned out to be an issue with the injector harness rubbing through and causing a short or open in the wiring.

What causes a Duramax injection pump to fail?

As a result (allegedly), the lack of lubrication in the fuel can cause a premature failure of the injection pump, to a point where it won’t allow the LML Duramax to run. You can be driving down the road and everything seems normal, and when the pump fails, the truck just shuts off.

How much power does a Duramax Diesel have?

Power was at an all-time high coming in at 397hp and 765 pounds of torque, and in order to provide this much power while still keeping pollutants low, GM needed to be able to increase the pressure in the fuel system to levels above what the tried-and-true CP3 could safely deliver.

Are there any problems with the GM Duramax?

In stock form and even when substantially modified, GM’s legendary V8 diesel can provide hundreds of thousands of miles of trouble-free use. Still, and just as we exposed the shortcomings of the almighty Cummins, the Duramax isn’t without its flaws—some of them catastrophic.

How many versions of the Duramax diesel engine are there?

All told, there are six different iterations of the Duramax diesel engine: LB7, LLY, LBZ, LMM, LML, and L5P spanning from 2001 to the present day. Each version of the engine has its own issues and quirks, and some are less problematic than others.

How can I Keep my Duramax Diesel pump healthy?

However, there are measures you can take to keep the pump happy and healthy, the first being to always buy your diesel from a high-traffic, reputable filling station that’s known to dispense good, clean fuel. Second, always change the fuel filter at or before the recommended service interval.

Can a Duramax engine run in the Cold?

The only question I can’t answer is how the new smaller duramax engine does specifically in the cold. I could always Start my 2015 Ram with a Cummins without plugging it in until -22F but after that it got cranky and didn’t run great so I would plug it in after that.

Where to test diesel trucks in cold weather?

All that being said, I will say, you will rarely see diesel pickups in lumber camps in Northern Ontario (GM cold weather testing used to be in Hearst Ontario) because there is no hydro in the bush to plug trucks in. Again, not a DEF issue but rather a cold start issue.

What should I put on my Duramax in the winter?

Put extra anti gel in the winter. Never had a problem even in -14 F unheated out side and engine block heater not plugged in. Always use Lucas Anti-Gel and Lucas Cetane Boost. Can’t speak for the DEF problem sure glad I don’t have use it.

Do you need a Duramax Diesel in Florida?

You wouldn’t need in Florida, but sure as hell would where I go in the cold mountains. I can assure everyone, there is no issue with DEF and it freezing and thawing up here in Canada.

When did the Chevy Silverado 2500HD come out?

1st owner purchased on 11/21/04 and owned in MT until 02/16/07 • 2nd owner purchased on 02/16/07 and owned in MT until 03/12/21. 1st owner drove an estimated 0 miles/year • 2nd owner drove an estimated 12,741 miles/year.

When to plug in block heater in Chevy 2500HD?

When plugged in, the block heater helps warm the Duramax engine to provide easier starting and better fuel economy in temperatures below 0 degrees Fahrenheit. The block heater should be left plugged in for at least four hours before starting the Chevy 2500HD in cold weather. Pull the hood release lever on the left side of the driver’s foot well.

Where was the 2004 Chevy Silverado 2500HD last serviced?

1st owner drove an estimated 13,621 miles/year • 2nd owner drove an estimated 10,140 miles/year • 3rd owner drove an estimated 8,888 miles/year. Last serviced at 178,455 miles in Sevierville, TN on 03/26/19 • Vehicle serviced. Mileage: 194,602 miles Body Type: Pickup Color: Silver Engine: 8 Cyl 6.0 L No accident or damage reported to CARFAX.

When the engine is working hard, the turbocharger is drawing in a ton of air, and the restrictive stock turbo inlet tube can effectively choke the VGT turbocharger causing the compressor outlet temperature to skyrocket, heating up the intercooler, and ultimately raising the temperature of combustion and the coolant temp.

What kind of engine does GMC Sierra 2500HD have?

Mileage: 113,214 miles Body Type: Pickup Color: White Engine: 8 Cyl 6.0 L Description: Used 2004 GMC Sierra 2500HD SLE with RWD, Keyless Entry, Fog Lights, Chrome Wheels, 16 Inch Wheels, Front Bench Seat, and Rear Bench Seat 2004 GMC Sierra 2500HD SLT 18 Photos

When plugged in, the block heater helps warm the Duramax engine to provide easier starting and better fuel economy in temperatures below 0 degrees Fahrenheit. The block heater should be left plugged in for at least four hours before starting the Chevy 2500HD in cold weather. Pull the hood release lever on the left side of the driver’s foot well.

1st owner drove an estimated 13,621 miles/year • 2nd owner drove an estimated 10,140 miles/year • 3rd owner drove an estimated 8,888 miles/year. Last serviced at 178,455 miles in Sevierville, TN on 03/26/19 • Vehicle serviced. Mileage: 194,602 miles Body Type: Pickup Color: Silver Engine: 8 Cyl 6.0 L No accident or damage reported to CARFAX.

Why does my Chevy Silverado keep blowing hot air?

From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. I would check the charge in the system. You might be just a little low on refrigerant. (Low enough to intermittantly trip the “Low-pressure” switch.)

What makes a Duramax LB7 diesel so special?

The introduction of common rail injection powered by the Bosch CP3 injection pump made the LB7 Duramax stand apart from other diesels of the day with excellent power and efficiency.

What is the absolute pressure of the intake manifold?

The MAP sensor measures the absolute pressure inside the intake manifold of the engine. At sea level, atmospheric pressure is about 14.7 psi (pounds per square inch). When the engine is off, the absolute pressure inside the intake equals atmospheric pressure, so the MAP will indicate about 14.7 psi.

What are the symptoms of a bad manifold absolute pressure sensor?

Common signs of manifold absolute pressure sensor problems include excessive fuel consumption, lack of power, and failing an emissions test. 1. Excessive fuel consumption 2. Lack of power

What should the oil pressure be on a Chevy Silverado?

Check the voltage to the gauge it should be a steady 12-13.5 volts. — A oil pressure gauge in actually a voltage gauge with a different face. 12 volts on the supply side and the sending unit actually varies the resistance to ground.

How big is a 6.6 liter Duramax engine?

2008-2010 GMC Sierra & Chevy Silverado HD 6.6L LMM Duramax Specs Manufactured Years: 2007.5-2010 Displacement: 6.6 Liters or 403 Cubic Inches Engine Weight: 835 Lbs Bore: 4.055″ or 103 mm Stroke: 3.897″ or 99 mm

What kind of compression ratio does a Duramax have?

2008-2010 GMC Sierra & Chevy Silverado HD 6.6L LMM Duramax Specs Manufactured Years: 2007.5-2010 Compression Ratio: 16.8:1 Firing Order: 1-2-7-8-4-5-6-3 Turbocharger/Air: Garrett GT3788VA Variable Vane Turbochar Fuel Injection: Direct Injection High Pressure Common Ra

What should the oil pressure be in a truck?

When truck is first started, oil pressure is normal, around 40 psi. When engine temp starts up, oil pressure slowly falls until “Stop Engine – Low Oil Pressure” warning comes on. Switch truck off a few second, maybe 20-30, restart truck and back to 40.

Thanks to a 17.5:1 compression ratio (the highest of any other engines in the Duramax lineage), extreme amounts of low-rpm cylinder pressure (i.e. torque) can be present when you’ve more than doubled the factory horsepower and torque rating.

What kind of engine does a 2003 Chevy Silverado have?

Redesigned for 2003 and equipped with a standard 6.0-liter V8, the 2003 Chevy Silverado 2500HD comes available in Base, LS and LT trim levels with your choice of 4WD and a 4-speed automatic or a 5-speed manual transmission depending on the model.

Power was at an all-time high coming in at 397hp and 765 pounds of torque, and in order to provide this much power while still keeping pollutants low, GM needed to be able to increase the pressure in the fuel system to levels above what the tried-and-true CP3 could safely deliver.

Which is the best lift pump for a Duramax?

The FASS Titanium Signature Series Lift Pump is an excellent upgrade for any Duramax. When GM changed body styles with the 2008 Duramax, the redesign coincided with some new regulations from the EPA regarding emissions equipment on light duty trucks.

In terms of LLY injector problems, GM had sorted out the internal failures with the 2004 ½ redesign, but the LLY Duramax would occasionally exhibit a trouble code for the injectors, but in most cases it turned out to be an issue with the injector harness rubbing through and causing a short or open in the wiring.

What causes hot air to blow out of driver side vents?

2004 silverado – hot air blows out of driver side vents, pass side stays cold. Restart the truck, it returns to normal. Click to expand… Give this a try before you starting taking the dash out and buying parts. Same thing has happened to me a few times in the past. Usually just the passengers side.

As a result (allegedly), the lack of lubrication in the fuel can cause a premature failure of the injection pump, to a point where it won’t allow the LML Duramax to run. You can be driving down the road and everything seems normal, and when the pump fails, the truck just shuts off.

Are there any bad changes to a diesel engine?

It is only natural to think that any EPA induced changes to the diesel engine is necessarily a bad one however it is quite the contrary. The major diesel manufacturers discovered it can fine tune the engine anyway it deems fit then allow the SRC and DEF to remove the particulate.

Can a late model diesel engine get compression?

On the late model diesel engine, accessing a point to get the compression can be a time consuming task and there are easier ways. Stop and think about engine compression.

What are the symptoms of a bad ECM power relay?

A bad relay may cause the vehicle to crank, but not start, or sometimes not even crank at all. 3. Battery drain or dead battery. A failed ECM power relay can also cause a battery drain or dead battery. If the relay shorts it can leave power on to the computer, even when the vehicle is turned off.

On the late model diesel engine, accessing a point to get the compression can be a time consuming task and there are easier ways. Stop and think about engine compression.

Which is the best 6.6 Duramax engine to buy?

Just like the LBZ was the best pre-emissions 6.6 Duramax engine, the L5P is the best post-emissions Duramax. All the problems associated with emissions system and injection pump have been taken care of, and for 2017 GM switched suppliers of the injection pump from Bosch to Denso.

What causes a Duramax to overheat in the summer?

Overheating typically occurs while towing in the Summer months, and is most prevalent in 2005 or earlier models (2006+ models received a larger radiator and fan). Overheating often occurs as a result of a fan clutch failure, preventing the engine fan from providing supplemental airflow as necessary to keep the engine from overheating.

Are there any known serious problems with the 2006 Duramax?

It was a lease return when I bought it in June 2007 with high mileage for its age, but did not appear to have been abused. Are there any known serious problems with the 2006 Duramax, or things that I should watch for? I’m not concerned about the transmission cooler lines, and small stuff like that.

Are there any problems with the Duramax water pump?

This seems to be inherent of the factory water pump design. Overheating issues with the Duramax diesel seems to be a hit-or-miss problem; some owners experience it, while others never will. Regardless, it’s more common with the Duramax than other engines.

What are the most common LLY Duramax engine problems?

The 6 Most Common LLY Duramax Problems. 1 1. LLY Bent Rods. While the LLY made competitive performance numbers back in 2004, the engine is certainly not competitive to the modern day diesels. 2 2. Head Gasket Failure – LLY Duramax. 3 3. EGR Valve Failure. 4 4. Glow Plug Failue – 2006 LLY Duramax. 5 5. Overheating in Pre-2006 Models. More items

Why does my car have no air in the vents?

Step 3 – A fan blower motor is controlled by either a switch in the passenger compartment or by a computer. If this fan motor is starting to fail it will cause the fan motor to run at a lower speed resulting in low air flow. To test this condition an amp meter is needed, connect the meter lead to the power wire of the fan motor.

Where are the vents on my GMC Sierra?

No output on dash face vents or defrost vents but floor works ok. I have tried the pulling the fuses both under hood and left of dash but that did not fix my problem.

Step 3 – A fan blower motor is controlled by either a switch in the passenger compartment or by a computer. If this fan motor is starting to fail it will cause the fan motor to run at a lower speed resulting in low air flow. To test this condition an amp meter is needed, connect the meter lead to the power wire of the fan motor.

No output on dash face vents or defrost vents but floor works ok. I have tried the pulling the fuses both under hood and left of dash but that did not fix my problem.

How do I stop no air from dashboard vents?

This door is controlled by a thumb wheel that when activated will open and close the vent air flow door. Work the thumb wheel from one side to the other while checking the airflow. The flow should stop and start again, if the thumb wheel does not make a difference the problem is somewhere else.

How to troubleshoot and repair vents low air flow?

Easy step by step guide one how to troubleshoot and repair vent low air flow, this article pertains to most vehicles. Step 1 – Most air control vents are equipped with a flow control door that is located at the vent outlet. This door is controlled by a thumb wheel that when activated will open and close the vent air flow door.

What’s the temp outside in a Chevy Duramax?

Right now, the temps outside are barely reaching 70 degrees and after a 30 minute drive, the transmission temps SLOWLY creep up to 200-210 degrees. The drive is back roads and some traffic. On the highway it gets to about 190 from what I’ve seen.

When to reset the computer in a 2005 GMC?

If a warning or service light illuminates on the instrument panel in your ’05 GMC, have the vehicle looked at and serviced by a qualified mechanic. After the vehicle has been repaired, you or your mechanic must reset the computer so that the light (s) on the instrument panel will shut off.

Why is my GMC Sierra 2500 not working?

’06 Chevrolet Silverado 2500 Duramax: Vents won’t switch properly at all. Sometimes if I switch them, pull over and shut my truck off and turn it back on then it will sometimes switch to that vent. But only works on defrost and bi-level vents. Floor or any mixed doesn’t work and will switch to one or the other that works.

Why does my GMC Sierra not blow hot air?

Air won’t blow out of the dash vents but the other modes work fine. Also occasionally blows hot air in A/C mode. Turning off the ignition and restarting corrects the heat issue. Driver’s side heater/a-c works okay… passenger side only blows hot air, regardless of heat setting.

Why does my Duramax water pump keep overheating?

This seems to be inherent of the factory water pump design. Overheating. Overheating issues with the Duramax diesel seems to be a hit-or-miss problem; some owners experience it, while others never will. Regardless, it’s more common with the Duramax than other engines.

Can you do an oil change on a Duramax?

A Duramax oil change is the most important piece of maintenance to keep your truck running reliably. Using a easily accessible oil filter and oil pan drain plug, anybody can do the job. This guide is specific to the L5P 6.6L Duramax found in 2017, 2018, 2019, 2020, and 2021 Chevrolet Silverado / GMC Sierra 2500 / 3500 model years.

What kind of sound does a Duramax diesel make?

Some 2020-2021 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax diesel engine (RPO L5P) may have a thumping or knocking sound coming from the rear of the engine. The sound is often more pronounced in the interior of the truck as it’s amplified by the transmission bell housing.

Some 2020-2021 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax diesel engine (RPO L5P) may have a thumping or knocking sound coming from the rear of the engine. The sound is often more pronounced in the interior of the truck as it’s amplified by the transmission bell housing.

A Duramax oil change is the most important piece of maintenance to keep your truck running reliably. Using a easily accessible oil filter and oil pan drain plug, anybody can do the job. This guide is specific to the L5P 6.6L Duramax found in 2017, 2018, 2019, 2020, and 2021 Chevrolet Silverado / GMC Sierra 2500 / 3500 model years.

Just like the LBZ was the best pre-emissions 6.6 Duramax engine, the L5P is the best post-emissions Duramax. All the problems associated with emissions system and injection pump have been taken care of, and for 2017 GM switched suppliers of the injection pump from Bosch to Denso.

In stock form and even when substantially modified, GM’s legendary V8 diesel can provide hundreds of thousands of miles of trouble-free use. Still, and just as we exposed the shortcomings of the almighty Cummins, the Duramax isn’t without its flaws—some of them catastrophic.

What was the code name for the Duramax in 2011?

In an effort to keep up with the ever-tightening emission regulations, GM redesigned its Duramax for the 2011 model year, and this time the code name was LML.

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Ruth Doyle