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.
When did the first Duramax V8 engine come out?
Duramax Engine LB7 2001 to 2004 The first Duramax V8 was introduced in 2001 and was given the code name LB7. 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 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.
Can a 6.6L Duramax diesel engine be changed?
If this occurs, change the fuel brand. It may require at least one full tank of the proper fuel to turn the light off. SeeFuel for Diesel Engines030. If the light remains on, see your dealer. Chevrolet/GMC 6.6L Duramax Diesel Engine Supplement (GMNA-Localizing- U.S./Canada-13337828) – 2020 – CRC – 4…
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.
What happens when a Duramax engine goes down?
Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet. The failure is most common in higher horsepower engines, but can still occur in moderately modified and even stock power plants.
How does the water sensor work on a Duramax?
Click to expand… The WIF sensor works like this— there is a plastic float with a magnet that can move up and down on the stem. When there is water in the filter, the float is suppose to rise on the stem, and the magnet is suppose to close the reed switch– [which is mounted inside the WIF stem].
What kind of engine does a GM Duramax have?
It’s been said before, but that doesn’t make it any less true: The 6.6L Duramax is one heck of an engine. In stock form and even when substantially modified, GM’s legendary V8 diesel can provide hundreds of thousands of miles of trouble-free use.
Where is the CP3 injection pump in a Duramax?
The CP3 injection pump sits in the valley of the engine between the cylinder heads and is driven by the camshaft gear, and it has two main jobs: get fuel from the tank up to the engine, and pressurize the fuel to 26,000psi and ultimately inject it into the engine.
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.
Why is my oil pressure pump not working?
We determined that the oil pressure relief valve in the pump was defective, so we removed the front cover and replaced the relief valve. Oil pressure then appeared normal. But after the engine warmed up, the oil pressure dropped below normal at idle and the engine noise (probably lifters) returned.
What happens when the Vortec oil pump produces too much pressure?
The photo above shows a Vortec oil pump with the pressure relief valve and spring removed and placed to the side. When the oil pump produces too much pressure, the relief valve opens and vents some of the pressurized oil back to the suction side of the pump.
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.
Can a stuck relief valve cause low oil pressure?
If the valve remains open, it will dump oil pressure all of the time, including at idle when pressure is normally at its lowest. So a stuck relief valve could cause the symptoms you’ve described (low oil pressure, noise). But you’ve already removed and replaced it.
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 happens when the fuel pump goes out on a GMC Sierra?
There are physical signs that you can feel when your Sierra’s fuel pump is going out. Before taking anything apart, check to see if your engine’s computer has any trouble codes saved in it. The engine may throw a P0087 trouble code. This trouble code detects that the fuel rail/system pressure is too low.
What is the GM diesel truck fuel pump defect?
Consumers who own vehicles installed with a Bosch CP4 fuel injection pump may be affected by a GM diesel truck fuel pump defect. What is the GM Diesel Truck Fuel Pump Defect?
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.
Are there any issues with the Duramax fuel pump?
The new injectors available from us and others are updated and do not have the cracking issue. Fuel Filter Housing Oring Leaks – The Duramax fuel system does not have any sort of low pressure fuel pump pushing fuel to the engine from the tank. The injection pump sucks all the fuel from the tank.
Why did my 2004 Duramax engine not start?
My 2004 Duramax started and then died like it was out of fuel. Now it won’t start. I have about 1/4 tank of fuel, tried priming it until the batteries died.
What happens if the crankshaft on a Duramax goes bad?
Perhaps the most devastating of all Duramax failures is a broken factory crankshaft. Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet.
What causes a fuel filter to leak on a Duramax?
Fuel Filter Housing Oring Leaks – The Duramax fuel system does not have any sort of low pressure fuel pump pushing fuel to the engine from the tank. The injection pump sucks all the fuel from the tank.