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.

Are there any problems with the Duramax engine?

The failure is most common in higher horsepower engines, but can still occur in moderately modified and even stock power plants. Not specific to one version of Duramax in particular (ex: LB7, LLY, LBZ, LMM or LML), the problem exists across all generations.

What to do if your Duramax crankshaft is weak?

The ultimate fix for the weak factory crankshaft is to replace it with a stronger unit that’s been internally balanced. The billet Callies crankshaft available through Wagler Competition Products is machined from triple heat treated 4330V steel and features reduced rod journal widths for improved strength (which calls for narrower rods).

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.

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.

What kind of connecting rod does a Duramax have?

We’ll be honest, experiencing a tweaked connecting rod in an LB7 Duramax (’01-‘04) or LLY Duramax (’04.5-’05.5) is almost exclusively reserved for engines making double the factory horsepower (or more).

What are the problems with the Duramax LB7?

One thing the ’01-’04 LB7 Duramax is notorious for is injector failure. The two primary failure points of the factory injectors are internal cracking of the injector body itself and corrosion-induced failure of the internal ball seat.

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 kind of transmission does a Duramax diesel use?

It was the first to come bolted to the six-speed Allison transmission which provides a lower cruising RPM and greater fuel efficiency when compared to the five-speed on the LB7 and LLY.

What kind of fuel does a Silverado Duramax use?

As for fuel I have always filled up at Sunoco with their Gold diesel. The previous owner did the same. I always run the tank to empty before refilling it. I get about 300-350kms to a tank.

How many Duramax filters are left in stock?

Only 8 left in stock – order soon. . Only 3 left in stock – order soon. . Only 2 left in stock – order soon. . Only 18 left in stock – order soon.

When to change transmission fluid on GM 6 speed Duramax?

GM advises that the ZF S6-650 6 speed manual transmission does not require service. To maintain shift quality and promote transmission life, consider replacing fluid at 60,000 mile intervals, especially if usage meets any of the severe duty conditions. Service interval not provided by GM, routine service may promote longevity.

How often do you change the INT filter on a 6 speed Duramax?

Replace external filter at 45,000 mile intervals and full service at 97,500 miles under normal conditions. Perform full service (new fluid, ext & int filter) every 45,000 miles under severe duty conditions. Replace manual transmission fluid. GM advises that the ZF S6-650 6 speed manual transmission does not require service.

Is the GMC Duramax Trans won’t shift?

Enter your ride HERE to be a part of this months Ride of the Month Challenge! Alright guys I’ve got an 04.5 LLY and after sitting for 2 or 3 days went to drive it and it clunks real hard into reverse and drive.

When to drain and replace differential fluid in Duramax?

Service interval not provided by GM, routine service may promote longevity. Fluid level should be checked periodically. Drain and replace differential fluid immediately if the axle is submerged in water. Service interval not provided by GM, routine service may promote longevity. Fluid level should be checked periodically.

What kind of pump does a Duramax cp4.2 use?

Like all Duramax engines from ’01-’10, the LML was also void of a lift pump from the factory. This means that not only does the CP4.2 have to pressurize fuel as high as 29,000 psi before sending it to the rails, but it also has to pull its low pressure fuel from the tank.

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.

Where can I find a damaged fuel filter?

Damaged Fuel Pump Fuel filters are a common service component found on virtually all vehicles equipped with internal combustion engines.

What causes the injector on a Duramax to leak?

Leaking Injectors—LB7 One thing the ’01-’04 LB7 Duramax is notorious for is injector failure. The two primary failure points of the factory injectors are internal cracking of the injector body itself and corrosion-induced failure of the internal ball seat.

What causes the crankshaft on a Duramax to crack?

Or how about the fact that the rods in the LB7 and LLY engines can bend with added power and the LBZ and LMM mills are notorious for cracking pistons? Discover the worst failure point (s) of your Duramax in the article that follows, along with how to address it. 1. Snapped Crankshaft

When to replace Dormans fuel injection return line?

Dormans Fuel Injection Return Line and Gasket protect against leaks that could cause fuel pressure to drop, preventing possible engine damage. These gaskets should be replaced any time the fuel injectors are serviced.

What is injector return line bolt for GM Duramax LB7?

The Merchant Automotive 10491 Injector Return Line Bolt has been specially designed for your 2001-2004 GM 6.6L Duramax LB7. This is not just a replacement bolt. Merchant Automotive has redesigned this bolt head to allow nearly double the tool engagement.

What kind of fuel rail plug does a Duramax use?

The Attitude Performance Products 2004 LB7 Fuel Rail Plug for your 2001-2004 GM 6.6L Duramax is designed to replace the stock pressure relief valve. This valve helps maintain fuel rail pressure during heavy engine load conditions, while eliminating the potential for low fuel rail pressure DTC Code P1093.

When to replace gaskets on GM Duramax LB7?

The Dorman 904-103 Fuel Rail Return Line Gaskets are a direct replacement for your 2001-2004 gM 6.6L Duramax LB7. Dormans Fuel Injection Return Line and Gasket protect against leaks that could cause fuel pressure to drop, preventing possible engine damage. These gaskets should be replaced any time the fuel injectors are serviced.

Where does the fuel leak go on a Duramax?

Fuel leaks on a duramax are almost always on the return side of the system, the smaller of the two fuel lines traveling down the frame rail, going to the fuel cooler and back to the tank. They can leak at the cloth covered rubber return lines at the injectors, these lines can only be replaced in sets left and right side, they are expensive.

Why is my Duramax diesel engine not starting?

I have seen more leaks causing no starts, loss of prime and low fuel rail pressure codes from poor fitting aftermarket fuel filters use Delco only. Remember when dealing with power loss and fuel pressure issues the duramax has no in- tank or frame mount fuel pump pushing fuel to the engine.

What kind of fuel system does a Duramax use?

The Aeromotive 11801 130GPH Fuel System offers a true solution to any 2001-2010 GM 6.6L Duramax owner looking to upgrade the fuel system on their truck.

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.

What causes fuel starvation in a Duramax Diesel?

Fuel Starvation and/or Air in the Fuel Lines. The Duramax diesel is susceptible to fuel starvation and getting air in the fuel lines. This can be contributed to the fuel filter housing design and the fact that the Duramax does not use a lift pump. Rather, the high pressure fuel pump (injection pump) is responsible for vacuuming fuel from the tank.

Should you allow diesel engine to warm up before driving off?

Coming to should you allow diesel engine to warm up before driving off, the answer is, undoubtedly yes. Should you allow diesel engine to warm up before driving off explained (Photo Source: depositphotos)

What makes the Duramax LBZ engine so reliable?

Unless you are looking to break the 600rwhp barrier, the Duramax LBZ engine is extremely reliable. The tune-only power capabilities combined with its reliability are what make the LBZ the most sought after Duramax today, nearly 14 years after it stopped production.

How big of a fuel tank do I need for a Duramax?

The Titan 7010101 39 Gallon Mid-Ship Replacement Fuel Tank for your 2001-2010 GM 6.6L Duramax provides you with additional fuel capacity for peace of mind whether driving down the highway or through remote rural areas.

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 Duramax fuel filters left in stock?

Only 15 left in stock – order soon. . Only 2 left in stock – order soon. . Only 7 left in stock – order soon. . Only 3 left in stock – order soon. . Only 1 left in stock – order soon. . . Only 1 left in stock – order soon.

Are there any flaws in the Cummins Duramax?

Still, and just as we exposed the shortcomings of the almighty Cummins, the Duramax isn’t without its flaws—some of them catastrophic. For example, did you know the injection pump on the LML version is prone to coming apart and wrecking the entire high-pressure fuel system when it does?

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 many stars does Duramax fuel line get?

OUR FEEDBACK SPEAKS FOR ITSELF! 5.0 out of 5 stars. 5.0 out of 5 stars. 5.0 out of 5 stars.

How do you replace a fuel line on a Chevy Duramax?

If so you need a quick disconnect tool to remove the line and your not going to like the price of the replacement from GM. another alternative is after you remove the line is to carefully cut the crimp fitting enough to remove the rubber line from the steel and the just replace the rubber part using hose clamps.

When do I need to replace the fuel lines?

As far as I can see the fuel lines have to be replaced as a unit from the tank to the engine. The parts I need to replace are #5 and #19 on this dealer website. Iwould’ve posted a picture but I can’t figure out how on this forum.

Why are my fuel lines leaking on my Duramax?

I have an 07.5 LMM and my fuel lines are leaking where the rubber hoses are crimped to the hard lines. I was wondering if anyone has replaced these and how difficult they are to change. Anything special that i need to do or any suggestions are much appreciated. Do they make a aftermarket fuel lines that are better than the stock ones.

Can a rubber fuel line fail aftermarket?

Any of the hoses that are rubber with metal crimped ends will eventually fail. Most switch to aftermarket, but I have no knowledge of those as I haven’t done it. Welcome to the forum. Look around and you’ll learn a lot. Do you mean the one over the fuel tank?

How can I Keep my Duramax Diesel pump healthy?