Are there any problems with the LB7 Duramax?

The most notorious LB7 Duramax problem is their original injectors. Even GM acknowledged their problems when they corrected the original injector design and issued a 200,000 or 7-year warranty on the updated model. That doesn’t mean the LB7 Duramax you own has this problem corrected though.

What to do if you have bad Duramax injectors?

Here are common issues experienced when you have bad injectors. Fuel in Oil. Check Dipstick look for a surplus of oil or even smell the dipstick. When fuel is present, you can often smell it. Unfortunately, there is no good way to fix the factory LB7 Duramax injectors other than replacement.

What are the problems with a Duramax diesel engine?

Both of these issues result in fuel leaking from the injector which can then enter the crankcase. This can lead to more serious problems, as diesel fuel doesn’t offer the same lubrication properties as oil. You’ll also experience loss of power, excessive smoke, rough idling, and engine misfiring.

Is the LBZ Duramax water pump prone to leaking?

Unlike the LBZ Duramax, the LB7 Duramax water pump is prone to leaking, not outright failure. The OEM water pump uses an iron impeller which makes it much more durable than the plastic impeller used on newer models. Instead, over time the seals can deteriorate resulting in lower coolant levels because of coolant loss.

Where can I buy a 2004 Chevy Silverado?

OC AUTOS The Diesel Boss! THE FIRST and only INDEPENDENT DEALER TO LAB TEST ALL OF THEIR VEHICLES! Visit Our Website: www.ocautos.net Reach Us At: (714) 265-2600 2004 Chevrolet SILVERADO 2500HD 6.6L DURAMAX DIESEL 4X4 CREW CAB SB

What is the first year of the Duramax?

The LB7 Duramax was first introduced for the 2001 model year as General Motors retired its 6.5L Detroit diesel. In every possible way, the Duramax was superior to the outdated Detroit and marked a revolutionary turning point for GMC and Chevrolet pickups in the diesel marketplace.

When did the GMC Duramax LB7 come out?

Duramax LB7 Specs & Info. The LB7 Duramax was first introduced for the 2001 model year as General Motors retired its 6.5L Detroit diesel. In every possible way, the Duramax was superior to the outdated Detroit and marked a revolutionary turning point for GMC and Chevrolet pickups in the diesel marketplace.

What kind of engine does a 2004 Chevy Silverado have?

2004 Chevrolet Silverado 2500HD LT CREW 6.6L DURAMAX TURBO DIESEL 4X4 LOADED UP! * 6.6 LITER 8 Cylinder engine * * GREAT DEAL AT $20,988 ** ONLY ONE PREVIOUS OWNER * * 2004 ** Chevrolet * * Silverado 2500HD * * LT * People everywhere will love the way this 2004 Chevrolet Silverado 2500HD LT drives with features

It is extremely important to have the heads surfaced flat before putting the truck back together. Water Pumps – Another issue with the LB7 Duramax is the water pump leaking. This one is fairly common and unfortunately a huge pain in the butt to change. Water will seep from the underside of the pump.

Are there any issues with the Duramax pickup?

This can produce long cranks and hard starts. Glow Plug System Issues – Nearly half of the check engine lights that come in for the Duramax pickups are for glow plugs. The glow plugs burn out over time and can be a real nuisance to remove from the aluminum heads sometimes.

Are there any issues with the Duramax primer button?

Under the primer button there are some orings that fail on a regular basis. This can produce long cranks and hard starts. Glow Plug System Issues – Nearly half of the check engine lights that come in for the Duramax pickups are for glow plugs.

What happens to the head gasket on a Duramax?

Head Gaskets – As these truck reach the 100,000-150,000 miles we are seeing more and more head gasket issues. The Duramax has a multi-layer steel head gasket. When they have issues, they do not typically smoke out the exhaust or get coolant into the cylinders. What happens is the head lifts a little during the compression stroke.

When did the GMC Duramax Diesel come out?

In 2001 GM introduced the 6.6L LB7 Duramax to the diesel industry, sending a b message to Ford and Dodge that they were now a contender in the light duty diesel truck market. With an available Allison read more

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.

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 kind of automatic does a Duramax LB7 have?

With an available Allison 5-speed automatic to back it up, the LB7 has proven not only to be reliable but also capable of tremendous horsepower and torque gains. At Diesel Power Products we can help you achieve your goal for your truck no matter what that might be. Search the categories below for all of your LB7 Duramax Diesel Performance needs.

What kind of problems does a Duramax engine have?

The 5 Most Common LB7 Duramax Engine Problems 1 Fuel Injector Failure 2 Water Pump Failure 3 Fuel Filter Housing O-ring Leaks 4 Blown Head Gasket 5 Overheating (fan clutch problems, radiator gunk)

What causes a head gasket to fail on a LB7?

Head gaskets are common failure points on the LB7 for a variety of reasons. As we’ll get into with the next problem, these engines are known to occasionally overheat while towing. The excess heat is thought to cause this problem some of the time. Additionally, higher horsepower LB7’s are more prone to this issue as well.

Are there any issues with the LB7 injectors?

The original injectors that came in these trucks had all sorts of issues with cracking. The symptoms are constant smoke at idle and gaining fuel in the oil. Unfortunately the best thing to do if you have this problem is to replace the whole set at once.