What are the problems with the 6.6 Duramax?

What are the problems with the 6.6 Duramax?

Newer Duramax engines come equipped with water pumps that have plastic impellers. These impellers are extremely weak and prone to failure. Water pumps on Duramax engines are also prone to leaking. These leaks can result in engine overheating issues.

What year Duramax have Injector Problems?

What year Duramax has injector problems? The LB7 Duramax built from 2001 – 2004.5 is known for injector failure. The good news is the replacement injectors you purchase from us incorporate several updates to help prevent repeat failures.

How do you know if your injectors are bad on a Duramax?

Symptoms of Failing Duramax Fuel Injectors

1. Excessive Smoke.
2. Power Loss.
3. Rough Idle.
4. Fuel in Oil.
5. High Return Fuel.
6. No Start.

How many miles per gallon does a 6.6 Duramax diesel get?

The 2021 Sierra HD series includes a diesel engine at the 2500 level that’s capable of generating 445 horsepower and 910 pound-feet of torque. This Duramax 6.6-liter V-8 gets 17 to 19 mpg on the highway.

How many miles will a Duramax 6.6 last?

Registered. The Duramax™ 6.6L V8 Turbo Diesel Engine is sold with a warranty of 100,000 miles/160,000 kilometers. The Duramax™ has been tested to survive upwards of 200,000 miles/320,000 kilometers.

Is the 6.6 Litre Duramax a good engine?

It is considered the best post-emissions Duramax engine, as previous issues with the injection pump and emissions systems have largely been fixed. The 6.6L L5P Duramax offers a quieter ride with more horsepower, torque (445 horsepower and 910 pound-feet torque) and power ratings than previous engine versions.

How long do injectors last on 6.6 Duramax?

Unfortunately, Duramax injectors are both expensive and difficult to reach in the engine compartment for replacement, which prompted GM to extend its injector warranty to 200,000 miles. The LB7 is otherwise a very reliable engine.

How much does it cost to replace injectors on a Duramax?

The total cost for Duramax injector replacement is $2,000 and $6,000. The labor costs associated with this job can range from $800-$1,500. Related repairs could be needed if you have driven for a long time with dirty fuel injectors.

How much does it cost to put new injectors in a Duramax?

How long should I let my diesel truck warm up?

As a general rule of thumb, if it is below zero degrees Fahrenheit, you should allow your engine up to seven minutes to warm up. If the temperature is between zero and fifty degrees, the warm-up period should be three to five minutes. Over fifty degrees will only require one or two minutes to warm up.

How long can a Duramax idle?

Any LB7 truck can be ran at idle with no problem. GM says the lly and up trucks with an egr cooler and valve can only be idled for 10 minutes MAX is what gm technical assistance tells us.

What year Duramax is most reliable?

The Duramax engine received significant changes in 2011 to meet the new emissions regulations. Despite it being more complicated than its predecessors, it is more reliable. The safest Duramax model years you can buy are the models produced from 2011 to 2021.

How long should you let a Duramax warm up?

You should not need to warm up these trucks longer than 10 minutes, that is just wasting fuel.

What year of Duramax is best?

LBZ: 2006 – 2007

It has the best potential for performance and horsepower additions through various Duramax parts mods and tuning. Built stronger and more durable than previous engines, the LBZ is reliable and powerful.

What are the signs of injector failure?

An abrupt loss of engine power is a somewhat obvious sign of a fuel injector failure. If the fuel injector is clogged, the fuel supply will be irregular too. When the fuel level fluctuates drastically, the high and low rpm’s will cause the engine to move in surges rather than slow and gradual movements.

What year is the most reliable Duramax?

Will a bad injector throw a code?

Diagnosing a Clogged Fuel Injector
One of the obvious symptoms of a clogged fuel injector is the lighting up of the “Check Engine” light in your dashboard. The fault codes usually associated with a clogged fuel injector can range from misfire codes to lean codes.

Can I leave my diesel truck idling all night?

Manufacturers recommend running the engine for five minutes to cool it down before shutting it off, but many drivers won’t wait. They simply leave the engine idling while they eat, shower, or shop at a truck stop. ”There is no need to leave an engine idling except in cold weather,” Mr. Allen says.

How cold is too cold for a diesel engine?

How cold is too cold for a diesel truck? The diesel fuel in your fuel tank will become like gel at a temperature of 15ºF or -9.5ºC and you will have trouble starting your engine. Anything below 15ºF / -9.5ºC can and will cause problems for your diesel vehicle.

Is it OK to leave a diesel running while fueling?

LEAVE YOUR DIESEL RUNNING WHILE FUELING?! – YouTube

How long should I let my Duramax warm up?

Which is better Cummins or Duramax?

The Duramax leads with horsepower, but the Cummins is the king of torque with numbers up to 1,000 ft-lbs depending on the truck.

What year Duramax gets the best mpg?

#1 – Chevrolet Silverado 2500HD

Why do people leave diesels running?

Truckers, both independent owner-operators and fleet drivers, leave their engines idling for three main reasons: weather conditions, economic pressures, and old habits. In cold weather, a truck’s engine and fuel tank need to stay warm.

What is the break in period for a Duramax diesel?

The vehicle does not need an elaborate break-in. But it will perform better in the long run if you follow these guidelines: . Keep the vehicle speed at 88 km/h (55 mph) or less for the first 805 km (500 mi).