Question: How Long Do Duramax Engines Last?

Why does my Duramax smoke at idle?

A common issue with the GM 6.6L LB7 Duramax engine is white smoke at idle.

Worn and damaged injectors are often the cause however there are other causes and considerations that should be looked at prior to injector replacement..

Why do diesels knock?

Knocking is more or less unavoidable in diesel engines, where fuel is injected into highly compressed air towards the end of the compression stroke. … This sudden increase in pressure and temperature causes the distinctive diesel ‘knock’ or ‘clatter’, some of which must be allowed for in the engine design.

What year is the best Duramax engine?

2006-2007 2500 & 3500 With arguably the best plug-and-play horsepower potential (on top of 360 horsepower being offered right out of the box), the last of the (essentially*) emissions-free engines, and a stronger, six-speed Allison to back them, the LBZ Duramax has a lot going for it.

Is 100 000 miles on a diesel bad?

Diesel Rule 1: NEVER buy high mileage To be clear – avoid diesel cars with over 100,000 miles on the clock. Just avoid them. Really. They will cost you money, time and hassle.

What year Duramax gets best fuel mileage?

Seems like some wide variances in MPGs from the Duramax/Allison power plant in 4×4 Chevy/GMC crew cabs. As far as I can tell the best years for mileage are 2001-2004 or so.

What is considered high mileage for a Duramax?

What is high mileage for a Duramax diesel? It depends. The truth is, there is no single mileage that is considered to be “too high”. Some Duramax owners claim that 100,000 miles marks a heavily-used engine, while others refuse to consider anything below 350,000 miles to be high mileage.

How much horsepower can you get out of a 6.6 Duramax?

Duramax Timeline Since then, the Duramax has undergone a variety of changes, modifications, and enhancements, all necessary in the progression and evolution of the engine. Today, the Duramax makes nearly 400 horsepower and over 750 lb-ft of torque while reducing emissions considerably over previous generations.

How much horsepower does a 2020 Duramax have?

445 HorsepowerL5P Duramax Specifications Chart (2017+)Manufactured Years:2017-2020Max Engine Speed:3450 RPMMax Braking Speed:4800 RPMHorsepower:445 Horsepower At 2800 RPMTorque:910 lb/ft at 1600 RPM21 more rows•Jun 17, 2019

Should I buy a diesel truck with 100k miles?

For your budget you could get a very nice crew cab gasser. For occasional use the diesel probably does not make financial sense. Any truck with 100,000+ miles is going to start showing its age. Even if the engine is strong, other parts of the truck will have wear and tear.

What is considered high mileage for a diesel?

Heavy-Duty Diesel Vehicles An over-the-road class-8 truck will log 750,000 miles or more before it is considered “high mileage.” It’s not unusual for a truck to achieve more than 1,000,000 miles if it is serviced regularly.

Should I buy a diesel with 200k miles?

Generally speaking, diesel trucks are sold with higher mileage than the typical used vehicle. It is not uncommon to see a used diesel truck for sale with over 200,000 miles on it. Granted, diesel engines typically have better reliability than a gasoline equivalent, but high mileage remains a concern.

How cold is too cold for a diesel engine?

Myth #2: Diesel engines won’t start in the winter. ​“Modern diesel engines start in cold weather with very little effort.” The problem is that diesel jells at low temperatures. Below about 40°F, certain hydrocarbons in diesel turn gelatinous.

How many MPG does a 6.6 Duramax get?

The 33 mpg highway figure should come with an asterisk though, since that’s for two-wheel-drive pickups. Buyers who opt for four-wheel-drive models will manage figures of 29 mpg highway and 23 mpg city. Right now, that makes the 2020 Silverado the most fuel-efficient full-size diesel pickup on the market.

Whats better Duramax Powerstroke or Cummins?

While the 6.7L Cummins and the 6.7L Power Stroke share the same displacement, the 6.6L Duramax is a pretty close match. … Horsepower and torque numbers are similar between the three diesel engines, but the Cummins engine leads the pack with its torque rating breaching the four-figure threshold.

What is the most reliable diesel truck?

The 2018 Ford Super Duty can be considered one of the most reliable diesel pickups on the market. It has a 6.7 liter Power Stroke Turbodiesel V8 engine that delivers 840 horsepower with a towing capacity up to 34,000 pounds.

Are Duramax engines reliable?

Common Problems with the 6.6L Duramax Diesel. The 6.6L Duramax has been in production since 2001 and has proved, on a large scale, to be a relatively reliable and durable platform. While various versions of the engine have surfaced over the years, all generations of the Duramax are based on the same foundation.

Do diesels need to be driven hard?

Driving a diesel engine hard will produce less soot per kWh of useful work. Period. … Driving a diesel hard will also use more fuel. Use the torque which is what a diesel is about and let the DPF sort itself out as necessary, it works for most people like that.

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

How much does it cost to replace injectors on LB7? The total cost to have a mechanic replace 8 injectors on an LB7 Duramax can range from $4000 – $5000 CAD, depending on what other work is performed at the same time.