What is the most unreliable diesel engine?

Some 1994-2001 Chevy & GMC 6.5L Pickup are the worst for reliability. This Detroit 6.5 liter offers slightly more power than its smaller 6.2L predecessor. It put out 180hp and 360 lb-ft of torque. Even turbocharged, this engine could not compete with its Powerstroke or Cummins rivals.
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Which diesel engine has least problems?

The 7.3L Powerstroke is still considered one of the most reliable diesel engines ever made. It also has plenty of power for most applications, with 500 pound-feet of torque and 235 horsepower. It was built for the long haul, too with an air-to-air intercooler, oil-based fueling, and durable internal hard parts.
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Who makes the most reliable diesel engine?

7.3L Ford Power Stroke (#1 Reliable Diesel Engine)

After several decades, the 7.3L Powerstroke is regarded as the most reliable diesel engine among its sophisticated counterparts. This diesel engine was a product of the joint venture between International Navistar (now Navistar International) and Ford.
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Which diesel engine lasts longest?

Cummins is the brand of engine found in the Dodge diesel and Ram diesel truck lines. Like the Duramax, Cummins diesel engines can be expected to last a long time. Between 350,000 and 500,000 miles is usually considered high mileage on a Cummins diesel.
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Which diesel is most reliable?

10 Best Diesel Engines (In the Past 20 Years)
  • #1 – 6.7L Cummins – (Best for Towing) ...
  • #2 – 6.7L Power Stroke – (Best Ford Diesel Engine) ...
  • #3 – 6.6L Duramax L5P – (Best Duramax Engine) ...
  • #4 – 7.3L Power Stroke – (Most Reliable) ...
  • #5 – 6.6L Duramax LBZ. ...
  • #6 – 3.0L EcoDiesel. ...
  • #7 – 5.9L Cummins (24V ISB) ...
  • #8 – 6.6L Duramax LB7.
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I Asked Diesel Repair Shop Owner What Is The Most Unreliable Diesel!



Is Duramax better than Cummins?

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.
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Is Powerstroke better than Cummins?

The Power Stroke has more horsepower but slightly less torque, while the Cummins has the opposite. However, as noted by AutoWise, the Power Stroke ultimately produces more horsepower, which is a better indicator of engine strength in real driving situations.
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Whats better 7.3 or 6.0 Powerstroke?

From a reliability, durability or simplicity standpoint, the 7.3L is hands down the winner. When it comes to horsepower, drivability and meeting modern day emissions standards, the 6.0L has it beat. Ultimately, both engines have their pros and cons.
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What powerstroke to avoid?

The 2003-2007 Ford Super Duty 6.0L may be the worst diesel truck of all time. The 6.0L Powerstroke is infamous. The engine is so bad that Ford and Powerstroke parent company Navistar were engaged in a serious legal battle.
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What's the most reliable engine?

So here we are to show you the most reliable engines ever made.
  1. 1 General Motors LS Engine. WallpaperSafari.
  2. 2 Mercedes-Benz OM617 Diesel Engine. via DieselMercedes. ...
  3. 3 Nissan RB26DETT Engine. ...
  4. 4 BMW M57 Diesel Engine. ...
  5. 5 Lexus 2UR-GSE Engine. ...
  6. 6 Lexus 1UZFE Engine. ...
  7. 7 Honda K Series Engine. ...
  8. 8 Honda B Series Engine. ...
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Which is better Cummins or Caterpillar?

In terms of fuel efficiency, Cummins' engines are 6% better than Caterpillar . That's not the only area where CMI's coming out on top. It's taking share from CAT in other heavy-duty engines as well. Cummins is taking share from all its competitors, actually, as it's now the largest supplier to Paccar .
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Is Cummins diesel the best?

Cummins diesel trucks, or trucks that use a Cummins engine, are widely regarded as the best in the industry, and for good reason. The company behind Cummins engines, Cummins Inc., is focused on designing strong, durable engines for industrial use.
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Is a 5.9 or 6.7 Cummins better?

To sum up, the more simplistic 5.9 fixed geometry turbo means that while it tends to be more reliable, the more advanced 6.7 variable geometry turbo gives better performance. The Exhaust Brake is a big part of why the 6.7 Cummins is such a powerful towing machine.
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How reliable is a Cummins?

The Cummins brand is extremely reliable and prides itself on long-lasting engines. The 5.9-liter engine can expect to churn out 300,000 to 400,000 miles. The 6.7-liter engine ranges in the middle of that at 350,000 with no modifications and proper services. Diesel engines are made to be powerful and give high output.
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How reliable is a turbo diesel?

Reliability is easy to achieve when your engine has been turbo charged. It is common for diesel trucks to exceed 250,000 miles before requiring a rebuild, as well as often exceeding 500,000 miles.
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Which diesel engine is easiest to work on?

There are many other aspects to diesel engine design that might make one superior to the other, but when judging each on the single aspect of ease of maintanence, the Cummins is the easiest to work on by a longshot.
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What years did Ford engines to avoid?

2003-2008 F-150s featured one of two main engine options: Ford's 4.6 L Triton, or 3-valve 5.4 L 3V Triton V8. There were a great many wonderful and reliable trucks and engines in this period, but one to avoid is the 2004 F-150, which is known for having one of the worst engines in the history of automobiles.
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Is the Ford 6.0 diesel any good?

While the 6.0L Powerstroke's problems dissuade many people from ownership, the trucks are a lot of fun to drive and they can be great trucks once the necessary repairs are performed. Our best advice is to look for a late model truck or a 6.0 that has been already bulletproofed.
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Are 6.7 Powerstrokes reliable?

Take out the emissions systems and the 6.7 Powerstroke is a very reliable engine. Even with the few common problems the 6.7L Power Stroke should be good for 250,000+ miles. Maintain your Ford 6.7L engine well and chances are it will reward you with a great overall experience.
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Do they still make 7.3 Powerstroke?

Ford's 7.3-liter truck engine is back, and this time it's a gas. This is deliberate. Ford could've designed its new big-bore gasoline truck engine to any size it wanted, but it chose to give each cylinder a 4.22-inch bore and a 3.98-inch stroke.
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Who makes the Cummins motor?

It's a common myth that Cummins is owned by auto manufacturers like Ford or Chrysler. In fact, Cummins Turbo Technologies is an independent company that manufactures and markets a complete line of diesel and natural gas-powered engines.
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Why is 7.3 Powerstroke so good?

According to TheDrivingLine.com, the 7.3 liter Powerstroke is reliable because its design is simple and only uses 6 bolts per cylinder. Another reason trucks with these engines are durable is that they feature a fixed geometry turbo and an oil cooler that is located externally.
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Which will last longer Cummins or Powerstroke?

Most diesel enthusiasts seem to agree that the Cummins Turbo Diesel is the better engine in terms of reliability, but the Ford pickups tend to last longer and be more reliable than the Ram pickups.
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Are Duramax diesels reliable?

Duramax engines are extremely reliable over time; there are plenty on the road today that still runs like new even though they're approaching or exceeding 100,000 miles!
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What is the most reliable diesel pickup truck?

Best Diesel Pickup Trucks for 2021
  • 2021 Ram 1500 EcoDiesel. ...
  • 2021 Chevrolet Silverado Duramax/2021 GMC Sierra 1500 Duramax. ...
  • 2021 Chevrolet Colorado Duramax/2021 GMC Canyon Duramax. ...
  • 2021 Jeep Gladiator EcoDiesel. ...
  • 2021 Ford F-150 Power Stroke.
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