It’s incredible reliability for a start, matched by its massive performance potential and ability to power across the most rugged of terrains. The engine originally put out 160 HP but it was its unsurpassed 400 ft-lb of torque that put the 5.9 L in a category all its own.
Is the 5.9 Cummins reliable?
Outside of the fuel system, the 5.9 24v is a very reliable engine. The engine internals such as the pistons, rod, and crankshaft will last a lifetime and can hold up beyond 500,000 miles.
What are the problems with the 5.9 Cummins?
5.9L Cummins Fuel Pump, Injection Pump, & Injector Failures
One reason that the earlier pumps are more susceptible to premature failure is they absorb a tremendous amount of heat from the engine block. Another issue with the pump location is that the fuel pump must draw fuel a significant distance from the fuel tank.
How many miles will a Cummins 5.9 last?
The Cummins engine is design for initial overhaul between 400,000 and 500,000 miles.
Is a 5.9 or 6.7 Cummins better?
6.7L Pros & Cons
Larger displacement and longer stroke than the 5.9L means more low-end torque and better ability to spool a larger turbo. 350hp to 385hp stock (depending on model year and transmission) 650 lb-ft to 900 lb-ft of torque stock (depending on model year and transmission)
What is the best year Dodge Cummins to buy?
- 1989-1993 Dodge Ram 2500 and 3500 – Timeless Diesel. …
- 2003-2008 Dodge Ram 2500 and 3500 Heavy Duty – Best Used Diesel Value. …
- 2010-2013 Ram 2500 Heavy Duty – Most Capable Diesel. …
- 1999-2003 Super Duty – Best Budget Diesel. …
- 2008-2010 Super Duty – Best Diesel to Modify.
Is it bad to idle a 5.9 Cummins?
Idling for longer than 15 minutes should be avoided. Do not operate at full speed or load until the coolant reaches normal operating range. Do not operate above low idle until oil pressure is indicated.
What’s wrong with 12v Cummins?
Despite the brutal reliability of the 5.9 Cummins 12v, it does have one fatal flaw. The 12v has a dowel pin that sits on the front of the engine. The pin is responsible for ensuring proper alignment of the timing cover, and is made of steel.
How much power can a stock 5.9 Cummins handle?
The 5.9L inline-six mill’s factory rotating assembly from ’89 to ’02 is capable of handling 800 hp (1,400 to 1,600 lb-ft of torque) without breaking a sweat, and is often pushed into four-digit territory before aftermarket rods become a consideration.
Is 12 valve or 24 valve Cummins better?
The 12 Valve engine is hands down more reliable than the 24 Valve. Even guys who have spent the money to get an aftermarket lift pump (a must with a 24 Valve, along with a fuel pressure gauge) have gone through multiple pumps.
What is high mileage for a Cummins?
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.
How many miles is too many for a Cummins?
Dodge states that the Cummins is good for 350,000 miles before major overhaul. Chevy and Ford say 250,000 miles for their diesels.
Whats better Duramax or Cummins?
More horsepower means faster acceleration whether you’re towing or not. The current Duramax 6.6L L5P diesel wins this category with 445 horsepower. The current 6.7L 24V Ram Cummins diesel engines produce 400 horsepower. Historically, horsepower has swayed slightly in favor of the Duramax versus the Cummins line.
Which Cummins Engine is the best?
The Cummins 5.0L V8 TurboDiesel is the best Cummins engine for smaller trucks and drivers who don’t need as much pulling power. It utilizes a compacted graphite iron block for a durable construction that is still light enough for smaller applications.
What are the problems with the 6.7 Cummins?
A few issues that may occur with the 6.7 Cummins turbo include:
- Leaking oil seals.
- Worn bearings (too much shaft play)
- Sticking VGT parts.
- Compressor or turbine wheel damage.
How many miles is a 6.7 Cummins good for?
Ram claims the Cummins 6.7 engine to be good for 350,000 miles. The mileage is guaranteed if the scheduled services has been carried out timeously and no performance modifications have been done to the engine.