How long do duramax engines last

Failure of this CP4 pump is usually catastrophic, causing instant contamination of the entire fuel system with metal particulates.

Perhaps the most devastating of all Duramax failures is a broken factory crankshaft. The crankshaft usually breaks near the number one rod journal due to a combination of excessive rpm and the large external counterweight.

In stock form it can support RWHP with the help of a lift pump. For HP you simply need more pump. LMM emission controls have proved to be as reliable as any. Not only do the 6. Like the Duramax, Cummins diesel engines can be expected to last a long time. Between , and , miles is usually considered high mileage on a Cummins diesel.

Of course, it again depends on how well-maintained the engine is. The Powerstroke engine is found in Ford trucks and, like the Duramax and Cummins engines, can often last up to , miles. However, as with the Duramax and Cummins engines, between , and , miles is usually considered high mileage for a Powerstroke engine. Maintenance of the truck and the engine is the key to getting the most miles.

Buying a diesel pickup truck with , miles or more might be a great deal. Brand new diesel pickups tend to have higher price tags than their gas brethren, so buying used often makes a lot of financial sense. Consider the following when buying a used diesel pickup:. Small leaks around gaskets and seals are not uncommon. On the other hand, oil more heavily coating the area around a seal or gasket might raise a bit more suspicion.

It depends on how much oil is covering that area. Long-term operation of one of these older diesel engines without additional lubrication can cause early injection pump failure. But a fuel additive can help modern diesel engines as well. As with any vehicle, different trucks and different engines have different problems. This is where maintenance records can be invaluable.

For example, it might be relatively common for the water pump in a certain truck to fail every , miles or so. Synthetic oil offers the following benefits:. The biggest enemies to oil stability are heat, repetitive mechanical forces and chemical breakdown from fuel dilution. Depending on how many times the vehicle has visited a or any GM dealership for service, the printout may be one or more pages in length. No one is suggesting that this truck didn't get more service than what is indicated here, but we believe that this truck is still running the original engine and transmission - and mostly everything else.

I suppose we can excuse having to replace the water pump at the , mile point. I didn't test drive this truck, but it started quickly with little to no smoke after an overnight low into the 20's, and the engine idled very well, though perhaps not quite as smoothly as an engine with fewer miles might.

The upper portion of the cylinder walls are induction hardened at the DMAX factory. Heat treating the cast-iron cylinders increases wear resistance and prolongs the life of the engine. To make the point of the effectiveness of heat-treating the cylinder walls, the AERA-Engine Builders Association issued a technical service bulletin some time ago that warns engine shops about the potential for chattering as the carbide teeth of the boring tool pass over the hardened portion of the Duramax cylinder walls.

With careful and routine service - and a mindful driver, I'd expect many more miles than is indicated by GM's conservative rating. Perhaps at least K-miles? The plastic mudflap extensions show they spent a lot of time being bowed by the wind in hot weather. The lack of rock damage indicates the miles were all accumulated while on the highway. After having traveled this many miles, a slightly tatty driver's seat is actually a badge of honor.