Tearing Down GM Duramax: What Can Harm Oil Burners?

Chevrolet Colorado and GMC Canyon: Diesel Engines

The trusty yet potentially fragile 2.8-liter Duramax LWN diesel, which had been offered in the Chevrolet Colorado and GMC Canyon until 2022, was the focus of a teardown project undertaken by Eric from I Do Cars, as he sought to discover what could have brought about its downfall.

Sad to say, not very many facts could be found out concerning this four-cylinder oil powered machine, including the amount of kilometres it had run – aside from a dated code that dates back to 2016.

Eric cranked the handle harder, only to find that something appeared to be off – likely a problem associated with his crankshaft assembly. Examining the oil filter yielded unpleasant results; small metal shavings could clearly still be seen, which is never desirable when dealing with engine components.

DEFECTIVE Parts = Engine Failure 16-22 Colorado / Canyon 2.8L Duramax

The fuel lines and rails were removed to achieve access to the intake manifold. The ports seemed ok, yet they were congested with soot – a common phenomenon among diesel-powered engines. The components below the valve cover presented the same scenario.

Eric had to take off the camshafts by disconnecting the cam gears associated with the timing belt. Upon examination, the cams seemed in good shape, apart from some slight abrasion and deterioration on the lobes.

Eric proceeded to detach the cylinder head from the motor block, during which he noted some slight harm surrounding the valves. Yet, cylinders 3 and 4 were cracked.

The engine was subsequently set up on the mount for taking away the oil pan. The components at the bottom appeared to be in good condition, including the balance shaft cassette, seals, bearings, and crankshaft. Though, cylinder four had some substantial harm to its walls.

After dismantling the engine, Eric came to the conclusion that malfunctioning injectors might have triggered disasters, like detonation that fractured the pistons. Several elements might have caused damage to the injectors, among them being fuel contaminants. As we are uncertain of the past, there was no way to guarantee that this specific engine was affected in this manner.

New Colorado and Canyon buyers won’t have to fret about diesel engines anymore. And they won’t feel the loss of its powerful torque either, since GMC claims that the new turbo 2.7-liter inline-four gasoline engine for the 2023 model year is “so good” that a diesel option is no longer necessary.


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