How do you all get 6.2s to 300K miles

[nycxjeremyy]

Looks like maybe a glowplug not working or an injector is sticky or some air in the fuel system.

Shoot, how can I diagnose these from least bad to worse

Trying to keep this motor going for a while, just a lowly E3

 

[dbrannon79]

Start with the glow plugs. when was the last time you replaced them? what GP's did you use then? the best are the AC Delco 60g's they are self regulating so they won't swell up and break off destroying the engine.

think if the GP's and injectors like spark plugs on a gasser. they need to be replaced at least every 100k. injectors can be rebuilt, but it's getting harder and harder to find legit genuine quality Bosch injectors.

 

[nycxjeremyy]

Start with the glow plugs. when was the last time you replaced them? what GP's did you use then? the best are the AC Delco 60g's they are self regulating so they won't swell up and break off destroying the engine.

think if the GP's and injectors like spark plugs on a gasser. they need to be replaced at least every 100k. injectors can be rebuilt, but it's getting harder and harder to find legit genuine quality Bosch injectors.

well sir as you can see, the previous owner did the glow plugs back in 2023, says the relay and glow plugs themselves were done.

 

[dbrannon79]

are you still running the factory glow plug harness? inspect the connectors at each GP making sure they are securely attached and not loose. make sure the wires are not up against the manifold or exhaust pipe.

 

[dbrannon79]

looking at your video, I think you have one or maybe two cylinders that isn't warming up as well on the GP's could be a loose connection or a GP is failing. it doesn't hurt to pull the, mark which cylinder each are from, and bench test them with a set of jumper cables. count in seconds the time each one takes to glow red hot. also inspect the tips for erosion. the amount of erosion and color of the GP tips can tell a person how the engine is doing. same for reading a spark plug on a gasser.

 

[ak diesel driver]

Your receipt says only 6 glowplugs . Most likely the hardest to get to weren't done. If you have an infrared heat gun you could shoot the exhaust manifold right where it comes out of the head when you start it and see which cylinder/s aren't warming up as fast. It would be a 2 man job and probably take several cold starts to narrow it down.

 

[WarWagon]

Cold engine use the IR gun aimed very near the glow plug. Write down the temps. Cycle the glow plugs, but, DO NOT START the engine. Quickly check the same areas again. Any that haven't heated up some are likely trouble spots for the glow plugs.

Start on the turbo side as these are the hard ones... to even see.