Can injectors last the life of a diesel engine?

[The motor guy]

I'm at 241,000 miles and 12,000hrs on my 6.7 cummins. Original cp3 injection pump and fuel injectors. Still runs good, but I'm curious as to how long I can expect out if them?

 

[oldcodger]

Can't speak for a pickup truck but I have seen many farm tractors with injectors and pumps which have lasted through two motor overhauls and were running great.

 

[Jimmy_Russells]

With the 6.7L I have seen highway trucks as high as about 400,000 miles, and I've seen them dead at 100k in a city truck.

The 6.7 is pretty sensitive to injector return bypass, typically your first sign they are starting to fail is hot re-start long crank issues, sometimes accompanied by low rail pressure codes.

 

[The motor guy]

With the 6.7L I have seen highway trucks as high as about 400,000 miles, and I've seen them dead at 100k in a city truck.

The 6.7 is pretty sensitive to injector return bypass, typically your first sign they are starting to fail is hot re-start long crank issues, sometimes accompanied by low rail pressure codes.

Mine is mostly city driving. I usually go by hours and not miles for maintenance. By the time I get 6 or 7,000 miles I'll be around 4-500hrs on the oil change., which is too long imo.

 

[Bjornviken]

JCB 419 wheel loader with same engine recommend to change injectors at 10k hrs. My personal opinion on that... waste of money

 

[The motor guy]

JCB 419 wheel loader with same engine recommend to change injectors at 10k hrs. My personal opinion on that... waste of money

Well, you have to stop driving it when you see it start blowing smoke or getttinga bad misfire. Most people keep going, then you need a whole engine rebuild

 

[Bjornviken]

Well, you have to stop driving it when you see it start blowing smoke or getttinga bad misfire. Most people keep going, then you need a whole engine rebuild

yes, that's correct. Engine bearly smokes. Also the 10k hrs service is over 11k €

 

[The motor guy]

yes, that's correct. Engine bearly smokes. Also the 10k hrs service is over 11k €

Then again the dpf hides any smoke the engine would produce, so that theory goes out the window

 

[mattd]

Lots of variables that effect injector life. A lot depends on maintenance and fuel quality

 

[Bjornviken]

Then again the dpf hides any smoke the engine would produce, so that theory goes out the window

What dpf?

 

[Donald]

I will bet fuel quality and a good lubricity additive along with proper fuel filter maintenance with OEM or quality filters.

I am no expert on injector design but I am guessing the injectors in my PSD 6.7 have smaller holes for the fuel to spray out of that the ones on my older Kubota diesel tractor with a mechanical fuel pump.

 

[The motor guy]

I will bet fuel quality and a good lubricity additive along with proper fuel filter maintenance with OEM or quality filters.

I am no expert on injector design but I am guessing the injectors in my PSD 6.7 have smaller holes for the fuel to spray out of that the ones on my older Kubota diesel tractor with a mechanical fuel pump.

Yes. Your 6.7 powerstroke is common rail and spits the fuel out at like 33,000psi at full throttle. I used stanadyne lubricity formula for years, but started questioning if it was still good because they haven't done an updated study since 2007. Most diesel fuel has bio diesel in now, or claims it does, so I don't bother with lubricity additives now

 

[Rmay635703]

Never touched them 82 6.2 diesel suburban 438,000 miles

 

[mattd]

Yes. Your 6.7 powerstroke is common rail and spits the fuel out at like 33,000psi at full throttle. I used stanadyne lubricity formula for years, but started questioning if it was still good because they haven't done an updated study since 2007. Most diesel fuel has bio diesel in now, or claims it does, so I don't bother with lubricity additives now

I would use hot shot EDT or opti lube.