Engine/Transmission (1998.5 - 2002) Injector nozzles or new injectors???

[RJPotts]

I know the benefits of new injectors, so there are no questions there, I know how they work and why they work the way they do.

There are injector nozzles on e-bay that replace the nozzles on the factory injectors... they claim to have a BETTER spray pattern, getting more, if not all of the fuel, in the combustion bowl (mexican hat) as compared to the stock injectors which get xx% inside and xx% outside the bowl, and the same basic comparisons for EDMs and extrude honed injectors.

Anyone have these nozzles and are they really that much better than the other aftermarket injectors?

Thanks,

R. J.

 

[monkfarm]

I don't really know the true answer to your question, but I had my neighbor (who works on farm tractor diesels) replace the injectors when I replaced them (Incidently he pointed out that snap-on has those injector tools to replace them far cheaper than the price I paid for them at Cummins) that the nozzles are easy to replace, and the injectors are a breeze to clean up.

 

[EBung]

I do have a set of said injectors,stage 5s,and when my diesel guy set them up,and he has pop tested many a set,he was very impressed with them. A stock injector sprays sorta like a weed sprayer or garden sprinkler type pattern and the new nozzle put off a perfectly cone shaped fog. These nozzles run like a comp on level 5 all the time so if you tow heavy over hills with a turbo like mine or smaller dont get the stage 5s. Stick with 1-3. Hope this helps. E

 

[RJPotts]

Excellent,

That helps a lot. I don't tow very often, and now that I got all of my friends addicted to Cummins I won't have to tow their stuff anymore either. I planned on the stage 5's and some twins once all the necessary steps have been taken.

Did you ever have other aftermarket injectors to compare these nozzles to, or are these it for you?

Thanks,

R. J.

 

[nps]

DON"T GO TO EBAY.



You can buy nozzles or injectors from several TDR vendors CHEAPER than what the Ebay sellers are charging. Two such vendors are Diesel Dynamics and City Diesel (I have no affiliation with either).



The only difference between injectors and nozzles is that the injector shell is reused for the new nozzles, versus being able to just pop the old injector out and pop in the new one. So changing nozzles takes more time, and also produces a need to run the injectors down to your local shop for pop testing before you reinstall them (hence need a second vehicle and an open shop that is ready to test your injectors).



When you buy injectors instead of nozzles you are paying for the install, setup and test of the nozzles in the injector shell. From a reputable seller, they should also be matched such that all are flowing the same as each other in the set.



So unless you can get the nozzles pop tested for free it is kinda like "pay me now or pay me later". And when they are pop tested, if one is unbalanced and cannot be adjusted, you are stuck with it or you wait more time to get it replaced.

 

[RJPotts]

I figured that, I have the ability to put the nozzles on and pop test them myself, I work for Caterpillar so any necessary equipment or tools are available. I know how everything works, and the difference in nozzles and replacing the entire injector.

I just wondered which is better once they're in, nozzles, EDMs, or extrude honed.

-R. J.

 

[nps]

I figured that, I have the ability to put the nozzles on and pop test them myself, I work for Caterpillar so any necessary equipment or tools are available. I know how everything works, and the difference in nozzles and replacing the entire injector.

I just wondered which is better once they're in, nozzles, EDMs, or extrude honed.

-R. J.

OK. Guess I'm confused as to your last statement though. EDM (Electro Magnetic Discharge) and Extrude Honed are two manufacturing methods for putting the spray holes into the nozzles. The consensus is that EDMs are better because of better control of the machining process. This includes the Jammers on Ebay, those sold by DD and CD, and Don M's Mach series.

 

[KLockliear]

OK. Guess I'm confused as to your last statement though. EDM (Electro Magnetic Discharge) and Extrude Honed are two manufacturing methods for putting the spray holes into the nozzles. The consensus is that EDMs are better because of better control of the machining process. This includes the Jammers on Ebay, those sold by DD and CD, and Don M's Mach series.

To be technically correct, EDM is the process used to put holes in a blank nozzle, to add holes to a nozzle, or to enlarge existing holes in a nozzle. Extrude honing only works existing holes, and is more of a fine tuning procedure rather than one used to make the holes markedly larger (like EDM can).



The Jammers are EDM'ed from a blank new nozzle.