Cummins N14 info needed
 

I assume the oil cap. is 40L?

Also.. most only run one oil filter? and how hard is the fuel filter to change.. is it like the ISB where you bump the engine to run the lift pump to fill the bowl..

Oil capacity depends on vehicle application and oil pan depth. The M-11's I work on have a 10 gallon capacity. N-14's don't have electric lift pumps. The have mechanical fuel pumps mounted behind the air compressor. Fuel filters vary by vehicle application/manufacturer as well, but there should be a shut off valve somewhere between the tank and the filter (usually right by the filter). As long as you shut off the fuel supply before removing the old filter and prime the replacement filter, it should fire right up.

Thanks,

The engine in question has about 621,371 Miles on the odo.. Going to make the change to AMSOIL Series 3000 5w-30 + Donaldson ELF oil filter and go to 20,000mi drains..

Again, I don't know the application of your engine, but mine are in highway motorcoaches with anywhere from 500,000 to 750,000 miles on them and I run Chevron Delo 400 15w/40 with the factory Fleetgaurd LF3000 oil filter at 25,000 mile change intervals. The oil samples still come back good and I've run one out to 32,000 miles with a good sample return as well. I can't justify the expensive synthetics when I can get those results out of dino oil at less than $9/gallon.

Oil capacity on the N-14 is 10 gallons. The fuel filter is easy. Drop the old one, fill the new one with diesel and coat the seal with fresh oil, install and fire it up. It should fire off, chug a second and then run like a top. There is no need to prime on a Cummins as long as you don't run it dry.

Baldwin BD103 is also a good filter. Ours take 11 gal to fill, maybe there is more than one kind of oil pan?

I would most deffinetly not make the switch to a 5-30 oil in that engine, synthetic or not. That engine had 15/40 in it its whole life and with nearly 650k on the clock you could be asking for trouble and waisting your money. I personally have seen the N-14's go well beyond a million miles on nothing but straight 15/40 dino oil. Chevron has also made the regular Delo 400 CI 4 oil available in gallon jugs again, this is according to my oil supplier who was dropping 500 gallons of Delo 400 into my bulk storage tuesday afternoon. Donaldson makes a good filter, however I prefer a Fleetguard, and I would do 20k intervals on that engine all day long and not give it a second thought.

Good luck, Tim

I am running one and if you go to 5w oil you will probably drop the idle oil pressure on a high mileage engine too low. The fuel system is not fussy. I have a seperator and lately have gone to just changing the filter and letting what runs out go, put in the new, start it up. I have the upside down filter with the inverted plastic boul. It is a great engine, just treat it like cummins planned. I get 7.5 mpg in the summer and winter and 8 in the spring and fall.

IMO Valvoline Premium Blue is the best oil you can put in an N14, I can personally attest to about 40 of them going near or over a million miles without an oil-related failure, unless you count the drain plug being left out of one.

sure they leak and eat injectors every once in a while, but man do they take a beating.

Funny you should say that since we just sold one that had an injector die. Third injector since I got it only the last bad one ate a piston. (they don't run very well with a hole melted in the middle.)

sold it with almost 500k miles using rotella, don't waste your money on synthetics.

Mine has 879,000 on it. You will find that Rotella carrys a little more oil pressure than Delo in the N14. I have had to replace one injector and I have one that is weak, but not enough to change it yet.

the 5w because it can get well below 0 here.. and this guy hauls at night time for the most part

It gets much colder than that here, and all we run is Rotella-T. Got syn in the diffs tho, cuz we don't change it that often.