I have been driving a long time so I guess you can call me stupid, but I am asking this question anyway. I drove a "98" cummins n14 the other day and could not see where to add oil. I guess it had an overhead cam because I removed the plug dead center in the top of the engine and shone my flashlight in and saw mechanical parts. Rockers and lobes with oil on them so this is where I put the oil. The engine did not blow so I guess I was right---was I ?

 

only stupide question is one not asked.....ive been driving almost 7 years and learn something new everyday

 

On some engines you do have to add the oil in the top of the vavle cover. I'm pretty sure on most N14's you add the oil on top of vavle cover.
Just like where you said.

 

It is not stupid. It is just not marked "Add oil here" like they should be. It is not stupd to ask but add it to the wrong place and everybody will call you an idiot.

 

Yup - it's on the top front center. A black oil cap, that stands about 1 inch above the cover.

Very annoying, and darn near impossible to fill without spilling oil all over the engine.

 

Thanks fellows, I am now totally relieved.

 

That's why it's called "cummins"! :P :lol:

 

OR,come apart. :P

 

SOME n14's have the oil fill cap in the front valve cover. Lots of them have a fill pipe with an expanding rubber plug like a normal engine. It just depends on what the truck manufacturer wanted to do. They don't have an overhead cam, though. It's down in the block, on the driver's side. I'd like to see an engine with three heads and an overhead cam. That would be a real feat of engineering. I'd hate to work on it, though. N14's are bad enough as they are.

 

I have done a good job of driving safely the last 18 years, but deisel engines thats another thing. I did not believe it was an overhead cam, but really did not know, so again; I say thanks for the input.