N14 Cam Replacement

I don't have an N14 I have a Big Cam but I would imagine they are about the same.

I don't think you really need any special tools to pull the camshaft out but you have to take everything off of the front and be able to remove the front cover... Except if you have to remove the accessory drive gear or if you are going to change the cam bearings.

You also have to be able to back off on the valves and remove the push rods.

Normally you remove the cam followers but if you have coat hangers or strong wire, you may be able to tie the cam followers up away from the camshaft.

I don't recall whether the camshaft will come out with the accessory drive gear on or not. It may come out right past that gear without taking it off. I seem to recall that Camshaft gear is pretty big I would think you can leave the accessory drive as it is.

If you can't get it past the accessory drive gear then you need a puller to get it off and you need a special tool to put it back on. You will need a new rubber seal that fits in the slot and you will need a new nut. Whatever you do, do not try to put the accessory drive gear on with the nut, you need the special tool. And a torque wrench. I think the accessory drive nut is somewhere around 300 pounds, I'd have to check my manual.

If you can hold the cam followers up I don't think you have to actually remove the accessory drive itself.

Also if you don't disturb the cam followers by not removing them, your timing will remain the same and you will not have to retime it.

If you are going to replace the camshaft bearings there is a special tool they sell to remove them but you'd have to have the cam followers out to do that.

Then you would need the tool to time the engine or someone to time it for you.

I'm not sure what tool you need to set the STC injectors because my injectors are different.

If you need to remove the whole accessory drive the bolts on the back side of it you can use either a very short wrench or a wrench that you cut down or they sell a wrench that's kind of bent like a 1/2 moon.

 

My cam went bad in June. Shop said metal flakes went everywhere oil flowed. I put a new motor and every component the oil flowed thru.
Wish you the best.

 

Go here... Cummins QuickServe Online
Create an Account (it's Free) Register your ESN.& you will have access to Parts books & Manuals applicable for your Engine..

Good Luck..

 

delete double post.

 

Why can't you pull the accessory drive?

Some C wrenches, like a Snap On M1321, are needed to get the compressor off. Pulley comes of with a regular flange type puller

Here's the pulley installer:
M20020 Cummins Accessory Drive Pulley Installer 3376085

It's probably not that Phoenix doesn't care, they just don't know. Kids in the shop don't know much about older engines. I gave up trying to find someone to rebuild my big cam and just did it myself

The hardest part for me to find in the rebuild was cam follower pivots. I'd recommend getting rebuilt cam followers if you find you need to replace those

 

Is this an STC or an electronic injector engine?

 

When we ran trucks we broke down in Phoenix one time and they stuck it to us real good at the shop we ended up at. And they took their time for something simple. Can't remember the name. Maybe Lake something. It was probably 15 years ago.

 

How does incorrect camshaft timing eat cam bearings? Did it run OK?