Does anyone know the Cummins P/N for the industrial version of the valve cover that has the oil fill built in?

Thanks.

 

Valve cover with oil filler consists of:

* Cummins 3928405 (replaces 3902605) valve cover;
* Cummins 3901895 cap;
* Cummins 3936876 seal

And to plug the front timing cover hole:
Eliminator, oil filler plug - Cummins 3903463

 

Don't install one unless you really need to. You'll have to add oil with a teaspoon to prevent it from overflowing the valve cover. It definitely adds some time to an oil change.

 

That's odd. I'm looking at this head behind me, and it looks like it oughta drain fairly well around the two push-rod holes.

I haven't tried to fill the engine that way either. (I put a homemade one on there). It works as intended using the OEM fill tube that's been cut short and epoxied in place. I'm just thinking about some mess http://www.genosgarage.com/prodinfo....ABM_*VC12V_BLK.

Thanks folks.

 

It might not be so bad with a quart bottle. When servicing these trucks, I usually dump in oil from a gallon jug. They won't take that amount of oil nearly as fast as the stock fill tube will.

 

That v belt pulley was found on a truck you have? They were usually for powering a hydro pump or plow on dumps. That pic looks familiar.

 

Is there any sort of advantage to having an oil fill right there, other than if its needed for relocating?

 

None that I can think of. I recently installed a (supplemental) 2nd gen 24v crankcase vent (goes in our oil-fill spot) so with that, I had to come up with somewhere else to fill with oil.

 

BC, do you have a pic of that breather?

 

What's the extra vent for?

 

The front oil filler in the timing case gets in the way of the v-belt drive whenever you use the front accessory mount which are the three holes located on the front top of the cylinder head on the passenger side of #1 valve cover. Some of the 4BT's have a vacuum pump located in this position that is driven by a v-belt from the fan pulley.

 

Anybody else know of an advantage to this, other than BC's? Just curious

 

With the increasing boost, there tends to be an increase in blow-by. With that, the crank-case pressure would rise if not for the OEM crank-case vent on the engine's side cover. But it's only good to a point. The increasing out-flow of gas tends to increase the amount of oil carried out . . . . . making a mess under the truck.

ADDING the 24v vent increases the venting of the block overall. That lessens the volume of gases flowing through any one vent, reducing the amount of oil carry over.

.... least that's what I tell myself.

Truck's a lot cleaner underneath too.



I recently saw a vent like this PLUS the industrial valve cover on Ebay