Oil slinger in timing gear cover

[AZJeepNut]

Pretty new to engines in general so please bear with me . . .

I'm prepping my L-134 to take to a local restoration and machine shop for inspection and possible rebuild work. Comparing all the parts I remove with pics/descriptions in CJ3A Parts List and Service and Repair manual to confirm they're all there and are the "right" parts. So, I've removed the timing gear cover and am a bit confused about the oil slinger. Parts diagram doesn't help much and the assembly of parts in the cover is not self evident. One description I saw said that what looked like a second pulley on the front of the cover is the oil slinger. Is that right, and if so, how does that work and how is it assembled. Could the slinger be missing? What other parts should be between the gear cover and the crankshaft gear? Thanks for any light shed on this.

[athawk11]

AZ,
Take a look at the photos below. �The oil slinger is the disc just behind the pulley nut. �The timing cover and pulley have been removed. �This engine is a GPW chain drive L-134. �Yours may look a bit different if it is the later gear drive, but I believe you slinger is similar.

I'm no engineer, so I'm not sure how it works to throw oil about.

Tim

[garage gnome]

It works just how the name says it does. As the engine is running, it slings the oil away from the crank shaft seal. The bend near the outside edge is what makes the oil do this.

[AZJeepNut]

Thanks for the pics and info guys. Looks like the confusion was caused by what is now obvious... the oil slinger was not present when I removed the gear cover. I have a vague memory of reading somewhere a question about whether the oil slinger was necessary if the original steel camshaft gear was replaced with a celoron gear. Don't know if that is true or not, but the camshaft gear in my engine is definitely the lightweight "plastic" celoron gear. �

Here's a pic that shows both gears and the spacer as they were when I removed the cover, no oil slinger in sight. Note the camshaft gear. That plastic puppy weighs less than the crankshaft gear!

[Gunslinger]

That is the config for a newer L134, the oil for this engine comes from the drain from the oil filter and from that slotted head bolt on the right side of the cam gear,1ocklock position.  That is actually a nozzle that pulls oil off of the main oil galley.  Originally that nozzle was .07 inches dia, later Willys changed that hole to.03 inches in order to improve oil pressure at the number one crank bearing.  When I rebuilt mine I welded the hole shut and re-drilled it to.02 inches in order to improve oil pressure.

[jamesr]

I also welded the .070 opening closed, but I redrilled it to .040.  With the oil pump I have, the engine holds 40 psi at idle, and goes to 50  psi at 3000 rpm.   JamesR

[Gunslinger]

I also welded the .070 opening closed, but I redrilled it to .040. �With the oil pump I have, the engine holds 40 psi at idle, and goes to 50 �psi at 3000 rpm. � JamesR

I believe the Willys spec was .30 for the revised squirter, mine is probably smaller than it would have to be as I have about 60 lbs oil pressure when cold and 50 when warm at idle.  What is critical is to make sure you don't have a .70 inch hole, that will cause bearing problems.

[AZJeepNut]

Good info about that oil nozzle. I don't know whether or not the oil pressure in this engine was low, but I'll check the dia. of the nozzle to see if it's been modified.

I did some checking on the oil slinger question and found that most online sources believe its purpose was to keep oil away from the crankshaft seal. I understand that early seals were the older type that had a separate packing material instead of the standard steel-encased rubber of newer seals. They tended to leak, according to some folks. The oil slinger has no indication in the CJ2A-CJ3A parts list that it was used only before the newer crankshaft oil seal was adopted (after engine s/n 54100) so it should be there unless it was deleted in later engines. The s/n is missing from my engine (probably ground off in a rebuild?) so I'm not sure if it is a newer replacement.

Anyway, removing the oil slinger probably would require that a small spacer be installed in its place to keep crankshaft end play in spec. There is a slotted washer in front of the crankshaft gear spacer (see the pic I included previously) on the end of the crankshaft that does not show up in the parts list, so I'm guessing that either a previous owner removed the slinger and installed the slotted washer, or this is a later engine (not originally used in CJ3As) that was built without a slinger. Does this make sense or sound familiar to anyone?