I am trying to find the oil filter on a 1966 Mack R series truck and I know what oil filter typically look like but for some reason I just cannot find the filters on this rig. Is there a trick I should know about?

 

I'm not positve BUT I think they are on the drivers side on a Mack and there are 2 right along side of each other.

 

It probable has a canister the filter is inside of. A typical canister will have a large threaded bolt that runs through it from bottom to top on the side of the engine. As you un-thread the bolt the oil will start to leak down so be prepared for a bit of a mess.

OR, the filter might have been replace by a luberfiner that is not mounted on the engine but on the frame or ? It will have heavy rubber oil lines running to it. They hold about two gallons of oil and have a replaceable filter inside.

I've never owned a Mack, just old trucks, that weren't that old at the time :roll:
I do seem to recall twin filters on a Mack like Maniac mentioned, but a 1966 is pretty old so who knows ?

 

If it doesn't have a luberfiner, you should be able to expect a CARTRIDGE type filter. I don't believe many makers used the "spin-on" filters we have now. It means you will have to take a cannister apart and replace a cartridge much like many of the fuel filters today.

 

Well, I used to work on Macks, but the oldest ones I messed with were made in the late 70's. They were about the same as newer Macks. Two spin-on oil filters on the driver's side, under the oil cooler, and a centrifugal oil filter inside a canister beside the spin-on filters. The canister had a 1 1/2 inch rubber drain hose clamped to the bottom of it. I think your truck is the same, but I'm not sure.