Re: Oil Pump Sping or Springs?

Posted by Bob Carabbio on March 01, 1998 at 16:55:22

In Reply to: Oil Pump Sping or Springs?
posted by Tony Olinger on March 01, 1998 at 09:25:01

HEY Tony-
There is one spring that attaches to the bottom of the pump with a strap that spans two of the gear cover bolts.It's called the "short" spring by Bratton and others (#A6620).
On early '28 "A"s with the removable cleanout plate under the pump, the short spring is wrapped around the boss in the cleanout that the drain plug screws into, and not attached to the pump -it's the same spring though.
The "Long" spring (A6570) is located up inside the valve chamber, and holds the Pump/Distributer drive gear sleeve in place.It's around the distributer shaft.
I assume you're talking about the hole in the skirt of the engine block by the pan flange - this is a test port (1/8" NPT), and also is used to secure (as noted in earlier posts here) the pump in place while the pan is installed.If you're going to use a gage this is where you plumb it BUT "A"s only have about 2 P.S.I. when hot, so there's not much to measure.
The screen will keep big chunks and small mammals out of the pump teeth, but doesn't constitute a "Filter" in any but the broadest sense of the word.If you're a parade guy, then it's enough.If you're a daily driver, a FULL FLOW filter is a good thing.The "A-Ford-able" unit that Bratton and others sell would be my choice of a "Package".
Avoid like the plague any filter that attaches to the gage port in a standard engine.They are bypass types, and don't do much in a non-pressurized system like the "A".
A cheaper alternative if your motor is apart is the one I'm using that I've mentioned before here.The oil from the pump comes up along the pump shaft, then hops out through holes below the top bushing into the area where the gage port is.Normally it then goes up to the camshaft area through 2 slots in the oil pump pilot.I braze the slots closed, and cut a 1/16" "O" ring groovein the area for a sealing ring (do this before re-bushing the pump since it'll destroy the top bushing).This forces all the oil out the gage port which I enlarged to 1/4" NPT. from there through flexible lines to a Fram filter adapter and filter with internal bypass mounted on the frame. Then back into an additional 1/4" NPT hole drilled into the side of the block about 1.5" higher in the block so the oil comes in right at the drive gears/camshaft. I bought my filter adapter for $10 at a swap meet, so the damages are about $30 all told.
Bob Carabbio

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