McNugget
Member
- Location
- Lincoln, NE
1946 Ford 2N, eternal rebuild...
How can one confirm that the oil pump is primed and working as needed? What kind of pressure should build when trying to start (plugs removed, like a compression test)?
Long, nearly 8 year old story:
I"m putting together my 2N the second time. The first time a head stud pulled out of the block as an insert failed. Block had been forge welded to repair a freeze crack. Good news: I didn"t freeze the block. Bad news: I bought it with a cracked block. Anyway, I found the failed stud location when re-torquing after a short run up to temperature. Water started pooling on the head and it basically killed the joy of getting everything up and running. Tear it down, new insert, build it back up (a year long process...). Today I caught that the cam thrust washer (8N6276) and mating cover (timing cover, 9N6019) had severe wear. Oil pressure had been low, ~15lbs, though I blamed it on the braided, not steel, line leading up to the gauge. Now I"m thinking the oil pressure never pushed the spring poppet open and the timing gears hadn"t been getting lubricated. Actually, I know the timing gears were not getting lubricated as I have the evidence sitting on the bench. I also noticed the oil filter hadn"t completely filled, so the line to the governor was dry.
The machine shop had rebuilt the oil pump (reamed the bushing, pressed it together). I packed it with grease and then primed it with oil. Cranked with the gauge disconnected and found a puddle of oil on the floor. I thought that was confirmation of the pump pumping. Pick-up tube is solid, no leaks. Bearings fit and Plastic Gage confirmed the bearings were tight. Wires down all the galleys, so all galleys clear. Did not spin any bearings, so there must have been some pressure, but not enough.
Anybody looking for a basket case? Lots of good parts... I"m kind of tired.
How can one confirm that the oil pump is primed and working as needed? What kind of pressure should build when trying to start (plugs removed, like a compression test)?
Long, nearly 8 year old story:
I"m putting together my 2N the second time. The first time a head stud pulled out of the block as an insert failed. Block had been forge welded to repair a freeze crack. Good news: I didn"t freeze the block. Bad news: I bought it with a cracked block. Anyway, I found the failed stud location when re-torquing after a short run up to temperature. Water started pooling on the head and it basically killed the joy of getting everything up and running. Tear it down, new insert, build it back up (a year long process...). Today I caught that the cam thrust washer (8N6276) and mating cover (timing cover, 9N6019) had severe wear. Oil pressure had been low, ~15lbs, though I blamed it on the braided, not steel, line leading up to the gauge. Now I"m thinking the oil pressure never pushed the spring poppet open and the timing gears hadn"t been getting lubricated. Actually, I know the timing gears were not getting lubricated as I have the evidence sitting on the bench. I also noticed the oil filter hadn"t completely filled, so the line to the governor was dry.
The machine shop had rebuilt the oil pump (reamed the bushing, pressed it together). I packed it with grease and then primed it with oil. Cranked with the gauge disconnected and found a puddle of oil on the floor. I thought that was confirmation of the pump pumping. Pick-up tube is solid, no leaks. Bearings fit and Plastic Gage confirmed the bearings were tight. Wires down all the galleys, so all galleys clear. Did not spin any bearings, so there must have been some pressure, but not enough.
Anybody looking for a basket case? Lots of good parts... I"m kind of tired.
