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G Oil Pressure (long post, sorry)
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Chalmersbob View Drop Down
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Joined: 11 Sep 2009
Location: Pennsylvania
Points: 2122 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Chalmersbob Quote  Post ReplyReply Direct Link To This Post Topic: G Oil Pressure (long post, sorry)
    Posted: 31 Mar 2012 at 5:34pm
I just got my rebuilt G started, but I don't have any oil pressure. I primed the pump first, have a good gauge on it, but have nothing. Yesterday I pulled the engine out about 2" so I could drop the oil pan to check the pick up. I wasn't sure if it was in right. It is about 1/4" off the bottom of the pan. I installed a T under the oil gauge and with a hand pump, pumped oil into the oil lines obtaining 20 pounds of pressure, enough to open the relief valve. I had oil coming out of the cam, the oil filter, and the oil pick-up tube. Today I bolted it back up and restarted it. Still no oil pressure. I added 2 more quarts of oil, 5 total, and attached my pump to the oil pressure tube again. I pumped it up to 20 pounds again, but it will drop off to 0 after I stop pumping. I'm ready to pull the engine off again and pull the oil pump off. Any Ideas what I'm missing? Sorry for the long post 
 
 
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Dick L View Drop Down
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Joined: 12 Sep 2009
Location: Edon Ohio
Points: 5087 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dick L Quote  Post ReplyReply Direct Link To This Post Posted: 31 Mar 2012 at 7:02pm
Did you have the oil pump apart? Have you taken the relief valve apart to make sure the poppet is seating?
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Chalmersbob View Drop Down
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Points: 2122 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Chalmersbob Quote  Post ReplyReply Direct Link To This Post Posted: 31 Mar 2012 at 8:31pm
Dick, I had the pump apart, checked tolerances and removed the relief valve. It will hold 20-25 lbs of pressure before it pops Thanks. Bob

Edited by Chalmersbob - 31 Mar 2012 at 8:31pm
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Chalmersbob View Drop Down
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Points: 2122 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Chalmersbob Quote  Post ReplyReply Direct Link To This Post Posted: 02 Apr 2012 at 10:55pm
I took the pump out today and found that the gasket kit had the wrong thick gasket.
It should have had a large hole in it with 2 horseshoe cutouts, instead it was the same configuration as the thin paper gasket. I didn't realize the problem when I put it together the first time, having never worked on a N62 before. The gasket was solid with 3 holes in it. The pump gears chewed the gasket material and jammed it in the gears and popped the shear pin in the drive gear. As far as I can tell, none of the gasket material got beyond the pump. Having had gasket sealer on it, it was gummy and stuck to the gears and the housing. Thanks Bob
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