72 ford diesel

Gerald12/48

New User
I have a 1972 ford diesel that has been rebuilt new bearings crank was turned head done, galley plugs are both in one in front one in the rear,
started but won"t build oil pressure has a new oil pump, and new rear crank seal. Help
 
Won't build oil pressure or the pump won't pump oil? Are you depending on the idiot light to tell you if it has oil pressure or have you screwed a gauge in where the sending unit goes. Need a Little more Info.Did you do the rebuild? Did you prime the pump? Is the oil pump drive gear engaged to the camshaft and the coupling shaft connected? I have rebuilt dozens and dozens of the engines and I have never had a single one that didn't have at least 60 Lbs of oil pressure on start-up. You're missing something.
 
the block was assembled by the machine shop pistons, rods and crank. Crank was turned to 10 under I have plasma gaged the crank and it is in spec. Put a new oil pump in and primed it. I put a pressure pump sprayer to the gage fitting in the block pumped oil through the system am getting a flow coming from above the rear main crankshaft seal. When I have had it running it would squirt oil out of the oil gage fitting about 4 inches but when hooked to the gage it won't push oil up the line to the gage so it is not building any oil pressure, am going to take out the oil pump drive shaft and recheck it it seem to be ok when I installed it. I'm just trying to find out if I missed something on the top end. Any ideas that you have will sure be helpful.
 
if... you have a long line to gauge.. you will need to bleed the air out of it... loosen the fitting at the guage while running till oil comes out, then tighten...
 
yes I have had the line off the gage when I was checking it is there something else in the top end that would be the cause.
 
(quoted from post at 21:05:46 10/03/17) yes I have had the line off the gage when I was checking it is there something else in the top end that would be the cause.

I have installed a few new oil pressure gauges and never had to bleed a line. The pressure compresses the air in the line and all the air in the curled up tube in the gauge, no problem.
 
(quoted from post at 07:48:40 10/04/17)
(quoted from post at 21:05:46 10/03/17) yes I have had the line off the gage when I was checking it is there something else in the top end that would be the cause.

I have installed a few new oil pressure gauges and never had to bleed a line. The pressure compresses the air in the line and all the air in the curled up tube in the gauge, no problem.
greed, air pressure/oil pressure, gauge reads either equally.
 
(quoted from post at 21:05:46 10/03/17) yes I have had the line off the gage when I was checking it is there something else in the top end that would be the cause.

Do you have oil coming out of the rocker arm shaft?
 
haven't checked that yet but haven't ran the motor long enough to check it only ran it a few minutes, am going to try and build a shaft and try to run the oil pump with a drill if I can't find something wrong with the shaft and drive gear it's self,
 
well it's not the drive gear it checked out, question has any one ever tried putting air back through the oil gage fitting on the block to find where the oil is going.
 

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