oil pressure

Hi;
I hav a 1960 cj5,all stock; not run much. Last time I started it,no oil pressure on gage (mechanical) I have since replaced the oil pump,pulled the pan and checked that oil pickup tube bolts were tight,pulled and blew out line on back of block,replaced gas in tank; Tried to start;motor turned over,no start; will check for spark and fuel to carb; any other suggestions? Thanks

 

cant help with the no start issue, but the first thing I would've checked on the oil pressure issue was the guage or sender unit. They both fail. If you had oil in the engine and no knocking or rattling I might have pulled off the oil fill cap to check for oil flow to the top end.

If the engine ran well with good oil pressure and then all of a sudden no oil pressure I'd first suspect a guage issue.

 

Take off the dist cap and crank and see if the rotor is turning. If not then the oil pump is not turning either.

 

Thanks you guys;I pulled dist cap,turned engine over dist rotated. Pulled oil pump cap off,oil came out.Packed gears with vasoline.Bought a pressure gage from Harbor Freight and hooked up to block,started engine,no rattles,but also no pressure on gage. Pulled oil filter canister top off,no oil into filter.Pump is new.Not sure what to check next.Any suggestions? Thanks

 

Could the pump gear shaft be spinning on the gear? It is a press fit isn't it? New pump made in China?

 

Bought the pump through NAPA,pump came from Kentucky

 

I guess it's running again then. Been a while since I was in a f134, but it's possible the pickup tube came off in the pan. you might have to pull the pan to see, but if you primed the pump, and it's working then it has to pump oil unless it's not getting to the pump for some reason. Only two I can think of is that the pick up has come off or it's clogged with junk.

 

let's confirm that the engine was once running and had oil pressure with whatever gauge, correct ?
engine not just rebuilt and being run for the first time ?
it's possible the pressure relief valve could be stuck open in the new pump.
also, the oil pump gear would have been held in place with a roll pin originally; is that how it is on the new pump ?
if you take the gear cover off, remove the gasket, bolt the cover back on, FSM says the gears shouldn't turn; should turn once the correct gasket is installed.
have you been using gaskets and not RTV ?
just a little more history and info might help.

 

there are oil galley plugs in the side of the block, remove 1 of them and spin the pump, if the pump is primind you should have oil squirting out the oil galley. When I primed the pump it can take a while but I could definitely feel the drill load up when the pressure came on. Do you feel it load ?

 

but on an F4 the oil pump is driven by the cam...and the oil pump drives the distributor...so he can't prime the pump that way if I recall my old F4 days.

 

the engine was once running, when I installed new pump,I didn't notice that there was no gasket between pump and cover.I just looked up oil pump in the service manual,and it shows a gasket; could the missing gasket be the problem?

 

it's possible, yes.

 

It's been a while since I rebuilt one, I thought the distributor shaft had a tang that fit into the pump drive. you could turn the oil pump with the distributor out, I'll look at the service manual tonight.

 

from my FSM
section D-65
end float of the rotors is controlled by the thickness of the cover gasket which is made of special material that can only be slightly compressed.
never use other than standard factory gasket.

 

chainsawguy

new oil pump doesn't have a gasket between cover and pump; old pump doesn't have one either.
I pulled pan;there was oil on the block,crank,etc.
Removed pickup tube,filter;cleaned and installed a new gasket on it.
Also checked that pipe plug in block was there and tight.
So it seems like I should have pressure,but no reading on gage,and I pulled oil filter cover off,no indication of oil visable on top of filter.About to give up!

 

The trapped air will not let it fill to the top. Was there any oil in the filter housing? If any oil is present, I would recheck, gauge, lines/tubing. fittings, starting at the engine block. Pull the gauge fitting out of the block, and confirm oil flow/no flow.

 

did you remove the pressure relief spring and valve ?

 

back in the 60's I worked part time at a Gulf gas station and there was a car that everyone questioned if the oil pump was working. Well I loosened the filter , just a little , and started the engine. Pump was fine oil sprayed everywhere, not the best way to test but it worked. On another note with hydraulic lifters wouldn't you know it if the pump failed? As you all have probably guessed I am not a mechanic.

 

small amount of oil in bottom of oil filter housing; will fill up housing with oil,then hook up oil pressure check gage.Thanks

 

No I didn't take pressure relief valve apart,I wouldn't know what to check for if I did. Thanks,