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Engine Oil pressure help

  • Thread starter Thread starter Ncarter
  • Start date Start date Aug 29, 2022
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General karthief

wonder how much it would cost to ship you a pair
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Sep 13, 2022
#21
  • Sep 13, 2022
  • #21
Are you using the stock gauge or an aftermarket?
 

Bullitt347

I have been doing it wrong this whole time
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Sep 13, 2022
#22
  • Sep 13, 2022
  • #22
My fresh rebuild, with a high volume oil pump produces 40+ psi cranking. If I remove the distributor and turn the oil pump with a drill, I get about 80 psi.
This is verified with a mechanical oil pressure gauge and the electronic sender from the Holley Dominator ECU.
This is with the oil hot from a oil pan heater using 20-50 semi synthetic oil.
How hot was the oil? I could hear the oil start to boil when I pulled the distributor. I quickly unplugged the pan heater. Lol
 
Last edited: Sep 13, 2022
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Ncarter

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Sep 13, 2022
#23
  • Sep 13, 2022
  • #23
General karthief said:
Are you using the stock gauge or an aftermarket?
Click to expand...
Stock
 

General karthief

wonder how much it would cost to ship you a pair
20+ Year Stangneter
Aug 25, 2016
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polk county florida
Sep 13, 2022
#24
  • Sep 13, 2022
  • #24
Stick a cheap aftermarket gauge on the extension.
 

manicmechanic007

5 Year Member
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Sep 13, 2022
#25
  • Sep 13, 2022
  • #25
Did you prime it using a drill?
Did the drill start feeling like it had heavy resistance to spinning after the engine built up some oil pressure?
On a new working engine with a new pump, the drill will about stop due to heavy resistance (due to the oil pressure build up)
 

nickyb

I gotta say i never painted my nuts, Never Ever
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Sep 13, 2022
#26
  • Sep 13, 2022
  • #26
im thinking about what you said,no oil flow to extention and its clear, so maybe its clogged before the extention?
 

jrichker

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#27
  • Sep 14, 2022
  • #27
limp said:
Which direction are you spinning your drill?
Click to expand...
The drill needs to be a 1/2" drill set on low speed in order to get the pump to prime and move oil. It takes 60 - 90 seconds or more to get oil flow and pressure.
The drill needs to turn counter clockwise.

Look and the numbering on the distributor cap or firing order.
The HO firing order is 1-3-7-2-6-5-4-8.
Non HO firing order is 1-5-4-2-6-3-7-8
 
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AeroCoupe

lube between the nut and the face. I know my lubes
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Sep 15, 2022
#28
  • Sep 15, 2022
  • #28
You said you replaced the front cover gasket because of a leak. By front cover are you referring to the timing chain cover that the water pump bolts to? If so are you 100% sure you did not drop any of the old gasket material or sealant down into the pan? Only asking as it sounds like the oil pressure gauge used to work and since that timing chain cover reseal it no longer is showing pressure.

How many miles is on the motor? If you are getting alot of oil coming of out where the PVC check valve installs could be blow by which is indicative of a high mile motor. Also assuming the dip stick is reading full? There is supposed to be a PVC grommet and they can get hard and cause things not to seal.

Mustang PCV Valve Grommet | (86-95) 5.0 - LMR.com

Replace your missing or worn 1986-1995 Mustang 5.0 PCV valve grommet with this 5.0 Resto replacement!
lmr.com

I am leaning towards trash on the oil pump pick up tube screen and/or a worn out oil pump.
 

limp

wrap a little cheese around it and its a done
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#29
  • Sep 15, 2022
  • #29
Isn't there a plug in the oil gallery of SBF's that can come loose??
 
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