afeng79
Well-known member
- Joined
- Apr 23, 2014
- Messages
- 107
- Reaction score
- 0
- Location
- Vandenberg AFB, CA
- My Car
- 1972 Mustang Hardtop
Hey all, I got around to get the 429 TJ motor in my 72 running. Everything is hooked up and no visible leaks anywhere after running for about 3 minutes at idle with occasional revs. I get in the car to turn it off and notice the oil light on the instrument panel is lit up. I quickly shut off the engine and start to worry. To make sure the sending unit wiring wasn't haywire I unplugged it from the sending unit while running and sure enough as expected it turned off. So now I know its not the old wiring sending a bad signal. Do I really have low oil pressure and if so how low? Well I unscrewed the oil pressure sending unit at the back of the intake manifold, left it off completely, turned the car on and for about 3 seconds watched the volcano of oil shoot out from the sending unit hole, deflect off the hood and go EVERYWHERE.
Ok so, now I'm confused. Doesn't this mean I have pretty significant oil pressure for it to shoot out like that especially at the very farthest point away from the oil pump? Could this be a bad brand new sending unit or is there something else I'm not considering? Please help.
Next step is to hook up a oil pressure gauge there and see what I got. I'll post the results once I do. Also, I did replace the oil pump and pickup before running the engine.
Ok so, now I'm confused. Doesn't this mean I have pretty significant oil pressure for it to shoot out like that especially at the very farthest point away from the oil pump? Could this be a bad brand new sending unit or is there something else I'm not considering? Please help.
Next step is to hook up a oil pressure gauge there and see what I got. I'll post the results once I do. Also, I did replace the oil pump and pickup before running the engine.