I am working on a 96 7.3 with a crank no start. High pressure resivoir empty. Filled with oil ran fine then died no low oil pressure. removed pump coller filter head and pick up tube with no signs of problems. Passages not plugged in any fittings. Any help would be appreciated.
no oil pressure
- Thread starter jwendt
- Start date
Still no oil pressure
So far I have reassembled the engine enough to crank over and recheck everything. With the oil cooler disconneted I can crank the engine over and get a good flow of oil. I built a plate to block the pump discharge with a gauge plumbed in to the plate. I crank the engine with 0 psi. I ordered a new oil pump with housing. Ford sent me the internal oil pump parts and the whole aluminum front cover $500+ . Looking at the new front cover i found two oil pump discharge ports that go directly into the block bypassing the cooler and the filter. These ports both about 3/4 in diameter are not on any of the lubrication drawings that i have. Anyone that knows about them care to share a little info with me. thanks.
So far I have reassembled the engine enough to crank over and recheck everything. With the oil cooler disconneted I can crank the engine over and get a good flow of oil. I built a plate to block the pump discharge with a gauge plumbed in to the plate. I crank the engine with 0 psi. I ordered a new oil pump with housing. Ford sent me the internal oil pump parts and the whole aluminum front cover $500+ . Looking at the new front cover i found two oil pump discharge ports that go directly into the block bypassing the cooler and the filter. These ports both about 3/4 in diameter are not on any of the lubrication drawings that i have. Anyone that knows about them care to share a little info with me. thanks.
JOAT
I Found Nemo!
The only port that bypasses the filter I'm aware of goes to the HPOP reservoir. There is a valve that should shut it off once the pressure builds in the main oil galley. Even if there was a problem there it shouldn't cause no oil pressure.
Someone had a problem awhile back where there was some sort of bleed on the timing cover above the pump that had come out. Since you replaced the cover I wouldn't think thats the problem.
Haven't had one of these apart far enough to give you a good place to look.
My suggestion (what I would do) is drop the pan, then with air pressurize the system through the port on the side of the rear cooler header. Then look for severe leaks
Someone had a problem awhile back where there was some sort of bleed on the timing cover above the pump that had come out. Since you replaced the cover I wouldn't think thats the problem.
Haven't had one of these apart far enough to give you a good place to look.
My suggestion (what I would do) is drop the pan, then with air pressurize the system through the port on the side of the rear cooler header. Then look for severe leaks
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