Another Priming Question
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Trailering
Joined: Apr 2022
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Another Priming Question
Just picked up a new to me 61 F100 with a 351w. Previous owner put new top end on a junkyard block and never fired it. I'm priming the oil and only getting oil to the #2 exhaust rocker (lots) I see a little oil pooling in the #5 intakerocker as well but that's it. Getting 50#'s on the guage. I've rotated the crank, still no change. Even got a new drill thinking maybe the RPMs were too slow on my old tire d one. Do I need to pull the intake and timing cover to check for a missing plug or just fire it up and see what happens?
Thread Starter
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Trailering
Joined: Apr 2022
Posts: 17
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Just picked up a new to me 61 F100 with a 351w. Previous owner put new top end on a junkyard block and never fired it. I'm priming the oil and only getting oil to the #2 exhaust rocker (lots) I see a little oil pooling in the #5 intakerocker as well but that's it. Getting 50#'s on the guage. I've rotated the crank, still no change. Even got a new drill thinking maybe the RPMs were too slow on my old tire d one. Do I need to pull the intake and timing cover to check for a missing plug or just fire it up and see what happens?
Cargo Master
Joined: Oct 2020
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I never use a drill to prime the oiling system I just turn the pump by hand using a 1/4 drive speed handle. The pump can be turned really slowly and still maintain reasonable oil pressure. With that said sometimes mostly depending on the lifters it can take a REALLY long time until all 16 rocker arms flow oil.
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Trailering
Joined: Apr 2022
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Well, I'm back to square one. Still only getting oil to the #4 intake rocker. Any thoughts? I pulled the intake and everything looked fine. About to pull the timing cover. I'd think of any plugs were missing I wouldn't be getting much oil to the rockers at all but #4 is a gusher and nothing to the rest.
Cargo Master
Joined: Oct 2020
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Trailering
Joined: Apr 2022
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I've done that already, no difference. After I replaced the lifters, I started to get oil pooling in the rockers so figured I was good to go and started it. Now at Idle up to 2k I'm only getting oil to the #4 intake.
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Cargo Master
Joined: Oct 2020
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It usually only takes about 10psi oil pressure to get a hydraulic lifter to operate. You say that only the #4 intake valve is getting oil so that one's the 2nd from the rear on the main galley in a 460. It seems like if a plug was out at the front or at the crossover and dumping pressure that it would be obvious. What's the oil pressure?
Cargo Master
Joined: Oct 2020
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sorry about that... They do have a single passage that feeds both lifter galleys at the rear of the block. It seems pretty unlikely that it would become restricted unless it was an engine that somebody did that for a race application.