The Ford Barn

V8 Bob · 12-29-2018, 05:07 PM

I tried to find a thread or info similar to my problem with no success, so here it is....
I just ran a fresh 276" on my engine stand Thursday. Some details are Merc 30/30 crank, L-100 cam, Egge pistons, Chevy s/s 1.5 valves, Isky lifters, and 95% full flow oil system. The standard oil pump was purchased new but don't remember the source.

I pressure pre-oiled using a garden sprayer with 4 quarts of 10W30 Valvoline VR-1 and could develop 15 psi with very slow leak down, thinking there are no serious leaks and that the oil system is A OK.

Initial start-up resulted in about 40 psi oil pressure, which seemed low but adequate. Temps came up to the 180 T-stat ratings, the engine ran strong and break-in lasted about 30 minutes. Oil pressure, however, dropped to 10 at 900-1000 rpm, near 0 at very low rpm.

After a cold head bolt re-torque Friday, I restarted with the same 40-ish initial oil pressure and let it warm up while I re-set timing and adjusted the temporary single 94 carb (on a stock intake). All seemed well until I noticed puffs of smoke coming out the exhausts. A quick look at the gauges showed a solid 45 psi oil pressure a idle, with no movement when changing the rpm. After about a minute I shut it down with the same 45 psi reading.

I will pull the pan and remove the pump when time allows, but would like your input on what the heck happened or what the problem may be. Thanks. Happy New Year!

Bob

12-29-2018, 05:07 PM	#1
V8 Bob Senior Member Join Date: May 2010 Location: Granger (Northern) Indiana Posts: 1,586	Fresh 8BA oil pressure problem I tried to find a thread or info similar to my problem with no success, so here it is.... I just ran a fresh 276" on my engine stand Thursday. Some details are Merc 30/30 crank, L-100 cam, Egge pistons, Chevy s/s 1.5 valves, Isky lifters, and 95% full flow oil system. The standard oil pump was purchased new but don't remember the source. I pressure pre-oiled using a garden sprayer with 4 quarts of 10W30 Valvoline VR-1 and could develop 15 psi with very slow leak down, thinking there are no serious leaks and that the oil system is A OK. Initial start-up resulted in about 40 psi oil pressure, which seemed low but adequate. Temps came up to the 180 T-stat ratings, the engine ran strong and break-in lasted about 30 minutes. Oil pressure, however, dropped to 10 at 900-1000 rpm, near 0 at very low rpm. After a cold head bolt re-torque Friday, I restarted with the same 40-ish initial oil pressure and let it warm up while I re-set timing and adjusted the temporary single 94 carb (on a stock intake). All seemed well until I noticed puffs of smoke coming out the exhausts. A quick look at the gauges showed a solid 45 psi oil pressure a idle, with no movement when changing the rpm. After about a minute I shut it down with the same 45 psi reading. I will pull the pan and remove the pump when time allows, but would like your input on what the heck happened or what the problem may be. Thanks. Happy New Year! Bob