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Old 12-27-2005, 10:27 PM   #1
BuggeyEYED
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Default Priming Motor??

What should be done after building a motor and starting it up? I heard there should be a thing called "priming", i heard its basically flushing the motor with oil..how is this done and can i do it?
i hope this is the right section..if not move me..and let me know..thanks
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Old 12-27-2005, 10:32 PM   #2
overdose
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there's a green fuel pump relay connector in the passenger footwell behind the sill trim, disconnect and disconnect the connectors on the coil packs, crank the engine over and oil will circulate but fuel/spark won't happen (won't start), plug stuff back in and start normally
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Old 12-27-2005, 10:33 PM   #3
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Presumably you assembled the motor with the proper assembly lube for the camshafts etc. When you fill the engine with oil the first time the filter should be pre-filled. Actually this is a good practice to use all the time.
Before the engine is actually started, the ECU should be disabled by pulling the IGN fuse, then the engine can be cranked until it builds oil pressure. You can watch for the dash light to go out but to be absolutely certain there is good pressure it is a better idea to temporarily hook up a pressure gauge in place of the switch sender. The switch is calibrated for only 2-3 psi and you'd like to know the pump can build more than that.
Anyway once the engine has been primed the fuse can be reinstalled and the engine started.

edit- while you can use the method described in the above post, pulling the IGN fuse is an easier one-step procedure to prevent the engine from starting.
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Old 12-28-2005, 12:37 AM   #4
dru_hill
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You can't use the old drill on the oil pump shaft on a Subaru motor? Or is that just the ghetto cheap way and no one does that anymore? I liked that because you can see the oil coming out of the valvetrain and you can be sure nothing is blocked. But I have never built a flat motor before, so whatever.
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Old 12-28-2005, 07:50 AM   #5
Charlie-III
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Quote:
Originally Posted by dru_hill
You can't use the old drill on the oil pump shaft on a Subaru motor? Or is that just the ghetto cheap way and no one does that anymore? I liked that because you can see the oil coming out of the valvetrain and you can be sure nothing is blocked. But I have never built a flat motor before, so whatever.
Nope, since the oil pump on a Suby engine rides on the crank shaft nose, not off the cam/distributor drive like a Chevy SB (I used to build those as well).
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Old 12-28-2005, 03:40 PM   #6
dru_hill
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Well Im sure there is a reason that they are driving it from the crank. Probably so they dont have idiots like me putting drills down in the oil pump drive.
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