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Old 09-06-2005, 10:14 AM
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Priming a new engine

I've done it before, and had no problems, but I now have use of the internet. Is priming an oil pump with a long blade screwdriver OK if the oil comes up through pushrods. My problem is I started doing working on SBC when I was 14 and trying to dirt track. I didn't have a choice but to work on my on stuff. I didn't really know enough to work on my stuff, but i did anyway, and had pretty good luck as far as not tearing up stuff. To prime my engines, I just used screwdrivers until the oil pumped up out of the rear oil pressure gauge plug on the top rear of the engine. I never had any problem out of this. It's just the other day I was at an engine shop, and I saw them prime one with an high speed air tool for a while, and I know I can't do that by hand.

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Old 09-06-2005, 10:22 AM
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old distributor (less gear) or a moroso primer, spin the pump til you get pressure. Have seen people rotate the motor(by hand) while priming, however, can't comment as to the effectiveness of this
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Old 09-06-2005, 11:06 AM
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With all the assembly lube & cam lube in place & a full filter, is it really necessary?
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Old 09-06-2005, 11:10 AM
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Guess necessary is a determination to be made by the builder, however, I don't know any that do NOT prime before they light the motor off.
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Old 09-06-2005, 11:11 AM
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One builder has told me that priming at hi speed just washes away the assembly lube.
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Old 09-06-2005, 11:19 AM
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I have never "primed" an engine before ever... I simply put Royal Purple assy lube in the oil pump (helps create a suction) and made sure the filter was full before install and with 2 rounds of the crank it has oil pressure... And as stated with good assembly lube in the bearing & cam/lifters and a properly setup fuel and ignition system (so it goes right to cam break in rpm 1500-1800) it should not have a problem unless something was done wrong to begin with... (100+ engines over 25 years) mild to wild...
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Old 09-06-2005, 12:55 PM
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Engines should be primed until oil starts flowing through every pushrod. You can buy a priming tool, make one from an old distributor, or you can buy a pressurized can of oil. I have never seen a pressurized jug other than on Horsepower TV.
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Old 09-06-2005, 11:01 PM
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Quote:
Originally Posted by bracketeer
Engines should be primed until oil starts flowing through every pushrod. You can buy a priming tool, make one from an old distributor, or you can buy a pressurized can of oil. I have never seen a pressurized jug other than on Horsepower TV.
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I agree, then you know that oil is getting there ASAP when it starts.
I prime with a 14.4 volt battery drill or a 3/8 electric drill.... which spins the pump 4000 engine rpm.....

Which brings up another question. Why do people think a high volume oil pump sucks up too much horsepower to drive it...... if you can spin it 4000 engine rpm with a 1/4 hp electric drill and cold oil??? Does that make any sense to anyone but me?
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Old 09-14-2005, 11:56 AM
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Quote:
Originally Posted by Bumpstick
I have never "primed" an engine before ever... I simply put Royal Purple assy lube in the oil pump (helps create a suction) and made sure the filter was full before install and with 2 rounds of the crank it has oil pressure... And as stated with good assembly lube in the bearing & cam/lifters and a properly setup fuel and ignition system (so it goes right to cam break in rpm 1500-1800) it should not have a problem unless something was done wrong to begin with... (100+ engines over 25 years) mild to wild...
You mentioning the cam break in rpm is that due to the floating cam in the 350
Henry
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Old 09-14-2005, 12:14 PM
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one reason for the higher RPM at first startup is to allow the rods to sling alot of oil on the lobes while the cam run in is taking place.
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Old 09-14-2005, 02:07 PM
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[QUOTE=savman1] To prime my engines, I just used screwdrivers until the oil pumped up out of the rear oil pressure gauge plug on the top rear of the engine.QUOTE]

Your arms must be enormous

Vince
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Old 09-14-2005, 04:08 PM
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[QUOTE=302/Z28]
Quote:
Originally Posted by savman1
To prime my engines, I just used screwdrivers until the oil pumped up out of the rear oil pressure gauge plug on the top rear of the engine.QUOTE]

Your arms must be enormous

Vince
haha. I would rather start my engine dry than try to prime it by hand.




I bought a Moroso primer and used my Dewalt drill. It made life easy.
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Old 09-14-2005, 04:13 PM
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I have been primeing them for 40 yrs. I use an electric drill.
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