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By Richard - 13 Years Ago
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Geting ready to fire my 312, primed the oil pump spun the oil pump shaft with a speed wrench. Got 70 psi at the gauge. I get a small amount of oil through the shafts. Shows at No. 2 pedestal on the right head and No. 3 pedestal on the left head. Dove roller rockers.
I do not have the pedestal spill over flow tubes hooked up or holes plugged.
I hooked up the starter motor and drove the engine w/o plugs for about 30 seconds. Same thing
I thought I would see a lot of oil from the rocker shafts by now.
Please advise
Thanks, Richard
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By oldcarmark - 13 Years Ago
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They dont fill that fast Richard.If you do have oil showing now go ahead and fire it up.If you have oil just spinning the pump your are fine.
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By Rono - 13 Years Ago
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Hi Richard; I'm in the process of building a stroked and blown y-block and got some advice from a builder/racer that I know on pressurizing the rocker shafts. There have been several discussions on this subject and if you search the topic you will get several different approaches. What I plan on doing to get better oil flow to the rockers is this; cut the tapred end of the overflow tubes square, tap them with a 12-24 tap, use a 12-24 set screw with a 5/64" hole drilled through the center, install the set screw in the end of the tube with Locktite. This will give a metered flow to the dizzy drive and timing chain that could be changed if needed. Rono
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By Talkwrench - 13 Years Ago
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I did the same as Richard but with a hammer and a punch.. 
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By Richard - 13 Years Ago
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Currently nothing is coming out the overflow ends of the rocker shafts, spinning with the starter motor. If I do the set screw or punch thing or set screw this will increase the flow?.
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By stuey - 13 Years Ago
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have you checked your shafts are up the right way? stuey
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By Richard - 13 Years Ago
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I thought of this also. How do you tell, or do you have to pull them?
Thanks,
Rich
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By stuey - 13 Years Ago
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look at the right hand end of the shafts , where the overflow tubes fit and there should be a hole into the shaft. can check with a probe/ small screwdriver. stuey
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By stuey - 13 Years Ago
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Oldcarmark i've just been in the garage (and its cold) i've a rocker assembly on the bench and if the shaft is upside down access to the inside of the shaft is definitly blocked. can't say for certain if an overflow tube would still fit as mine is plugged with a grub screw, i doubt it as i thought the end of the overflow tube went into the shaft to locate it. another check on drivers side, 2nd pedestal in from fire wall if you can access the hole into the centre of the shaft then oiling to the rocker is blocked as shaft is upside down. may be ok for an Aussie Y-Block stuey
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By Moz - 13 Years Ago
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nope it will be upside down on our engines as well, we just dont have oiling problems because the oil runs down to our heads
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By Richard - 13 Years Ago
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Oil holes are correct at each end of the shaft. I figured I would get oil out of them spinning with starter motor. I tried using a speed wrench also. Maybe it just takes long, or I need to fill the oil filter, which seems to a messy ordel.
thanks,
Rich
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By Hoosier Hurricane - 13 Years Ago
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Richard: If you are cranking it with the starter motor and the distributor is out, you are not turning the oil pump. When you turn the pump with the speed wrench, are you turning it counter clockwise? The speed wrench or an electric drill will fill the oil filter, you don't need to remove it and fill it. Oops, just re read your first post. If you saw pressure on the gauge, everything is primed.
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