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Oil supply during priming |
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Moffman 
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Joined: Sep/28/2011 Location: New Jersey Status: Offline Points: 287 |
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 Topic: Oil supply during primingPosted: Mar/25/2017 at 5:45pm |
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Had a quick question on something that bothered me while I was priming the oil pressure with a drill.
The first rocker that had oil flowing out the pushrod was the intake on cyl #1. Held steady low rpm's and it by itself was pooling enough oil before the others I had to stop so it wouldn't overflow on my floor. Tried it a couple more times and a couple others rockers on both banks had a slow flow but I had a couple that wouldn't prime in the amount of time I had, in order to get oil to them I had to use a small pick and plug that intake rocker on cyl # 1, which then I finally got all to prime. Wasn't able to go too high on the rpms due to no valve covers yet but when I did a quick burst oil was shot out of the same rocker a good foot across my garage floor. Is this normal? No oil modifications to the block. Pic attached is literally after spinning the oil pump by hand a couple rotations, not even with a drill.  |
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304-dude
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Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9082 |
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Posted: Mar/25/2017 at 6:12pm |
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Going from my way back period of dealing with my 304 and an emergency bridge stud repair. I had used dried up cork gaskets to limp to the parts store. Oil would find its way out of the cracked gaskets at idle, and I set mine around 650 RPM.
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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Moffman
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Joined: Sep/28/2011 Location: New Jersey Status: Offline Points: 287 |
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Posted: Mar/25/2017 at 6:49pm |
Wait what lol?
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304-dude
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Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9082 |
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Posted: Mar/25/2017 at 8:12pm |
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Just saying a lot of oil gets pumped up into the rocker assemblies. I imagine having no pumped up lifters allows a bit more oil to flow easier, thus the squirting beyond the lip of the head.
I think the amount of oil you see depends on lifter, pushrod, and rockers used. So in testing with a basically static engine, any number of variances can happen. I bet if you turn the crank every 60 degrees and do the same test, you will see some variance. Though now you have oil filled lifters so in comparing your initial tests, the original findings will need to be struck due to improper lifter loading before installation. I think the tsm has a section on loading up new lifters before installation. |
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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FSJunkie
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Joined: Jan/09/2011 Location: Flagstaff, AZ Status: Offline Points: 4742 |
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Posted: Mar/25/2017 at 8:28pm |
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Rotate the engine a couple of 1/4 turns while priming. Some lifters are up on their cam lobes and not registering with the oil gallery. Those lifters are also fully collapsed. You have to get them off the lobe for them to prime and flow oil. Rotating the engine through a couple of 1/4 turns also makes sure all the rods get oil. Partial groove main bearings don't supply oil to the rods until the oil hole in the main journal lines up with the groove in the bearing. If you prime the engine without rotating it a couple times, then some rod bearings will be dry.
Edited by FSJunkie - Mar/25/2017 at 8:33pm |
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1955 Packard
1966 Marlin 1972 Wagoneer 1973 Ambassador 1977 Hornet 1982 Concord D/L 1984 Eagle Limited |
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Moffman
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Joined: Sep/28/2011 Location: New Jersey Status: Offline Points: 287 |
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Posted: Mar/25/2017 at 8:39pm |
Ah, gotcha. I rotated it over about 180 degrees and didn't seem to make a difference. Maybe it needs to be rotated more. My concern was just why that particular rocker was getting so much more flow then the others. This is all aftermarket valve train too.
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304-dude
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Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9082 |
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Posted: Mar/25/2017 at 8:44pm |
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FSJunkie, has it right... I assumed you were just doing preload... and found some oiling variances. Now it looks like you did not go and rotate in 1/4 turns once the drill loads up from pressure. 180 degrees is only half the cycle, you need to do every 90 degrees and at least 4 times to make a complete bottom end cycle.
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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Zioamc
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Joined: Aug/03/2009 Location: kenosha Status: Offline Points: 3257 |
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Posted: Mar/25/2017 at 10:03pm |
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when I worked in the shop (AMC) i worked on a verifier by cold test and we used to get lifters that would shoot oil about 3ft over engine with valve cover off this was called an open lifter and would need to be changed what caused it was a small piece for debris in the lifter bore and we would save them for the lifter rep and he would take them apart to see what was wrong or what was the cause a lifter is quite a work of art when you listen to the rep explain how they are manufactured them it was very interesting
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.....1969 Sc/Rambler....
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FSJunkie
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Joined: Jan/09/2011 Location: Flagstaff, AZ Status: Offline Points: 4742 |
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Posted: Mar/25/2017 at 11:06pm |
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I didn't have a drill when I primed my 232 after a rebuild. I just turned the oil pump with a large screwdriver as fast as I could by hand until I saw oil at every rocker arm. One of them shot oil a good foot or two into the air and got me right in the face. After that experience I quit worrying about oil pressure on my engines. The rocker arms are the last things to get oil, and if I could force oil up to them just turning the oil pump by hand then I'm not worried about the oil delivery while running.
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1955 Packard
1966 Marlin 1972 Wagoneer 1973 Ambassador 1977 Hornet 1982 Concord D/L 1984 Eagle Limited |
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Moffman
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Joined: Sep/28/2011 Location: New Jersey Status: Offline Points: 287 |
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Posted: Mar/26/2017 at 11:01pm |
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Not too worried about it, just thought it was odd why that specific rocker was getting so much oil. Anyway while I got a thread up I also noticed oil weepage under the head of one head bolt. The others are all dry and I double checked the torque on him and he was good at 100 ft-lbs.
Definitely not tearing it back down for that little guy, hasn't fired yet like I said only oil pressure is by drill. Maybe it'll seal after running, if not I could try some sealer on the bolt. Kinda bizarre as I thought the holes were blind. Ah the joys of rebuilding. They're arp bolts, and the lubricant that came with them was used.  Edited by Moffman - Mar/26/2017 at 11:12pm |
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304-dude wrote: