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Yes drill it 1/2 inch.
The bottom of the passage is 5/8 or more. The passage above the plug is below half inch that's the part you are drilling out. You are not knocking the shoulder out of it.
My take on the oiling system crossover tube for the small block
- Thread starter Jadaharabi
- Start date
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Yes drill it 1/2 inch.
The bottom of the passage is 5/8 or more. The passage above the plug is below half inch that's the part you are drilling out. You are not knocking the shoulder out of it.
Alex5280
74' Duster
^ Got it Jada, thanks for the clarification. Drill baby drill!
mopardude318
Well-Known Member
Well this is where I'm at.. I overlooked that the oil pump I had on there was machined on the underside to clear the ARP main cap bolt.
no big deal I had a buddy make a cut on his mill to my new pump.
So here is the clearance Hughes engines did to the oil pump pick up, theres about a 1/16" to an 1/8" clearance from the rod to the pickup.
unfortunately I'm unable to get that same clearance with the new pump using the same pickup screwed into the same spot. this is seriously like .06 -.07 thousandths of clearance. I'll play around with it some more tomorrow. How much do I really need? LOL...
no big deal I had a buddy make a cut on his mill to my new pump.
So here is the clearance Hughes engines did to the oil pump pick up, theres about a 1/16" to an 1/8" clearance from the rod to the pickup.
unfortunately I'm unable to get that same clearance with the new pump using the same pickup screwed into the same spot. this is seriously like .06 -.07 thousandths of clearance. I'll play around with it some more tomorrow. How much do I really need? LOL...
nm9stheham
Well-Known Member
Do you mean .006-.007", or .06-.07" ? Is that the best with the pickup turned to the optimum point?
It seems like if that rod moves more than a few thousandths from the normal arc of motion, you're getting ready to have some big problems elsewhere.
Have you checked your rid side clearance? Looks 'snug'.
It seems like if that rod moves more than a few thousandths from the normal arc of motion, you're getting ready to have some big problems elsewhere.
Have you checked your rid side clearance? Looks 'snug'.
prochargedmopar
Well-Known Member
Oiling updates on mistakes made and subsequent failure trying to fix it.
Imma bout to get this. lol
Imma bout to get this. lol
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A oil pump gasket would give you a little more clearance.
anitrowarrior9
Well-Known Member
Is there any reason not to both tube the right gallery and do the cross over tube? And why not tube both sides?
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In using the tube method you do not need to lubricate the lifters on the other side of the motor and you are restricting the lubricating of the lifters on the passenger side also. You are in effect turning the lubrication of the solid lifters into a splash lubrication.
Use of the crossover tube is to make sure there is oil on the driver side of the motor for the hydraulic lifters and to lubricate the front main bearing and number one rod and of course restricting the oil in the passenger side galley.
The reason that you do not need to tube the driver side when you are tubing the passenger side is that you are going to block the flow of oil to the driver side by plugging the feed from the number one main going up to the galley on the driver side.
anitrowarrior9
Well-Known Member
So is there a preferred method? I will be running a solid non-roller lifter.
Either tube it or have the machine shop put bushings in each of the lifter bores.
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anitrowarrior9
Well-Known Member
Thank you.
mopardude318
Well-Known Member
Yea sorry I meant .008" originally. Eight thousandths..which aint much at all. Wish I had .060" clearance. LOL. I filed on that pickup tube a little bit more, there's 10 or 12 thousandths. plenty. but it is a little tricky to measure accurately. I think it'll be fine.
What should the rod side clearance be? I can check it. Again, I'm sure it's good.
Thanks, I think I got it!
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I may have already ask. What oil pan are you usings?
anitrowarrior9
Well-Known Member
Question on the full time cyl. head oiling. After tubing the block and blocking the opposite sides oil gallery. Wouldn't I then need a crossover of sorts from the tubed side to other side?
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Not if your oiling them from the cam.
mopardude318
Well-Known Member
I'm using a discontinued Moroso 7qt Drag Race oil pan. It has its own special pickup.
You can use a bottom mount pickup and not have all that problem of the rod getting near the pickup tube. Plus an increase of flow.
kevko 303-1
kevko 303-1
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mopardude318
Did you get it back together?
Did you get it back together?
mopardude318
Well-Known Member
Yes I did. I'm not going to install the engine back into the car just yet, I have to weld a bracket for my hydraulic clutch cylinder on my firewall. Next week maybe. ;)
Duane
Well-Known Member
I think you answered him incorrectly. He is saying he is going to do full time oiling which would indeed require a connecting tube from the main galley to each cylinder head rocker oiling passage.
If he was oiling from the cam it would not be full time oiling.
Unless I am misunderstanding his question.
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If you tubed the right side and blocked the left feed and have decided to block the oil feed from the cam to the heads yes you will need a cross over to feed the left side head.
Beneath the set screw, I drilled a small hole in to the main oil galley to feed the passage full time. To feed the left side you would replace the set screw with a fitting and put a line from it to the left side passage.
Be very careful when drilling into the main galley to line up correctly or you will hit the water jacket.
Duane
Well-Known Member
Agreed it's just that he specifically stated full time oiling which running a jumper tube is the only way to get it reliably.
Duane. post the picture of your crossover for the head oiling.
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Duane
Well-Known Member
The only
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