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Old 09-22-2013, 02:03 PM
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Oil feed hole in Roller Lifters

I am installing a roller cam in my 383 SBC. I have never used a hydraulic roller cam. Do the oil feed holes need to face in a certain direction? I am pretty sure that it is not critical. They are the new style GM lifters with the spider, not the tie bar style. I just want to make sure before I button it up.

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Old 09-22-2013, 05:08 PM
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You talking about the cam bearings?
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Old 09-22-2013, 05:30 PM
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Quote:
Originally Posted by jaw22w View Post
I am installing a roller cam in my 383 SBC. I have never used a hydraulic roller cam. Do the oil feed holes need to face in a certain direction? I am pretty sure that it is not critical. They are the new style GM lifters with the spider, not the tie bar style. I just want to make sure before I button it up.
There's no wrong way that I have ever heard of...just look at it and make sure each side is equal on the lifter. If u don't see anything that isn't the same as the opposite side, drop em in! Good luck
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Old 09-22-2013, 07:46 PM
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Sorry I didn't make myself clear. Does the oil hole in the side of the lifter need to be oriented to the front or rear of the engine, or does it matter? I really don't think it matters, but a flat tappet lifter spins in the lifter bore and these roller lifters do not. So, I guess I am a little anxious about the orientation of the oil feed hole in the roller lifter. Like I said, I don't think it matters. I just want to make sure.
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Old 09-22-2013, 09:01 PM
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Originally Posted by jaw22w View Post
Sorry I didn't make myself clear. Does the oil hole in the side of the lifter need to be oriented to the front or rear of the engine, or does it matter? I really don't think it matters, but a flat tappet lifter spins in the lifter bore and these roller lifters do not. So, I guess I am a little anxious about the orientation of the oil feed hole in the roller lifter. Like I said, I don't think it matters. I just want to make sure.
It doesn't matter because all of those lifters will have pressurized oil on both sides of it...so either way oil will get to that hole and lubricate the lifter...if it were me I would face them all towards the rear of the engine even tho I have no specific reason for that lol

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Old 09-23-2013, 05:21 AM
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Quote:
Originally Posted by jaw22w View Post
I am installing a roller cam in my 383 SBC. I have never used a hydraulic roller cam. Do the oil feed holes need to face in a certain direction? I am pretty sure that it is not critical. They are the new style GM lifters with the spider, not the tie bar style. I just want to make sure before I button it up.
There's no "right" way to install the lifters- however they are when you drop them in will be fine.

A couple things:
Use only motor oil on the outside of the lifter, lifter roller, cam lobes and journals/bearings. The thick moly break in grease like used w/flat tappet cams is not needed and should NOT be used.

If the cam lobe has ~0.350" or more lift, there's a chance the dogbone can lose contact w/the top of the lifter so check this closely.

Adjusting hydraulic lifters
Valve train points to check
Valve train geometry
Valve spring installed height
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Old 09-23-2013, 10:26 AM
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Originally Posted by cobalt327 View Post
A couple things:
Use only motor oil on the outside of the lifter, lifter roller, cam lobes and journals/bearings. The thick moly break in grease like used w/flat tappet cams is not needed and should NOT be used.
Gotta ask why as I have generally used that moly lube on roller lifter 'wheels' and to the best of my knowledge, never had a problem. Is it needed? Probably not. Will it hurt? Can't see how. Usually when I along with many others, put an engine together, it's a while before it's started and then usually only after a good many revolutions setting the valves, pre lubing the LO system with a shaft through the distributor hole, then when installing the distributor itself. The roller will still turn, not slide as will any of the needle bearings and any oil hole wont be clogged as oil will be flowing up each pushrod to further lube the upper end. I do have to say that this assembly lube will collect in the pan regardless of oil changes which surprised me not too long ago with this latest build.

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Old 09-23-2013, 12:21 PM
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The only place the manufacturers (to the best of my knowledge) say to use a moly lube on a roller cam setup is on the ends of the pushrod, which would mean the pushrod cup of the lifter.

If you are using the red, runny lube like Comp uses or "assembly lube" that will pour as opposed to having a toothpaste-like consistency, there's little chance of a problem. It's when the thick, black break in lube is used- like Isky Rev-Lube and others like it that problems can occur. This type of lube does not run off- it's thick, sticky stuff and the roller can "skid" and not rotate when it's used on a roller cam lobe/lifter roller.
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