Roller Lifters Orientation
Thread Starter
Member
Joined: Jun 2002
Posts: 491
Likes: 1
From: Hockessin, Delaware
Car: Red 91 RS Camaro
Engine: LO3 with Comp Cam
Transmission: 700R4
Axle/Gears: 4th gen rear
Roller Lifters Orientation
91 camaro with a 305 lo3
im rebuilding the engine and i need advice on which way the bleeder hole points on the roller lifters.
does it face front or rear of the engine?
im rebuilding the engine and i need advice on which way the bleeder hole points on the roller lifters.
does it face front or rear of the engine?
Originally posted by Odyssey
Umm... how do you point those holes down ? Do you put the lifters in sideways ? lol
Umm... how do you point those holes down ? Do you put the lifters in sideways ? lol
/ /
best way I can explain it without showing you myself.
Supreme Member
Joined: Apr 2001
Posts: 4,969
Likes: 0
From: USA
Car: yy wife, crazy.
Engine: 350, Vortecs, 650DP
Transmission: TH-350
Axle/Gears: 8.5", 3.42
I think what 25THRSS means is which way the oil holes face in relationship to the ground. He likes to have them all face the earth. Since they don't rotate like flat tappets, they stay the way you install them.
I have to say though, this is literally impossible. The weep holes for the oil are on the side of the lifter in relationship to the roller. They have to either be pointing to the rear of the block, or the front. That's if you're talking about factory rollers.
As RB says, it doesn't matter.
If it makes you feel better, install them all the same way.
I have to say though, this is literally impossible. The weep holes for the oil are on the side of the lifter in relationship to the roller. They have to either be pointing to the rear of the block, or the front. That's if you're talking about factory rollers.
As RB says, it doesn't matter.
If it makes you feel better, install them all the same way.
Trending Topics
Originally posted by AJ_92RS
I think what 25THRSS means is which way the oil holes face in relationship to the ground. He likes to have them all face the earth. Since they don't rotate like flat tappets, they stay the way you install them.
I have to say though, this is literally impossible. The weep holes for the oil are on the side of the lifter in relationship to the roller. They have to either be pointing to the rear of the block, or the front. That's if you're talking about factory rollers.
As RB says, it doesn't matter.
If it makes you feel better, install them all the same way.
I think what 25THRSS means is which way the oil holes face in relationship to the ground. He likes to have them all face the earth. Since they don't rotate like flat tappets, they stay the way you install them.
I have to say though, this is literally impossible. The weep holes for the oil are on the side of the lifter in relationship to the roller. They have to either be pointing to the rear of the block, or the front. That's if you're talking about factory rollers.
As RB says, it doesn't matter.
If it makes you feel better, install them all the same way.
Supreme Member
Joined: Jul 1999
Posts: 18,457
Likes: 16
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
my lifters had the holes facing either up or down
So, if it's an issue of whether the hole goes up or down, put the lifters in so that the roller is on the cam (down) and the push rod has a place to go (on the top). Let the hole go wherever it needs to.
Originally posted by RB83L69
Roller lifters have a roller on the bottom and a push rod seat on the top. That's pretty basic. I think it's probably more important to their function than which way the oil hole faces, though I could be wrong.
So, if it's an issue of whether the hole goes up or down, put the lifters in so that the roller is on the cam (down) and the push rod has a place to go (on the top). Let the hole go wherever it needs to.
Roller lifters have a roller on the bottom and a push rod seat on the top. That's pretty basic. I think it's probably more important to their function than which way the oil hole faces, though I could be wrong.
So, if it's an issue of whether the hole goes up or down, put the lifters in so that the roller is on the cam (down) and the push rod has a place to go (on the top). Let the hole go wherever it needs to.
duh. You can only put the lifters in 2 ways, with the holes facing towards the ground or the holes facing toward the sky. Others said that they could only face towards the front or the rear of the engine, but mine do not. Mine point towards the ground or the sky, which I chose to point them all towards the ground because like you said, for some reason it made me feel better. There really is no debate because I am 100% sure of where the holes were on my lifters. Thank you. BTW they were the stock hydrolic roller lifters from a 2000 Z28. Last edited by 25THRSS; Sep 19, 2003 at 02:55 PM.
Supreme Member
Joined: Jul 1999
Posts: 18,457
Likes: 16
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
Not to be an idiot, but..... from the lifter's point of view, toward the ground = toward the cam, and toward the sky = toward the push rod, no? This is a horizontal crankshaft V8, no?
I feel stupid somehow, I'm not seeing how it's possible to invert a lifter that particular way.
Are the LS1 lifters the same as the L03 ones?
I feel stupid somehow, I'm not seeing how it's possible to invert a lifter that particular way.Are the LS1 lifters the same as the L03 ones?
Originally posted by RB83L69
Not to be an idiot, but..... from the lifter's point of view, toward the ground = toward the cam, and toward the sky = toward the push rod, no? This is a horizontal crankshaft V8, no?
I feel stupid somehow, I'm not seeing how it's possible to invert a lifter that particular way.
Are the LS1 lifters the same as the L03 ones?
Not to be an idiot, but..... from the lifter's point of view, toward the ground = toward the cam, and toward the sky = toward the push rod, no? This is a horizontal crankshaft V8, no?
I feel stupid somehow, I'm not seeing how it's possible to invert a lifter that particular way.Are the LS1 lifters the same as the L03 ones?
Supreme Member
Joined: Apr 2001
Posts: 4,969
Likes: 0
From: USA
Car: yy wife, crazy.
Engine: 350, Vortecs, 650DP
Transmission: TH-350
Axle/Gears: 8.5", 3.42
Well let me pull one out of my ****. 
As you can see, the oil hole is on the SIDE of the lifter. Therefore front OR rear of the engine are the two choices.
I can't imagine the LS1 using the same lifters, but one time I imagined a purple haired Chevy fan in one of Vader's posts. :rockon:
BTW, did I mention I ate an L31.

As you can see, the oil hole is on the SIDE of the lifter. Therefore front OR rear of the engine are the two choices.
I can't imagine the LS1 using the same lifters, but one time I imagined a purple haired Chevy fan in one of Vader's posts. :rockon:
BTW, did I mention I ate an L31.
Supreme Member
Joined: Jul 1999
Posts: 18,457
Likes: 16
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
Oh I see what you mean.... makes sense now.... but I think a better word to describe which way it points might be "inward" or "outward", not "up" or "down".
But it's the same deal, that hole is what feeds oil pressure into the lifter from the gallery that it goes through, it makes no difference whatsoever which way it faces.
Sorry I'm so dense.
But it's the same deal, that hole is what feeds oil pressure into the lifter from the gallery that it goes through, it makes no difference whatsoever which way it faces.
Sorry I'm so dense.
Originally posted by AJ_92RS
Well let me pull one out of my ****.
As you can see, the oil hole is on the SIDE of the lifter. Therefore front OR rear of the engine are the two choices.
I can't imagine the LS1 using the same lifters, but one time I imagined a purple haired Chevy fan in one of Vader's posts. :rockon:
BTW, did I mention I ate an L31.
Well let me pull one out of my ****.

As you can see, the oil hole is on the SIDE of the lifter. Therefore front OR rear of the engine are the two choices.
I can't imagine the LS1 using the same lifters, but one time I imagined a purple haired Chevy fan in one of Vader's posts. :rockon:
BTW, did I mention I ate an L31.
Supreme Member
Joined: Jul 1999
Posts: 5,183
Likes: 42
From: Oakdale, Ca
Car: 89 IrocZ
Engine: L98-ish
Transmission: 700R4
Originally posted by 25THRSS
Just thought I would defend myself when someone else tried to make me look dumb.
Just thought I would defend myself when someone else tried to make me look dumb.
.Note: No refernce to anyone in this thread, just food for thought.
Supreme Member
Joined: Apr 2001
Posts: 4,969
Likes: 0
From: USA
Car: yy wife, crazy.
Engine: 350, Vortecs, 650DP
Transmission: TH-350
Axle/Gears: 8.5", 3.42
Originally posted by 8Mike9
Keep in mind, when arguing with a fool, an innocent bystander will never know who is who.
.Note: No refernce to anyone in this thread, just food for thought.
Keep in mind, when arguing with a fool, an innocent bystander will never know who is who.
.Note: No refernce to anyone in this thread, just food for thought.
Metaphors are for people that have nothing better to do with their time than make them up.

Here's one for ya...
The chicken that stuck it's neck out got the hatchet.
Thread
Thread Starter
Forum
Replies
Last Post
KO1
Engine/Drivetrain/Suspension Parts for Sale
16
Oct 15, 2015 05:00 PM
skinny z
Engine/Drivetrain/Suspension Parts for Sale
5
Oct 5, 2015 06:23 PM





