PLEASE help me with these roller rockers
Thread Starter
Melting Slicks
Joined: Mar 2002
Posts: 3,193
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From: Pittsburgh PA
PLEASE help me with these roller rockers
Hey guys,
Alright, I'm new to this engine building stuff, so this might seem dumb. I finally bought a set of aluminum heads (Dart Pro 1 200cc). I went to install my roller rockers today and realized that I have no idea how. The nuts that came with them fit right into the rocker, so you can't put a wrench or socket on it. In other words, the rocker has to turn with the nut. The problem is you can't rotate the rocker around because it will hit the springs. I was thinking that maybe I had to instal the rocker on the stud and then instal the stud, but then I'd have the same problem trying to screw in the stud.
Please help! These are aluminum 7/16" rockers. I'm not sure of the brand, but each one is stamped "350B1.5"
Thanks,
Jerry
Alright, I'm new to this engine building stuff, so this might seem dumb. I finally bought a set of aluminum heads (Dart Pro 1 200cc). I went to install my roller rockers today and realized that I have no idea how. The nuts that came with them fit right into the rocker, so you can't put a wrench or socket on it. In other words, the rocker has to turn with the nut. The problem is you can't rotate the rocker around because it will hit the springs. I was thinking that maybe I had to instal the rocker on the stud and then instal the stud, but then I'd have the same problem trying to screw in the stud.
Please help! These are aluminum 7/16" rockers. I'm not sure of the brand, but each one is stamped "350B1.5"
Thanks,
Jerry
Safety Car
Joined: Sep 2000
Posts: 4,679
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From: Charles Town WV
Re: PLEASE help me with these roller rockers (jerryjfunk)
Hey guys,
Alright, I'm new to this engine building stuff, so this might seem dumb. I finally bought a set of aluminum heads (Dart Pro 1 200cc). I went to install my roller rockers today and realized that I have no idea how. The nuts that came with them fit right into the rocker, so you can't put a wrench or socket on it. In other words, the rocker has to turn with the nut. The problem is you can't rotate the rocker around because it will hit the springs. I was thinking that maybe I had to instal the rocker on the stud and then instal the stud, but then I'd have the same problem trying to screw in the stud.
Please help! These are aluminum 7/16" rockers. I'm not sure of the brand, but each one is stamped "350B1.5"
Thanks,
Jerry
Alright, I'm new to this engine building stuff, so this might seem dumb. I finally bought a set of aluminum heads (Dart Pro 1 200cc). I went to install my roller rockers today and realized that I have no idea how. The nuts that came with them fit right into the rocker, so you can't put a wrench or socket on it. In other words, the rocker has to turn with the nut. The problem is you can't rotate the rocker around because it will hit the springs. I was thinking that maybe I had to instal the rocker on the stud and then instal the stud, but then I'd have the same problem trying to screw in the stud.
Please help! These are aluminum 7/16" rockers. I'm not sure of the brand, but each one is stamped "350B1.5"
Thanks,
Jerry
These are Harland Sharp roller rockers.
To lock the nut in place, you use an allen wrench and bind a set screw inserted into the nut against the rocker stud.
Can you post a picture of your problem? It almost sounds like you have a set of standard nuts for a set of roller rockers and you can't get the socket all of the way down in.
[Modified by Steve Straus, 2:20 PM 5/27/2003]
Safety Car
Joined: Aug 2001
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From: Waterford Mi
Re: PLEASE help me with these roller rockers (Steve Straus)
Sounds to me like you need different nuts than what you have. My Crane rollers came with nuts similar to Steve's but with a set screw in the center to lock them in place.
Thread Starter
Melting Slicks
Joined: Mar 2002
Posts: 3,193
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From: Pittsburgh PA
Re: PLEASE help me with these roller rockers (patsnitrovette)
Wow, I feel dumb. I had the nuts upside-down. I thought they went this way because all of the lock screw things were screwed right to the bottom.
But now I have another question... which way does the center part of the rocker (the part that the stud goes through) go? Theres a round side and a flat side. It seems like the round side would go down against the head and the flat against the nut, but I may be wrong.
Thanks,
Jerry
But now I have another question... which way does the center part of the rocker (the part that the stud goes through) go? Theres a round side and a flat side. It seems like the round side would go down against the head and the flat against the nut, but I may be wrong.
Thanks,
Jerry
Team Owner
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Re: PLEASE help me with these roller rockers (jerryjfunk)
Your right - the rounded side down.
Flat surface against the nuts flat surface.
Do not run the nuts very far down! If you run them down you can go into coil bind and bend push rods when you rotate the motor.
Flat surface against the nuts flat surface.
Do not run the nuts very far down! If you run them down you can go into coil bind and bend push rods when you rotate the motor.
Race Director
Joined: Dec 1999
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Re: PLEASE help me with these roller rockers (jerryjfunk)
You turn the pushod while tightening and feel for them to get tight, that's when you add another 1/4 to 1/2 turn, if the lifters still rattle tighten a little more but not much more than another 1/2 turn
This is when using hydraulic lifters
Marck
[Modified by Twin_Turbo, 2:59 PM 5/27/2003]
This is when using hydraulic lifters
Marck
[Modified by Twin_Turbo, 2:59 PM 5/27/2003]
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From: Renton Wa
Re: PLEASE help me with these roller rockers (Twin_Turbo)
Seems like you got the right information, But I have a quick question. I have always adjusted hydraulic systems, by the twisting method. The other day I was helping a friend, set his rockers on his engine, and his neibhor "very good mechanic" came over and noticed wht we were doing and said it's wrong and the way we were doing it would cause the lifter to be loaded too much. "though you could still twist them with your fingers". He said you tighten them down while rocking the rocker up and down with very lightly untill it comes in conact with both the pushrod and valve stem. "then an additional turn past that point. So basically you can still totally push the rocker down "load the lifter.
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Re: PLEASE help me with these roller rockers (WashingtonRacer)
Well, you may screw up doing it the first time but once you've done it this way a couple of times you can very accurately feel when all play is gone. That's why I always use 1/4 turn after zero lash to be on the safe side
The rocking method doesn't seem totally fool proof to me too as oil can dampen the rocking and give you a false sense of tightness
I think it's more of what method you like best
Marck
The rocking method doesn't seem totally fool proof to me too as oil can dampen the rocking and give you a false sense of tightness
I think it's more of what method you like best
Marck
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Re: PLEASE help me with these roller rockers (WashingtonRacer)
Yup. Don't rotate them. That can give you very inconsistent results as you can load a rocker and still be able to turn the pushrod pretty easily...but not always. I use vertical lash in the pushrod as the indicator. A little this way....no lash...a little that way...lash...a little less back the other way...and so on until I've pretty well defined the point of zero lash. Then another 1/2 turn or so.
Drifting
Joined: Oct 2000
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From: Shawano WI
Re: PLEASE help me with these roller rockers (jerryjfunk)
Jerry:
I don't know what size spings and retainer you have or what brand rockers.
If you have a larger diameter retainer , with some aluminum rockers the retainer will hit the bottom of the rocker at the point the retainer is closest to the stud.
If you have smaller diameter spings this is not a problem but is something I would check to be sure.
I don't know what size spings and retainer you have or what brand rockers.
If you have a larger diameter retainer , with some aluminum rockers the retainer will hit the bottom of the rocker at the point the retainer is closest to the stud.
If you have smaller diameter spings this is not a problem but is something I would check to be sure.
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Re: PLEASE help me with these roller rockers (jerryjfunk)
How much is too much? The problem that I was referring to is caused when you run the rocker nut down on a valve that should be open because the cam is already in the lift position. Then it would be way over lashed and cause coil bind. The best way is with your intake manifold off. So you can see what position your cam & lifters are in. Pour 5W-30 dino motor oil onto the nut and fulcrum area. It’s no problem because it should find it’s way to the oil return hole that you should have radius ground the lower lip out for quicker oil return.
Only run the all nuts down 4-5 threads and rotate your motor over 720 degrees and get back to number 1 cylinder TDC. It should rotate around with a few glitches from pistons transitioning from up to down stroke, but it should be free of binding. Any binding stops and find out why.
I always set my H-flat lifter with a feeler gauge and never had a problem. That rotation + plus a 1/4 turn was always to iffy for me. I now only use solid roller and have to use a feeler gauge.
Only run the all nuts down 4-5 threads and rotate your motor over 720 degrees and get back to number 1 cylinder TDC. It should rotate around with a few glitches from pistons transitioning from up to down stroke, but it should be free of binding. Any binding stops and find out why.
I always set my H-flat lifter with a feeler gauge and never had a problem. That rotation + plus a 1/4 turn was always to iffy for me. I now only use solid roller and have to use a feeler gauge.
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From: Charles Town WV
Re: PLEASE help me with these roller rockers (WashingtonRacer)
He said you tighten them down while rocking the rocker up and down with very lightly untill it comes in conact with both the pushrod and valve stem. "then an additional turn past that point. So basically you can still totally push the rocker down "load the lifter.
