Docile Iron rockers, couple of quick questions

[khryslerkid]

The oil passage was drilled right through into the section that mounts on the shaft. With the adjuster installed there is still plenty of room around it.

 

[Malicious]

Sorry I'm gonna sound stupid here, but I do get that it goes to the rocker shaft, I'm talking more about where it exits on the thread of the adjuster. Wont the thread of the adjuster block the passage? Or are you saying it will go around the adjuster and drop oil out of the outer hole where your arrow is?

I was assuming the outer hole was a 'left over' from drilling the shaft-adjuster passage and that the oil would travel from the shaft to the adjuster then drop down from the adjuster on the top of the push rod?

 

[lewtot184]

the adjusters with the hex head/interference thread are from slant sixes and the old poly engines; long gone. the idea on the oiling hole on the push rod side of the rocker is to dribble oil down to the cup. too many threads showing allows the oil to flip off the rocker and not get to the cup. i'm sure there are other factors like lobe lift (push rod travel/geometry) and push rod angle that can effect good oiling. the whole effort here is for valve train durability.

 

[khryslerkid]

Or are you saying it will go around the adjuster and drop oil out of the outer hole where your arrow is?

Yes!

 

[Malicious]

Gotcha! Thanks!

 

[khryslerkid]

lewtot184, this guestion might help others and myself.
When I was priming the engine, I had one rocker shaft hold down that was letting oil come out from under it. What's the fix, or won't it be a problem? I haven't took the time to investigate yet.

 

[Garys1969RR]

Wow, I never realized that the oil came thru the drilled passage to oil the push rod cup. And that's the reason for keeping the threads from sticking out the bottom of the rocker too far. Besides the std adjustable Crane rockers, I also have some Crane roller rockers I can use. I suppose the roller rockers are preferable to the ductile iron ones? I 'm sure the roller tips place less side force on the valve stem. Less friction too. So Crane Gold Roller rockers are preferable to the iron ones?

 

[Garys1969RR]

I like those blue rocker shaft hold down blocks. Those are nice, and a lot better than the stock ones.

 

[lewtot184]

lewtot184, this guestion might help others and myself.
When I was priming the engine, I had one rocker shaft hold down that was letting oil come out from under it. What's the fix, or won't it be a problem? I haven't took the time to investigate yet.

the only way i can think of for oil to come out the hold down is if it's not flat on the shaft. oil will bleed out the side of the rockers; could that be what your seeing?

 

[miller]

Might look at the rocker shaft oiling. Think it's second from the rear stand, how the shaft gets oil flow.

 

[66Satellite47]

Gee I may sure be stupid, but I thought the oiling to the screw was for cooling the adjuster. The spray around the rest of the valve train is what lubes the cups. Am I wrong here?

 

[lewtot184]

Gee I may sure be stupid, but I thought the oiling to the screw was for cooling the adjuster. The spray around the rest of the valve train is what lubes the cups. Am I wrong here?

the oil hole at the push rod end of the rocker oils the cup. the oil hole on top the rocker lubes the rocker/valve tip/springs and keep in mind the springs have to oil as a coolant.

 

[khryslerkid]

the only way i can think of for oil to come out the hold down is if it's not flat on the shaft. oil will bleed out the side of the rockers; could that be what your seeing?

I haven't ran this engine yet. I finished the build a few months ago and now I'm trying to get the engine compartment ready.
I was priming it by hand, on the stand, just to check all the oiling for the rockers when I noticed on just the one hold down, there was some oil coming out from under it. But you know what a mess these heads make when priming without a valve cover in place. So I thought I'll find an old set of covers to modify for priming the next time.
It must be that the hold down isn't seated on the shaft. It's on the "to do" list. I remember reading on this site before about someone having the same problem.
Thanks for your reply.

 

[lewtot184]

I haven't ran this engine yet. I finished the build a few months ago and now I'm trying to get the engine compartment ready.
I was priming it by hand, on the stand, just to check all the oiling for the rockers when I noticed on just the one hold down, there was some oil coming out from under it. But you know what a mess these heads make when priming without a valve cover in place. So I thought I'll find an old set of covers to modify for priming the next time.
It must be that the hold down isn't seated on the shaft. It's on the "to do" list. I remember reading on this site before about someone having the same problem.
Thanks for your reply.

i've seen heads cracked at the rocker stands were somebody has tried to shim the shafts up with the wrong kind of shims.

 

[khryslerkid]

i've seen heads cracked at the rocker stands were somebody has tried to shim the shafts up with the wrong kind of shims.

!!! It was definitely coming out from between the hold down clip and shaft. (Used hold downs/clip)

 

[66Satellite47]

Maybe that's what I meant to say.

the oil hole at the push rod end of the rocker oils the cup. the oil hole on top the rocker lubes the rocker/valve tip/springs and keep in mind the springs have to oil as a coolant.

 

[66Satellite47]

Ok, guess my memory has really failed me, not surprising. But I'm looking at a Crane style & an Isky rocker. The oil hole to the adjusting screw is to mainly cool the screw. That seems to me the spray from the remainder of the valve train lubricates the pushrod cup.

 

[khryslerkid]

These are the stamped rockers but can you see what the guys problem is? (Noisy valve train)

 

[66Satellite47]

Again an old guy view. I was looking at rocker arms. My Isky rocker arm is so much beefier than the one I think is a Crane or a Mopar. Guess I was smart 40 years ago when I was going with the Isky. They did wear due to my extreme RPM, but that's what I got.

 

[lewtot184]

Ok, guess my memory has really failed me, not surprising. But I'm looking at a Crane style & an Isky rocker. The oil hole to the adjusting screw is to mainly cool the screw. That seems to me the spray from the remainder of the valve train lubricates the pushrod cup.

the oil hole in the back of the rockers sole function is to lube the push rod cup and adjuster ball.