pushrod and adj rocker arm questions

[AZ-Nick]

I hope these are 2 or 3 simple questions.
1. Adjustable Rocker 273 Type: I keep hearing that the 3/8Ball plunger thread has an oil hole that will be covered if the thread showing below the arm is more than 2 turns! What if my 3/8 Ball plunger threads do NOT have any oil holes, does it matter if the threads stick out more than 2 turns like 3 to 4 turns?
2. I made a cam change and I checked the pushrod length with an adjustable checker and between 3/4 to 1 thread showing on the ball plunger. The new checker length pushrod needed is 7.590" from Ball to Cup with a .3125" Ball in the cup. My current pushrods that I have are .040" shorter at 7.550" length when installed will be an additional 1 turn of the screw showing, as in 1-3/4 to 2 threads showing before preload of .5 to 1 additional turns needed. Do you see any problems with 2-1/2 to 3 threads showing at my ball plunger with preload set?

 

[GTX JOHN]

Does the adjuster not have a recessed area on it
to align with the oil hole on the rocker on your adjusters?

In the old days, Mopar Performance recommend .250
to .280 protruding from the bottom of the rocker.

60+ Years ago, I thought it was really not important and
I burned up the Valvetrain with too short of pushrods.

 

[AZ-Nick]

Does the adjuster not have a recessed area on it
to align with the oil hole on the rocker on your adjusters?

In the old days, Mopar Performance recommend .250
to .280 protruding from the bottom of the rocker.

60+ Years ago, I thought it was really not important and
I burned up the Valvetrain with too short of pushrods.

No, it is threaded from end to end with no break between.

 

[AZ-Nick]

Does the adjuster not have a recessed area on it
to align with the oil hole on the rocker on your adjusters?

In the old days, Mopar Performance recommend .250
to .280 protruding from the bottom of the rocker.

60+ Years ago, I thought it was really not important and
I burned up the Valvetrain with too short of pushrods.

.250 to .280 from the top of the Ball to the rocker or just the threaded section?

 

[AZ-Nick]

The Rocker has an oil hole in the threaded area near the bottom of the thread hole and it oils the threads and flows to the ball in the cup.

 

[cookietruck]

That adjuster doesn’t look like it has a way to oil the pushrods

Do your pushrods have oiling holes?

 

[AZ-Nick]

That adjuster doesn’t look like it has a way to oil the pushrods

Do your pushrods have oiling holes?

Believe me It’s getting oil to the pushrods but I am sure it’s not the amount of oil it should be getting.
No oiling holes in the pushrods.

 

[cookietruck]

Believe me It’s getting oil to the pushrods but I am sure it’s not the amount of oil it should be getting.
No oiling holes in the pushrods.

The rocker has a hole in the body that sprays the pushrod/adjuster?

 

[AZ-Nick]

The rocker has a hole in the body that sprays the pushrod/adjuster?

See post #5 I agree, Yes it does

 

[AZ-Nick]

Can anyone tell me if I can use my shorter pushrod as I asked in Post #1?

 

[MOPAROFFICIAL]

I hope these are 2 or 3 simple questions.
1. Adjustable Rocker 273 Type: I keep hearing that the 3/8Ball plunger thread has an oil hole that will be covered if the thread showing below the arm is more than 2 turns! What if my 3/8 Ball plunger threads do NOT have any oil holes, does it matter if the threads stick out more than 2 turns like 3 to 4 turns?
2. I made a cam change and I checked the pushrod length with an adjustable checker and between 3/4 to 1 thread showing on the ball plunger. The new checker length pushrod needed is 7.590" from Ball to Cup with a .3125" Ball in the cup. My current pushrods that I have are .040" shorter at 7.550" length when installed will be an additional 1 turn of the screw showing, as in 1-3/4 to 2 threads showing before preload of .5 to 1 additional turns needed. Do you see any problems with 2-1/2 to 3 threads showing at my ball plunger with preload set?

Im sure it'll run with the shorter pushrods, but it'll be close.
What's right and what people run around with a lot of times are not the same thing. Ideal and acceptable, two different things as well. That's why I say it'll run

 

[AZ-Nick]

Im sure it'll run with the shorter pushrods, but it'll be close.
What's right and what people run around with a lot of times are not the same thing. Ideal and acceptable, two different things as well. That's why I say it'll run

Thanks for the honest answer, I don't want to be on the edge, I'm not comfortable with that. I guess I will recheck all my numbers over again with the pushrod adjustable checker and then order new pushrods

 

[MOPAROFFICIAL]

Thanks for the honest answer, I don't want to be on the edge, I'm not comfortable with that. I guess I will recheck all my numbers over again with the pushrod adjustable checker and then order new pushrods

Next time take a mic and set it at .040 and then hold it to the adjuster thread to see what that would look like.

 

[AZ-Nick]

Next time take a mic and set it at .040 and then hold it to the adjuster thread to see what that would look like.

Funny you should mention that. Yesterday I removed both sets of rocker arm shafts and rocker arms and brought them into my Engineering lab in the house and set each adjuster between.040”- .050” and now I can just measure the adjustable pushrod at each location I check.