rocker arms falling off

[Blue88Coupe]

I have a buddy with 302, and roller rockers. It has the crane cam lock nuts on arp studs. The problem is after we set the lash (new motor) then run the motor a random rocker arm will have fallen off. The nuts are getting about a 4-5 thread bite on the stud and the allen lock nut is engaging the stud as well... Are there any tricks or something that I don't know about to keeping them from backing the nut off?
Thanks
-Nick

[91CoupeMike]

I had that happen when I was in a hurry.

I had forgotten to go back and do another 1/8 or less turn to lock down the nut.

Set the lash
1/4-1/2 turn
Screw down the Allen key
And another 1/8 or so until it tight turning both the nut AND Allen key.

[Blue88Coupe]

I had that happen when I was in a hurry.

I had forgotten to go back and do another 1/8 or less turn to lock down the nut.

Set the lash
1/4-1/2 turn
Screw down the Allen key
And another 1/8 or so until it tight turning both the nut AND Allen key.

If I add 1/4 to 1/2 turn on it my lash is going to be way off (solid lifter)

[ktm300hater]

4 or 5 threads doesn't sound right. Are you sure pushrod length is correct. I'm pretty sure mine screwed on like 8-10 threads

[91CoupeMike]

4 or 5 threads doesn't sound right. Are you sure pushrod length is correct. I'm pretty sure mine screwed on like 8-10 threads

That does seem short.

Are they pushing through the threads or backing off?

[91CoupeMike]

If I add 1/4 to 1/2 turn on it my lash is going to be way off (solid lifter)

Well shit I've never messed with solid roller so I'm out!

[Cooter]

you need to increase the level of dog shit that you tighten out of the allens

[91CoupeMike]

Can find find lash, turn back 1/8 turn. Set the Allen and and then tighten to set the lash?

[Blue88Coupe]

That does seem short.

Are they pushing through the threads or backing off?

They're backing off. Threads are ok

[Blue88Coupe]

you need to increase the level of dog shit that you tighten out of the allens

I've got the 3/8" rachet with a good allen bit on the end and have been cranking the shit out of it. I can see the stud distorting from the pressure. I'm about to loctite this shit together!(not really.)

[sickpony]

Push rods? X2 or bad locks.. Shouldn't fall off.

[Blackpony]

Not sure I would trust just 4-5 threads to hold what should be 400+ lbs of spring pressure. I second checking pushrod length and if that is ok verify you have the correct studs.

[Blackpony]

Oh and to help getting them tight, tighten the nut down to proper lash then back off about 1/8 turn, tighten Allen nut then re tighten the larger nut back 1/8 turn. Lash should be fine and poly lock should be nice and tight.