Diagnose broken rocker

[priobe]

Thanks SoTxButler,

Is anyone using these rockers. I am serioursly considering buying a set. I have called several pushrod companys to have them walk me through the setup pf the pushrod.

All, have said that they like to use 2 -3 threads at the bottom of the rocker. Some will take a wire and place it in the oil hole to see the direct spray of the oil to the cup.

After measuring and measureing there is only 1 adjustment that can be made with the Dove rockers side to side or pushrod.

The pushrod is the correct length and can not bottom out on the bottom of the rocker.

Rick,
I believe you are right. The Dove rockers can not hold the pressure that the the springs have.


I wouldlike to find out if anyone is using the Garrett rockers and have any complaints.

I have to admit, I am a little doubtful spending $900 with a company that is not popular and that does not answer their phone all the time. This is why I am reaching to you guys to see if anyone has used them before I make my purchase.

[Eljaro]

When I got the new shortblock from keithcraft and got to install the rocker shaft I did come into problems.
This is what I wrote keith:

Dear Keith,

I was trying to adjust the valvetrain today, and have noticed that the pushrods you sent me (Smith Brothers NH34A-EB) are too long and that I can not adjust them properly because they do touch the rocker body even when the set screw is all the way turned out. So the pushrods are allways under preload. I can not raise the Dove rocker arm assy because it allready touches the valve cover at both ends, needing some grinding down.
The only solution is to use shorter pushrods, something like 1/8 to 1/4 less.
The pushrods you did send me are unused so I can send them back to have them changed against some shorter ones.

Keith did send me 0.250 shorter pushrods and all was well. For some reason the "correct" pushrod lenth is not correct and at least with the bulky aluminum rockers a shorter pushrod is the way to go.
I believe that this is one of the main issues when aluminum rockers break.