Okay, that is about where I am. Cradock said "std 7 inch pushrods". Turner said the pushrods they use for engines 7:1 going to 8:1 are #546798 and they work. My pushrods are 546798. So I will put the rocker assembly back on the engine and very slowly turn it over by hand to see if one sticks...

no I can't replicate it. only happened a few times when I turn it over by hand. Beyond that it has been the engine running very rough, dying rather than idling, vacuum gauge reading ~5 psi indicating late valve timing or sticking valves. Rockers are handed and on the right and left way.

You're good. When it has jammed the rocker is in the valve max open position. The rocker is not free it is still compressing the valve spring. I don't really know about the pushrod. It seemed okay,but I did not try to rotate it. I just tried to put a 1/2 inch box wrench on the adjuster nut and...

Cradock said their pushrods are 7 inches long. I returned a note to clarify if they are actually 7 inches or like mine 7 3/16 inches. I'm holding on returning the rocker assembly to the engine until I have more information on pushrod length for my situation,

No I measured it. There is a 7 stamped on the raised pad on the head so it should be a later head.

The pushrods are sitting right in the pocket the way they should

I haven't put the rockers back yet. Perhaps tomorrow. Hoping to hear from Turner or Cradock about push rod length.

I am waiting to hear back from Turner Engineering and Cradock to see what they say.

Thanks for asking. The engine had been sitting in a barn in dry eastern California heat for, just guessing here, some 20 plus years. I brought it and a transmission back to Washington State to replace my SII engine & trans. Now it's a SIIa and trans to keep me occupied. So I have rebuilt them...

or maybe the brass cam follower although they were rising and falling of their own weight without the valve train pushing them. The camshaft is ETC 7128 and can be used on all the petrol and diesel engines up into about 1994. It has slightly more lift but will work in SII and SIIa and SIII...

Do you have a suggestion?

All the brass slides were moving smoothly when my wife turned the engine over by hand and I watched them move. So it is still a possibility that some are sticking enough while the engine is running. So far no bent pushrods!! So I think I'll just put the rockers back on and see what happens.

yes, that sounds good. I got . them in there with no problem. So that was my original thinking as well. If there is enough room to adjust tappet clearance then there should not be a problem. I just had the head off and valves apart. they are fine with new seals.

Hello! The rocker shaft is new and I pressed in new bushings on the rockers and honed them for a smooth but no wobble fit. Maybe they are too tight but they do spin freely.

I'm trying to find some shorter pushrods at 7.175 inch length. Rovers North has only my current length 7.1875 or 7 3/16ths. The problem is I had the head milled 100 thousandths, so the currently available rods are all a little longer like mine. If I am right(who knows?) and the rocker jams...

The valve was open at the time . I tapped the adjuster nut and the valve snapped shut. So the cam had moved off the peak lobe and the slack was between the pushrod and lifter slide. The valve was jammed in the open position for some reason.

Maybe~ the pushrods are just a little too long rotating the rockers a little too much in over the head of the valve stem and causing a binding which would delay the valve closing making the engine run rough like valves sticking. I have no bent pushrods which would make sense if the binding is...

The engine runs very rough like stuck valves or bad valve timing

According to Terry Ann pushrods for an 8:1 compression engine should be 7.175. The pushrods I have are 7.1875 or 12.5 thou longer. Maybe mine are too long? But I had room or space to set tappet clearance at 10-12 thousandths?

Thank you, I'm still trying to figure out the issue, but i agree with you.