Still trying to get my head around this.
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.
Thanks for confirming that.
If the rocker/shaft was suitably worn, could the rocker bind on said shaft?
Yes but he said it was slack, which says (to me) the rocker is not binding. Then noted valve open and shut after “tapping”. Unless I read it wrong.
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.
Then the valve is bent or the valve seal collapsed/deteriorated?
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.
Have you put something together wrong? There's only so many possibilities
Do you have a suggestion?
I still can’t get past the slack. The valve spring should move the rocker arm against the pushrod and slider as it follows the cam lobe, while doing so the valve closes.
Did it work before you stripped it? If so then what had changed?
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 engines as well as some others that are newer as I understand it. But it required a shorter pushrod which I have. It still begs the question since I had the head milled that 100 thousandths perhaps the pushrods are a wee bit too long. Okay so they will go in and can be lashed properly, but that doesn't guarantee they are the right length for the rocker geometry does it?
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 both starting about two years ago.
