Sloper pushrod tubes

[Oval57]

Well back on the job after a short break !
So question is ......when fitting the pushrod tubes on my S30-13 500 is there any O rings, seals or anything required ?
I'm assuming there is nothing on the tappet guide when that is screwed in, just tighten , can't really see we're an i ring would go on the bottom or sliding joint of the pushrod tubes, I was thinking of putting a copper or fibre washer were the pushrod tubes sit against the rocker box.
Am I on the right track ?
Cheers
Roger

[Steve.S]

No O rings or seals were fitted.
Yes, the tappet guides are just screwed in tight. I'm sure you know that the guides are locked by tightening the 2 long timing cover studs with scallops in them, so these go in first before you fit the guides.
You could fit a fibre washer at the top, but I've never found the need for one. Very little oil gets up there.
The Parts book shows 2 coil springs per pushrod. BSA call the heavier one a push rod return spring, and the lighter one a tappet tube spring. It would seem that the lighter spring would be at the top, simply to hold the upper pushrod tube in contact with the rocker box, and the heavier one would be fitted to the bottom to hold the pushrod in contact with the tappet/cam.
Manufacturers at that time were overly concerned with keeping the tappet in contact with the cam, hence the additional springs on the rocker arms.
The idea is that the spring tension of the lower spring could be adjusted by screwing the lower pushrod tube in or out as required. It is then held in position by the double eared spring clip locating with the groove in the pushrod tube. Therefore the pushrod tube is not tightened fully down onto the tappet guide. If you find it necessary, you could apply some Red Hylotite to the threads.
I hope this helps.