Hi all, me again.
On Friday, on the way to the Bill Target rally SPARKY broke an exhaust valve push rod,:mad: at the time I didn't know what was happening, so pulled over and switched off as soon as was safe.
Had a good look round the engine expecting to see bits poking out of the side, but couldn't see anything wrong:undecided:.
After taking off the rear rocker cover it was obvious, so locked off the fuel for that cylinder, wedged the valve open, a very small amount and limped the last mile to the rally.
Anyway, to the question. Are the rods hollow just to save weight, and wear on the lifters, or is there another reason?
I was fortunate that I could call on the resources of a good mate who made another out of solid bar, and this got me the 40 miles home on Sunday.:-D
What material should they be made of? it seems to be mild steel with hardened balls in the end???
Any ideas and/or information will be gratefully received.
Regards. Alan.