The four replacement valve guides were completed today and they are now ready to fit. The cylinder blocks are with a friend at the moment who has a big CNC Mill and he has kindly agreed to machine the liner rebates in the bottom of the blocks for us – rather too much for our modest machinery! Steve is on the point now of ordering the four liners after deciding the final measurements, checking them and then checking them again to make sure that we have them correctly. At something like £130 each before the “add-ons”, we do not want any mistakes! All four cylinders, thankfully, have come out at an identical size after being re-bored.
I will post pictures of the Blocks as soon as we get them back so that you can see what has been done.
So onto the next job. We started to machine the Valve Caps a few weeks ago but they were temporarily put to one side where there were other more pressing matters.
The Caps for the Inlet Valves are quite different from the Exhaust Valves – the inlet ones were virtually finished but the flange on each of them has to be machined back to leave two “tabs” remaining on each which will lock into the tops of the cylinders.
Only one Exhaust Valve Cap was started and now we get on with the remaining three – all to be machined from cast iron bar. Again, similar machining is to be done to the flange to leave two tabs on each of these so that they can be locked into the cylinder top.