The rest of the construction was straight forward till we get to fit the pistons and barrels
Pressure blasted the heads, washed them with hot water and detergent and air pressure dried
I had old valves in the heads while using the burrs and Finnish smoothing and blasting the heads so didn't need to re-cut the seats. Lucky because the burr skated across the valves on a few occasions.
Re-machined the new valves (they didn't need it), binned the valves that came with the heads and lapped the new ones in.
I checked the new valve springs against Bentley spesifications and all were spot on. I don't need fancy springs with megga pressures cause I don't have larger valves and won't be revving the tits off the engine.
I lubricated the guides and reassembled the heads. There is a cast in boss near the spark plug hole that goes through the fins down to the combustion chamber at an angle. I machined the top of it and drilled down to near the chamber (more on that later)
Pressure blasted the heads, washed them with hot water and detergent and air pressure dried
I had old valves in the heads while using the burrs and Finnish smoothing and blasting the heads so didn't need to re-cut the seats. Lucky because the burr skated across the valves on a few occasions.
Re-machined the new valves (they didn't need it), binned the valves that came with the heads and lapped the new ones in.
I checked the new valve springs against Bentley spesifications and all were spot on. I don't need fancy springs with megga pressures cause I don't have larger valves and won't be revving the tits off the engine.
I lubricated the guides and reassembled the heads. There is a cast in boss near the spark plug hole that goes through the fins down to the combustion chamber at an angle. I machined the top of it and drilled down to near the chamber (more on that later)