With the head stripped it was time to give it a good blow through - using my Karcher pressure washer in every hole removing any build-up and old antifreeze that had turned to sludge. Then with some degrease solution, fine wire wool and brass wire brush I de-coked the build up of carbon from the chambers.
While doing this a had the valves and springs in the ultrasonic cleaner. After 20 minutes the carbon around the valves had softened up allow me the gently sharp if off and a quick go with a wire brush in my drill to remove any remaining bits. One set at a time so they wouldn't get mixed up.
4hrs
