Decoking the head...

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

 

Ultrasonic cleaner...

A new toy turned up today from China via eBay - 2L ultrasonic cleaner, 60w, 40KHz frequency, 0-80C heater and 1-99 minute timer.

40KHz is fairly low compared to commercial units but they come at a high price. So it will interesting how well it works on the oily and carburettor parts.

Cleaned my glasses very well!

Engine breakdown... pt9

The oil pick-up pipe and strainer was full of the thick sludge oil from the sump.

I've order a 2 litre Ultrasonic cleaner which I'm hoping will help with all this cleaning especially the SU carbs when I get on to them.

Two bolt remove and lifted it off, yet another gasket to scrape off.

30 mins