The engine jammed again. There was no overheating prior to that. At first I suspected the propeller might have caught onto something but it was not. I prayed that it was not another broken valve and yes, it was really not a broken exhaust valve, but... a broken inlet valve. Darn... I need to dismantle the whole engine again!
This time, I had to do everything by myself because the mechanic got real sick of this problematic engine. At least he offered to be on standby call helpline in case I needed verbal assistance. The operation was really challenging. I tried to take photo and jot down notes for every step.
The damages were more serious than the previous time.
Piston crushed.
Valve broken and valve bent.
And broken pieces of valve metal fused into the piston.
Cylinder head and fuel injector nozzle damaged by valve parts crushed onto them by the piston.
I changed all the valves, the damage pistons and cylinders, cylinder head and all the gaskets. This operation was an expensive one too. Those days were tough but I learnt a lot of things. I should be able to overhaul the engines now with the new skills I've learnt though even the thought of it is quite tiring.
Many friends offered their help.
Thank you Edmund, Andrew, Thue Christensen, Wei Lun and special thanks to my father again and my brother too who helped me the most. Every time we would go home with extreme back ache. I really admire how tough the mechanics are now.
This picture sums it all up..
