heads and lights

[moshihus]

My trusty Surf finally succumbed to overheating with lots of white smoke and bubbling of water etc so reckoned heads gone. Left it for a couple of weeks until a mechanic suggested trying some K-Seal in it. Batteries were flat so recharged them and all looked well on instrument panel but the bugger wouldn't start and batteries ran flat again. Re-charged them and before trying again I noticed that the orange lamp stays on and all of a sudden the timing belt warning lamp is on.
I know its buggered and is going to the great scrappie in the sky however I'm curious to know why all these lights are coming on? - still doesn't start mind you!
Just keen to enlarge the knowledge base!! Your comments very welcome.

[J20]

If it won't turn at all, it might have water in one of the cylinders. Try taking out the glow plugs and see if it turns then. Any water will be blown out of the glow plug holes.