Checked all the cables they all seem ok. Started car (not been started for over a week) and there was light blue/white smoke everywhere out the back.

Let it run till temp was in middle, all pipes are hot, the rads hot all the way across, the fan kicked in so i switched the engine off and wouldnt start again (flat battery sound again) but this time i left the key turned and the engine started slowly rumbling.

went back out an hour later to start it started first time but lots of smoke and the engines tapping like made then gets quiet.

a different garage said its got hydraulic lock (water getting into pistons when hot) but its not losing water or could it be the timing out. be grateful for any help cos im in two minds wether to get shot of it after owning it for 5 years