So I thought I would post here in hope someone could help me out as I am rather confused

Last week, driving along, nothing big just the usual 2,000RPM shifts and suddenly the temperature guage jumps to the hottest setting. Engine over heated and started dripping coolant. Managed to get it home all safe though.

First thing I thought was check the thermostat, however I can't find one at all. From looking at the engine I could only guess is was in the bottom water housing. Is this right?

I only ask this as I cannot find the thermostat at all in the bottom water housing. I find this odd as the engine has been holding its temperature great up till just last week. Is this possible or am I missing something obvious?

Cheers Fusion