Changed the timing belt, water pump, tensioner and idlers as I saw no mention of it in the service booklet, and my van was at 140k km and 12 years. When we got in there, we saw clear signs of people being there before, and the belt looked no older than 2-3 years.. At least now it's noted in the service booklet. Water pump wasn't changed and showed signs of leakage, so it wasn't in vain.
Thermostat housing was also leaking, so that was also changed. The two bolts for the housing is the biggest pain in the ass I've ever experienced, had to grind a socket down in order for everything to fit in there. After a lot of swearing and elbow grease, I got it seated in the end.
Hopefully no more coolant leaks!
