Hi, found leaking coolant from hoses coming from the thermostat housing ass'y. Took off the hoses and check them for holes however they are fine. However the pipes (2 pipes : goes to heater and goes to the back tube)from the housing assy does not look good due to corrosions. I thinks is heavily corroded that is ate most of its length that is where the leak is coming from. Its my 1st time to do this so need your advice in whats the best thing to do... Also how can I take off the thermostat housing assy, any guide pix to show may help me fix this up the DIY way..BTW any special tools and materials that I need? Thanks.