[swimNdrive]

Hey everyone, I recently did an cooling system overhaul on my E46 M3 with 158k miles on it. I changed the water pump, thermostat, thermostat housing, the aluminum bolts, O-rings, and gasket seal. I already went through the overhaul process once a couple weeks ago to replace all the parts and found it was still leaking. I took the system apart down to the thermostat housing because the highest point of leakage was somewhere around the housing area. I've followed the directions exactly on reinstalling the housing and it still leaks. Any ideas as to where it might be leaking? My first guess is that I still didn't reinstall the thermostat housing correctly since its such a PITA to get it to fit completely... I'll post pictures up tomorrow.

Thanks in advance