Put in a 195 and check your heater core. Temp on inlet and outlet hoses should be the same if its flowing properly. I know it seems like thats not how it should be,but it is in fact the way it works. A funnel on a long piece of heater hose,cup of water and stick a blow gun behind it. A couple blasts of air followed with more water and air. I have done this many times, using only a few cups of water. Do this in both directions. I always catch what comes out the other end, to see whats in the core. Usually lots of gunk.Im from Manitoba,heat is a big thing around here.
If you split the heater core, it was either really plugged or on its way out. I havent split one yet.
