Coolant leak! Oh no!
My dad and I had to sadly tear the top half of the motor apart on the ol girl... we had a coolant in cylinder 8... fear the worst had happened a crack in the head or the block we took it slow and steady, looking for anything that could have caused this issue.. we ended up finding that the back two bolts some how came loose, and took almost a full turn and a half to torque back down. (All the others didn't move much before they torqued back down). We also found a snapped intake manifold bolt on the same side. After about 3 weekends of work we got the parts ordered, cleaned, assembled, heads checked by a mechanic, intake re smoothed and leveled and back together! We put a 180 thermostate in to replace the 195, thinking she ran to hot. And havent had any coolant leaks since, but you know how it is with these older vintage vehicles.. them pesky oil leaks never go away lol.