I just replaced the circulating pump on my SBC (Volvo Penta) and afterwards I wondered if the 4 bolts that hold it to front of motor enter water jacket. Should I have used sealant on them (perfect seal or something similar to head bolts). My factory mnaual says nothign about sealig them. Also the pulley (V belt) wobbles and I put a dial indicator on it and it is the pulley, not the water pump shaft, I think maybe the center hole is slightly under sized and not sitting flat on flange. I might take pulley back off and chamfer the inner edge, will a slight wobble wear bearings or worst throw belt.
