My buddy overheated his chainsaw. Melted the oil pump, chain break assy, and part of the housing. I've replaced the housing & chain beak assembly. The 4 bolts that hold the engine to the housing are also the crankcase bolts. Anyone know the correct torque for those 4 bolts? It is a 42 cc (2.6 cu.in) engine. The saw is basically a Poulan re-badged as a Craftsman.