I've got a 1988 4.3/Alpha 1 RWC combo. Cruising temp runs 140-145 F. Never goes above 150 F even at extended (5-10 min) idle. Is this normal operating range?
yer right where i'd want my engine performin at..... yer richous......almost forget the auto mech in ya. this is marine application. the only auto mech that applys in marine is the most basic of engine functions....... yer t-stat starts to open at 140 and is full open at 160........if ya want to test it stick it in a pan of hot water with a thermometer and see what it does.....yer cool man......no pun intended.......
