Quote Originally Posted by 87blazen
I Have A 1987 S-10 Blazer I Ordered A 4-bolt Main Vortec 350 From Gm It Came With A Street Domanator Intake Already Machined To Fit The Engine,so When I Put It Together I Used The Old V Style Belts And Old Style Water Pump The Truck Runs Great But In The Summer I Have To Run A 160 Degree Thermostat To Get It To Run 190 Degrees.and It Will Still Run To Hot On Longer Trips Or If Im Pulling A Long Hill.now I Have Been Told That The Vortec Engines Water Pump Turns Counter Clockwise But Mine Is Running Clockwise Does This Matter Or Could This Be What Is Causeing My Hot Problem?
P.s.i"ve Already Put In A New 4-row Radiator.
i don't know which way its suppose to turn, but if it was turning the wrong way i think it would run hot all the time. i've seen that done and they run hot in the shop. what kind of fan are you running?