Notes: Counter Clockwise; Standard Duty Thermal Fan Clutch; w/ AC; w/ Rear Mounted Fan. Part Type: Engine Cooling Fan Clutch. Reverse Rotation Thermal Standard Duty Fan Clutch. Fan Clutch. 1987 Chevrolet S10 Blazer Engine: 2.5L L4; Counter Clockwise; Standard Duty Thermal Fan Clutch; w/ AC; w/ Rear Mounted Fan;.