Belt-Driven Radiator Cooling Fans

Belt-driven radiator fans are engine cooling fans driven directly by power from the engine via a pulley or belt from the water pump.

There are two main types of a belt-driven...

Belt-driven radiator fans are engine cooling fans driven directly by power from the engine via a pulley or belt from the water pump.

There are two main types of a belt-driven fan: clutch fans and flex fans.

Clutch Fans

Belt-driven clutch fans attach to a fan clutch. Most of the time, these fans are spinning at some fraction of the water pumps’ speed, but above a certain temperature, the thermostat in the fan clutch fully locks up, and the fan operates at the same speed as the water pump, drawing extra air through the radiator.

Flex Fans

Flex fans don’t have a clutch, so they spin at 100% of the speed of the water...

Belt-driven radiator fans are engine cooling fans driven directly by power from the engine via a pulley or belt from the water pump.

There are two main types of a belt-driven fan: clutch fans and flex fans.

Clutch Fans

Flex Fans

Flex fans don’t have a clutch, so they spin at 100% of the speed of the water pump all the time! Most flex fans also have flexible blades that flatten out at high speeds, reducing the parasitic loss of horsepower.

Belt-driven vs. Electric Cooling Fans

Which is the right fan for your application? Since their speed is tied directly to rpms, mechanical radiator fans are ideal for vehicles that operate at higher revs, like towing vehicles and off-road rigs. They’re also simpler, without sensors, wiring, or electrical draw to worry about.

There are a lot of advantages to switching to an electric fan: they take up less room, they’re more energy efficient, and you can manually deactivate them (a handy feature for off-road vehicles crossing water or mud).

For a complete discussion on the subject of radiator cooling fans, check out this article on our blog.

Top Brands

Summit Racing Equipment has everything you need for anything you drive, and that includes belt-driven fans in a wide variety of sizes and blade counts, plus stock replacement and restoration fans. Shop here for the best brand names in cooling, including Flex-a-lite, Goodmark, Dorman, Perma-Cool, Maradyne, Vintage Air, and many more.

Individual Parts

Part Groups

Results 1 - 25 of 47

Dorman Mechanical Fans 620-112

Radiator Fan Assembly, Ford, Mercury, Passenger Car, Pickup, SUV, 4.0/5.0L, Each

Part Number: RNB-620-112

4.44 out of 5 stars ( 9 )

Estimated Ship Date: Today

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Dorman Mechanical Fans 620-066

Fans, Mechanical, 7 Blades, Steel, Black, 22.050 in. Diameter, Dodge, Each

Part Number: RNB-620-066

4.33 out of 5 stars ( 6 )

Estimated Ship Date: Today

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Dorman Mechanical Fans for 1996-1998 EXPLORER, 1998 MOUNTAINEER - 620-152

Radiator Fan Blade - 9 Blade

Part Number: RNB-620-152

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Dorman Mechanical Fans 620-065

Fans, Mechanical, 9 Blades, Black Steel Hub, White Plastic Blades, 25.990 in. Diameter, Dodge, Each

Part Number: RNB-620-065

5.0 out of 5 stars ( 1 )

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Dorman Mechanical Fans 620-154

Fans, Mechanical, 7 Blades, Steel, Black, 18.800 in. Diameter, Ford, Each

Part Number: RNB-620-154

Not Yet Reviewed

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Dorman Mechanical Fans 620-155

Fans, Mechanical, 10 Blades, Black Steel Hub, White Plastic Blades, 18.150 in. Diameter, Ford, Mercury, Each

Part Number: RNB-620-155

Not Yet Reviewed

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Dorman Mechanical Fans 620-602

Mechanical Clutch Fan, Replacement Blade Only, Chevy, GMC, Hummer, Oldsmobile, V6/V8, Each

Part Number: RNB-620-602

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Dorman Mechanical Fans for 1993-1998 GRAND CHEROKEE - 620-043

Fan Blade, Radiator, Mechanical, Seven Blade, Steel, Black, 16.5 in. Diameter, Jeep, Each

Part Number: RNB-620-043

Not Yet Reviewed

Estimated Ship Date: Aug 25, 2025 if ordered today

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Estimated Ship Date: Aug 25, 2025 if ordered today

Dorman Mechanical Fans for 1996 EXPLORER, 1995-1996 RANGER - 620-149

Radiator Fan Blade - 12 Blade

Part Number: RNB-620-149

Not Yet Reviewed

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Dorman Mechanical Fans for 1997 EXPLORER, RANGER - 620-199

Fan, Mechanical, Replacement, 18.150 in. Diameter, 10 Blade, Plastic, Steel Hub, White, Ford, Each

Part Number: RNB-620-199

Not Yet Reviewed

Estimated Ship Date: Aug 25, 2025 if ordered today

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Estimated Ship Date: Aug 25, 2025 if ordered today

Dorman Mechanical Fans 620-450

Fan, Mechanical, 7 Plastic Blades, White, Clockwise Rotation, 16.00 in. Diameter, Nissan, 2.4L, Each

Part Number: RNB-620-450

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Dorman Mechanical Fans 620-058

ENGINE FAN BLADE

Part Number: RNB-620-058

Not Yet Reviewed

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Dorman Mechanical Fans 620-158

ENGINE FAN BLADE

Part Number: RNB-620-158

Not Yet Reviewed

Estimated Ship Date: Aug 25, 2025 if ordered today

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Estimated Ship Date: Aug 25, 2025 if ordered today

Dorman Mechanical Fans 620-160

ENGINE FAN BLADE

Part Number: RNB-620-160

Not Yet Reviewed

Estimated Ship Date: Aug 25, 2025 if ordered today

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Estimated Ship Date: Aug 25, 2025 if ordered today

Dorman Mechanical Fans for 2011-2013 1500, 2009-2010 RAM 1500 - 620-056

ENGINE FAN BLADE

Part Number: RNB-620-056

Not Yet Reviewed

Estimated Ship Date: Aug 25, 2025 if ordered today

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Estimated Ship Date: Aug 25, 2025 if ordered today

Dorman Mechanical Fans for 2005-2010 DAKOTA, 2006-2009 RAIDER - 620-062

Clutch Fan Blade

Part Number: RNB-620-062

Not Yet Reviewed

Estimated Ship Date: Aug 25, 2025 if ordered today

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Estimated Ship Date: Aug 25, 2025 if ordered today

Dorman Mechanical Fans for 1994-2008 RAM 1500, RAM 2500, 2000-2008 RAM 3500 - 620-037

Fan Blade, Radiator, Mechanical, Five Blade, Steel, Black, 19.49 in. Diameter, Dodge, Each

Part Number: RNB-620-037

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Aug 25, 2025 if ordered today

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Estimated Ship Date: Aug 25, 2025 if ordered today

Dorman Mechanical Fans 620-565

Clutch Fan Blade

Part Number: RNB-620-565

Not Yet Reviewed

Estimated Ship Date: Aug 25, 2025 if ordered today

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Estimated Ship Date: Aug 25, 2025 if ordered today

Dorman Mechanical Fans 620-619

Fan, Mechanical, Clockwise Rotation, 10 Blades, Plastic, Black, Buick, Chevy, GMC, Oldsmobile, Each

Part Number: RNB-620-619

Not Yet Reviewed

Estimated Ship Date: Aug 25, 2025 if ordered today

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Estimated Ship Date: Aug 25, 2025 if ordered today

Dorman Mechanical Fans 620-048

Fan Blade, Radiator, Mechanical, Five Blade, Steel, Black, 19.88 in. Diameter, Dodge, Each

Part Number: RNB-620-048

Not Yet Reviewed

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Dorman Mechanical Fans 620-161

ENGINE FAN BLADE

Part Number: RNB-620-161

Not Yet Reviewed

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Dorman Mechanical Fans for 1996 300ZX, PATHFINDER - 620-441

Radiator Fan Blade - 7 Blade

Part Number: RNB-620-441

Not Yet Reviewed

Estimated Ship Date: Aug 22, 2025 if ordered today

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Estimated Ship Date: Aug 22, 2025 if ordered today

Dorman Mechanical Fans 620-353

Engine Cooling Fan Blade, Clutch Fan Blade - Plastic

Part Number: RNB-620-353

Not Yet Reviewed

Estimated Ship Date: Aug 22, 2025 if ordered today

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Estimated Ship Date: Aug 22, 2025 if ordered today

Dorman Mechanical Fans 620-141

CLUTCH FAN BLADE

Part Number: RNB-620-141

Not Yet Reviewed

Estimated Ship Date: Aug 25, 2025 if ordered today

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Estimated Ship Date: Aug 25, 2025 if ordered today

Dorman Mechanical Fans 620-153

Radiator Fan Blade - 9 Blade

Part Number: RNB-620-153

Not Yet Reviewed

Estimated Ship Date: Aug 25, 2025 if ordered today

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Estimated Ship Date: Aug 25, 2025 if ordered today

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