Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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Shop Street Rod Cooling At Speedway Motors

Speedway Motors has the cooling system components that performance street rod engines require! Depend on our quality universal aluminum radiators, water pumps, electric fans, coolant additives, and expansion tanks to keep your hot rod cool. View our great selection of flex cooling fans, high pressure radiator caps, radiator hoses, and water pump pulleys online! Get the best quality hot rod parts at the lowest possible prices from Speedway Motors!

"Street Rod, Engine Cooling Fan Sensors" Page 1 of 1

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  • SPAL Thermoswitch Relay and Wiring Harness Kit
    SPAL Thermoswitch Relay and Wiring Harness Kit
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    This easy to use cooling fan relay kit includes a labeled wiring harness, 40 amp relay, fuse holder and coolant sensor. Available with 185° on/165° off or 195° on/175° off. Works great with the Spal Pulse-Width Fan Controller.

    • Relay wiring kits are a must-have when installing an electric fan
    • Designed to safely integrate with OEM wiring
    • Waterproof 40/50 Amp relay
    • Printed wires (for ease of installation)
    • 3/8" NPT (National Pipe Thread) stainless steel switch
    • Optional switched override capability
    910-64028 Instructions (PDF)
  • AFCO 85286 Electric Fan Switch, 200 Degree On, 1/4 NPT
    AFCO 85286 Electric Fan Switch, 200 Degree On, 1/4 NPT
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    This AFCO electric fan switch uses a ground wire to turn the electric cooling fan on. The thermal fan switch features a 1/4" NPT threaded brass body with a spade terminal for hook-up. Cooling fan switch activates a cooling fan relay (not included, sold seperately) when the bulb is immersed in coolant that is 200° F. When the engine cools to 185° F, the contacts on the fan relay switch open, and the fan stops automatically. Make sure the temperature fan switch bulb is submerged in the HOT engine coolant.

    • Non-adjustable radiator fan sensor 
    • ON @ 200° F
    • OFF @ 185° F
    • Uses ground wire to switch current to fan
  • SPAL Cooling Fan Sensors, 3/8 NPT
    SPAL Cooling Fan Sensors, 3/8 NPT
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    The SPAL cooling fan switch features 3/8" NPT threads on a stainless steel, hermetically-sealed body. Thermal fan switch threads into your intake manifold or cylinder head and activates a relay (not included, sold seperately) when the bulb is immersed in coolant that is 185° F or 195° F, depending on which electric fan switch you use. As the engine cools, the contacts on the fan relay switch open, and the fan stops automatically.

    Make sure the electric fan switch bulb is submerged in the HOT engine coolant.

    • Non-adjustable radiator fan sensor 
    • Operating Switch Range: 35° F to 480° F
    • Max Current & Voltage: 3 amp, 32 VDC
    • Grounded case only