Thermostat – Cummins 4BT and 6BT Gen 1 Dodge 180 Degree 54mm

$35.00

This genuine Cummins 4BT and 6BT Gen 1 Dodge 180 Degree 54mm Thermostat is the correct thermostat to use in our HD high mount kit.  It will also fit in any B-series Cummins engine application with a water outlet that requires a 54mm thermostat.  This thermostat is vented and rated to open at 180 Degree F.

Cummins Part Number 3972071 and 3923331

Description

This genuine Cummins 4BT and 6BT Gen 1 Dodge 180 Degree 54mm thermostat (part 3972071) is the perfect thermostat for using with either:

  • Our HD high mount kit, or
  • Any B-series Cummins engine application with a water outlet that requires a 54mm thermostat

This thermostat is vented and rated to open at 180 Degrees Fahrenheit.  We include with your purchase the required thick o-ring seal (part 3923331).

Important installation note:

For installation, the vent pins must (1) move freely and (2) be oriented in the up position (i.e., facing 12 o’clock).   This positioning allows air to bypass around the thermostat and out of the cooling system.  If the thermostat is not positioned correctly, air will become trapped; in turn, the thermostat will not open correctly and potentially cause your engine to overheat.

Additional information

Weight .5 lbs
Dimensions 2 × 2 × 2 in

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