Operating instructions

4.6 Plumbing the System
4.6.1 General Information
The TTC with coolant circulating pump must be mounted at least 6" (15 cm) below the lowest
permissible coolant level of the vehicles cooling system.
Minimum amount of coolant in the cooling system should be at least 1.0 US gal. (4.0 l). Independent
heating systems require a minimum of 3.0 US gal. (12.0 l). A minimum of 10% of a good quality
antifreeze should be maintained in the cooling system at all times.
Heater and water pump fit 3/4f (19 mm) I.D. heater hose meeting SAE 20 R3 specifications.
Silicone hose requires special hose clamps.
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4 Installation Thermo Top C (TTC)
WARNING!
Burn risk! When working on the coolant system, allow the engine to cool down and open the
radiator cap
NOTE:
Heater hose must meet SAE 20 R3 specifications.
NOTE:
Hose clamps must be tightened to 45 in/LB. (5 Nm) torque. Silicone hose requires special hose
clamps.