GM/Detroit 6.5L – THERMOSTAT HOUSING CROSSOVER REPLACEMENT

DIESEL ENGINES
Remove or Disconnect (Figure 22)
1. Coolant from the radiator.
2. Crankcase depression regulator valve.
3. Generator upper bracket.
4. Bypass hose, upper radiator (inlet) hose, and heat­er hose.

5. Studs arid bolts.
6 . Coolant crossover housing assembly from the vehi­cle.
• The thermostat and coolant outlet are attached to the crossover housing assembly along with the thermal bypass nipple.

Clean
Coolant crossover housing sealing surfaces.
Install or Connect (Figure 22)
1. New gaskets.
2 . Coolant crossover housing assembly.
3. Studs and bolts.

Tighten
• Studs and bolts to 42 N.m (31 Ibs. ft).
4. Heater hose, upper radiator (inlet) hose, and bypass hose.
5. Generator upper bracket.
6 . Crankcase depression regulator valve.
7. Coolant in the radiator.
8 . Start the engine and run, with the radiator cap removed, until the upper radiator hose becomes hot (thermostat is open).
9. With the engine idling, add coolant to the radiator until the coolant level reaches the bottom of the filler neck.
10. Radiator cap to the radiator, making sure the arrows line up with the overflow tube.
11. Check for leaks.

 

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