GM 15857667
Reservoir Hose

To bleed out the coolant outlet pipe (RPO LY7), drain the cooling system. Reposition the radiator outlet hose clamp at the coolant outlet pipe and remove the radiator outlet hose from pipe. Then temperature sensor cable while supporting the camshaft carrier should be undone.next, you should remove the coolant outlet pipe bolts and then you also remove the coolant outlet pipe itself and then throw the old o-ring seal. For installation, you will connect a new coolant outlet pipe o-ring seal on the outlet pipe and put it on. Make sure to tighten the outlet pipe to thermostat housing bolt to 23 n.m (17 lb ft) as well as the outlet pipe to engine bolt to 50 n.m (37 lb ft). Recouple the radiator outlet hose to the coolant outlet pipe, relocate the hose clamp, and fill up the cooling system.

To change the engine coolant crossover pipe, start by removing the intake manifold cover, generator, generator drive belt idler pulleys, and Power Steering Pump. Reposition the coolant recovery reservoir, inlet hose clamp at the crossover, coolant and detach the coolant recovery reservoir inlet hose from the crossover. Release the tension on the hose on the coolant crossover pipe with the hose clamp pliers (J 38185), then remove the radiator inlet hose and shift the thermal bypass hose clamp over in the crossover pipe before removing the thermal bypass hose. Next, remove the bolts of the coolant crossover pipe (1-4) and remove the coolant crossover pipe. For installation, you place an installation of the new coolant crossover pipe to the cylinder heads, you then secure the bolt that holds this pipe into place with the coolant crossover pipe bolts (1-4), make sure you tighten them to 50 n.m (37 lb ft). Attach the thermal bypass hose and its clamp and the radiator inlet hose. Use a small flat-bladed screwdriver to inset the hose clamp retention lock at the coolant crossover and then install the coolant recovery reservoir inlet hose and clamp it at the crossover. Finally, putting back, the Power Steering Pump, drive belt idler pulleys, generator and intake manifold cover.

Remove the air cleaner and duct assembly.

Use the Hose Clamp Pliers (J 38185) to reposition the hose clamp at the water pump housing, then disconnect the radiator outlet hose.

First, drain the cooling system.

Install the NEW coolant inlet pipe seal.

Hose Clamp Pliers (J 38185).

Place the new throttle body heater inlet hose and use the Hose Clamp Pliers (J 38185) to secure the hose clamps.