Coolant Air Bleed Pipe Assembly Replacement
Coolant Air Bleed Pipe Assembly Replacement (RPO LS4)
Removal Procedure
Important: Removal of the intake manifold is NOT required to service the coolant air bleed pipe, but is required to service the coolant air bleed pipe covers and/or gaskets.
1. Drain the cooling system. Refer to Draining and Filling Cooling System (9C1, 9C3 Static Fill) Draining and Filling Cooling System (LS4 GE 47716 Fill) Draining and Filling Cooling System (LS4 Static Fill) Draining and Filling Cooling System (LZE, LZ4, LZ8, 9C1, 9C3, GE47716 Fill) Draining and Filling Cooling System (LZE, LZ4, LZ8 Static Fill).
2. Remove the intake manifold.
3. Disconnect the hose clamp and hose from the coolant fill neck.
4. Remove the coolant air bleed pipe bolts (309).
5. Remove the coolant air bleed pipe (307) with hose and seals (308).
6. Remove the hose (311) and clamps (322) from the coolant air bleed pipe (307) as required.
7. Remove the engine coolant air bleed cover bolts (312).
8. Remove the covers (313) with seals (308).
9. Remove the seals (308) from the pipe and covers. Discard the seals.
Installation Procedure
Important: Position the O-ring seal onto the nipple portion of the pipe.
1. Install NEW seals (308) onto the engine coolant air bleed pipe and covers.
2. Install the covers (313) with seals (308).
Notice: Refer to Fastener Notice.
3. Install the engine coolant air bleed cover bolts (312).
Tighten the bolts to 12 N.m (106 lb in).
4. Install the hose (311) and clamps (322) to the coolant air bleed pipe (307) as required.
5. Install the coolant air bleed pipe (307) with hose and seals (308).
6. Install the coolant air bleed pipe bolts (309).
Tighten the bolts to 12 N.m (106 lb in).
7. Install the intake manifold.
8. Connect the clamp and hose to coolant fill neck.
9. Fill the cooling system. Refer to Draining and Filling Cooling System (9C1, 9C3 Static Fill) Draining and Filling Cooling System (LS4 GE 47716 Fill) Draining and Filling Cooling System (LS4 Static Fill) Draining and Filling Cooling System (LZE, LZ4, LZ8, 9C1, 9C3, GE47716 Fill) Draining and Filling Cooling System (LZE, LZ4, LZ8 Static Fill).