Removal Procedure
- Drain the engine coolant.
Refer to
Cooling System Draining and Filling
in Engine Cooling.
- Remove the hose clamps from the outlet pipe (6) and from the inlet
pipe (5).
- Remove the heater inlet pipe (5) and the outlet pipe (6) from
the bypass valves (4).
- Remove the bolts (3) that retain the valves to the heater assembly.
- Remove the bypass valves (4) from the heater assembly.
Installation Procedure
- Install the bypass valves
(4) to the heater assembly.
Notice: Use the correct fastener in the correct location. Replacement fasteners
must be the correct part number for that application. Fasteners requiring
replacement or fasteners requiring the use of thread locking compound or sealant
are identified in the service procedure. Do not use paints, lubricants, or
corrosion inhibitors on fasteners or fastener joint surfaces unless specified.
These coatings affect fastener torque and joint clamping force and may damage
the fastener. Use the correct tightening sequence and specifications when
installing fasteners in order to avoid damage to parts and systems.
- Install the bolts
that retain the valves (4) to the heater assembly.
Tighten
Tighten the bolts to 4 N·m (35 lb in).
- Install the heater inlet pipe (5) and the outlet pipe (6) to the
bypass valves.
- Install the hose clamps.
- Fill the cooling system. Refer to
Cooling System Draining and Filling
in
Engine Cooling.
- Ensure that no leaks exist in the cooling system.