Intake Air Heater: Service and Repair
INTAKE AIR HEATER (IAH) REPLACEMENTREMOVAL PROCEDURE
1. Loosen the outlet duct clamp at the upper intake manifold cover.
2. Remove the upper intake manifold cover from the outlet duct.
3. Remove the upper intake manifold cover.
4. Remove the intake air heater (IAH) nut.
5. Remove the IAH wire.
6. Remove the IAH.
INSTALLATION PROCEDURE
NOTE: Refer to Fastener Notice in Service Precautions.
1. Install the IAH.
Tighten
Tighten the IAH to 50 N.m (37 lb ft).
2. Install the IAH wire.
3. Install the IAH nut.
Tighten
Tighten the nut to 5 N.m (44 lb in).
4. Install the upper intake manifold cover.
5. Install the upper intake manifold cover to the outlet duct.
6. Tighten the outlet duct clamp at the upper intake manifold cover.
Tighten
Tighten the clamp to 6 N.m (53 lb in).