Intake Air Heater: Service and Repair

Intake Air Heater Replacement

Removal Procedure




1. Disconnect the negative battery cable.
2. Remove the charge air cooler outlet pipe.
3. Disconnect the engine wiring harness electrical connector (1) from the intake air heater (IAH).
4. Disconnect the engine wiring harness electrical connector (2) from the intake air valve.
5. Remove the nut and the positive battery cable from the IAH.




6. Remove the intake air valve bolts and valve.




7. Remove the IAH and remove and discard the IAH gasket.

Installation Procedure




1. Position a NEW IAH gasket to the intake manifold tube and position the IAH to the intake manifold tube.






Notice: Refer to Fastener Notice.

2. Position the intake air valve to the IAH and install the intake air valve bolts.

Tighten the bolts to 20 N.m (15 lb ft).




3. Install the positive battery cable and nut to the IAH.

Tighten the nut to 4 N.m (34 lb in).

4. Connect the engine wiring harness electrical connector (2) to the intake air valve.
5. Connect the engine wiring harness electrical connector (1) from the intake air heater (IAH).
6. Install the charge air cooler outlet pipe.
7. Connect the negative battery cable.