Intake Air Heater: Service and Repair

INTAKE AIR HEATER (IAH) REPLACEMENT

REMOVAL PROCEDURE




1. Remove the air cleaner outlet duct.
2. Loosen the charged air cooler outlet duct to intake hose clamp.
3. Remove the charged air cooler outlet duct from the intake.

IMPORTANT: Do not use a screwdriver or other tool to pry the hose loose. The hose can be torn or damaged. Loosen the hose by twisting.




4. Remove the electrical harness bolts.
5. Reposition the harness clip from the intake manifold tube, as needed.




6. Remove the air inlet tube to intake manifold tube bolt and nut.




7. Disconnect the intake air heater electrical connector.
8. Disconnect the manifold absolute pressure (MAP) sensor electrical connector.
9. Remove the engine harness clip from the air inlet tube.
10. Remove the air inlet tube nuts.
11. Remove the air inlet tube.




12. Remove the intake air heater bolts.
13. Separate the air inlet tube from the intake air heater.

INSTALLATION PROCEDURE




1. Install the air inlet tubes to the intake air heater.
2. Install the intake air heater bolts.

NOTE: Refer to Fastener Notice.

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




3. Install the air inlet tube and NEW gaskets.
4. Install the air inlet tube nuts.

Tighten the nuts to 25 N.m (18 lb ft).

5. Connect the intake air heater electrical connector.
6. Connect the MAP sensor electrical connector.
7. Install the engine harness clip to the air inlet tube.




8. Install the air inlet tube to intake manifold tube bolt and nut.

Tighten the bolt/nut to 10 N.m (89 lb in).




9. Install the electrical harness bolts.

Tighten the bolts to 4 N.m (35 lb in).




10. Install the charged air cooler outlet duct to the intake.

IMPORTANT: Lubricate the end of the duct prior to installation.

11. Tighten the charged air cooler outlet duct to intake hose clamp.

Tighten the clamp to 6 N.m (53 lb in).

12. Install the air cleaner outlet duct.