Intake Air Heater: Service and Repair
REMOVALIf servicing either of the heater elements, the entire block/element assembly must be replaced.
1. Disconnect both negative battery cables at both batteries. Cover and isolate ends of both cables.
Fig.27 Intake Tube And Connecting Hose:
2. Remove both the intake manifold air intake tube (above injection pump), and its rubber connector hose (Fig. 27).
Fig.28 Air Heater Manifold:
Fig.29 Air Heater Elements:
3. Lift 2 rubber covers (Fig. 28) to gain access to 2 positive (+) cable nuts. Remove these 2 nuts (Fig. 29) and remove 2 cables from studs.
4. Disconnect ground strap (Fig. 28) at heater element stud.
5. Remove wiring harness clips.
6. Remove engine oil dipstick tube bracket from air inlet connection and fuel filter housing.
7. Remove 4 housing mounting bolts (Fig. 28) and remove heater element assembly.
INSTALLATION
If servicing either of the heater elements, the entire block/element assembly must be replaced.
1. Using 2 new gaskets, position element assembly and air housing to intake manifold.
2. Position ground cable to air housing.
3. Install 4 housing bolts and tighten to 24 Nm (18 ft.lbs.) torque.
4. Connect 2 positive (+) heater cables at cable mounting studs. Do not allow either of the cable eyelets to contact any other metal source other than the cable nuts/studs.
5. Install engine oil dipstick tube and mounting bolt.
6. Connect rubber connector hose and intake tube to air intake housing.
7. Connect both negative battery cables at both batteries.