Intake Manifold: Service and Repair

Fig. 19 Intake manifold tightening sequence. V6-232:

V6-232
1. Drain cooling system, then remove air cleaner with air intake duct and heat tube.
2. Disconnect accelerator cable and transmission linkage (if equipped) from carburetor.
3. Remove accelerator cable mounting bracket attaching bolts and position bracket aside.
4. On models equipped with speed control, disconnect chain from carburetor, then remove servo bracket assembly attaching nuts and position assembly aside.
5. On all models, disconnect bowl vent hose from carburetor.
6. Disconnect Thermactor air supply hose from check valve located on back of intake manifold.
7. Disconnect fuel inlet line from carburetor.
8. Disconnect upper radiator hose from thermostat housing and the coolant bypass hose from manifold.
9. Disconnect heater tube from intake manifold and remove tube support bracket attaching nut.
10. Disconnect all vacuum lines and electrical connectors necessary for intake manifold removal.
11. On models equipped with A/C, remove A/C compressor support bracket from intake manifold.
12. On 1982 models, loosen EGR tube at EGR valve adapter.
13. On 1983 models, remove EGR tube.
14. On all models, disconnect PCV line from carburetor.
15. Remove carburetor and discard gasket.
16. On 1982 models, remove carburetor hold-down studs from manifold.
17. On all models, remove 3 EGR spacer attaching screws from manifold.
18. Work EGR spacer loose from manifold with EGR adapter and valve attached, then remove spacer and discard gasket. On 1982 models, disconnect EGR tube from adapter prior to removing spacer.
19. Remove PCV line, then the intake manifold attaching bolts and intake manifold. It may be necessary to pry on front of manifold to break seal. If so, use care to prevent damage to machined surfaces.
20. Reverse procedure to install. Apply sealer to gasket areas, then torque manifold attaching bolts to specifications in sequence shown in Fig. 19.