Removing
1. Remove the ground wire from the battery.
2. Relieve the pressure in the fuel system.
3. Remove the accelerator cable from the throttle guide arm. On models with automatic transmission, disconnect the pressure control cable from the throttle linkage. On models with vehicle speed control, remove the accelerator link from the throttle actuator assembly.
4. Remove the wiring harness and unscrew the wiring harness bracket from the intake manifold.
5. Unscrew the tube for the dipstick to measure the engine oil level.
6. Remove the air filter.
7. On all models except models with 6-cylinder DOHC engines, remove the cold start valve from the intake manifold.
8. Remove the fuel line and air flow sensor.
9. Remove the throttle body.
10. On SOHC 6-cylinder models with vehicle speed control, unscrew the throttle actuator along with the bracket from the intake manifold.
11. On models with 4-cylinder engines, mark and disconnect the hoses from the air flow distributor at idle speed.
12. Unscrew a connecting nut and disconnect from a collector a vacuum hose of the vacuum amplifier of brakes.
13. Label and disconnect the remaining electrical connectors and vacuum hoses from the intake manifold.
14. Unscrew and remove the intake manifold support brackets. Check that there is nothing else preventing the removal of the intake manifold.
15. Remove the nuts and bolts and remove the intake manifold from the cylinder head. Remove the intake manifold gasket.
16. If necessary, unscrew the bolts and separate the upper and lower parts of the intake manifold. A new gasket must be used when assembling the upper and lower parts of the intake manifold.
17. Being careful and using a plastic or wooden scraper, clean the mating surfaces of the cylinder head and intake manifold.
Installation
1. Installation is carried out in the reverse order of removal, taking into account the following points.
2. Check that the mating surfaces of the intake manifold and cylinder head are free of old gaskets.
3. Adjust the accelerator cable.
4. On models with automatic transmission, adjust the pressure control cable.
5. Check and, if necessary, adjust the idle speed.