Remove and Refit
REMOVE1. Disconnect the battery negative terminal.
2. Release the radiator bottom hose and partially drain the cooling system, reconnect the hose to the radiator.
3. Release the two large hose clamps from the neck of the plenum chamber and outlet bore of the airflow sensor and remove the hose from its location.
4. Release the clamps and remove the two coolant hoses from the bottom of the plenum chamber inlet neck. Identify each hose to aid re-assembly.
5. Remove the vacuum supply hose from the cruise control actuator.
6. Disconnect the actuating link at the cruise control actuator.
7. Remove the distributor vacuum hose, positive crankcase ventilation breather filter hose and servo hose.
8. Disconnect the throttle potentiometer multi-plug.
9. Disconnect the multi-plug from the air by-pass valve.
10. Disconnect the small vacuum hose at the rear of the plenum chamber, located below the air by-pass valve.
11. Remove the hose from the air by-pass valve to plenum chamber to enable the small return spring located below the throttle levers to be unhooked.
12. Release the two throttle return springs.
13. Remove the two bolts (with spring washers) securing the throttle cable and kick-down cable anchor bracket to the throttle lever support bracket, lay the assembly to one side.
14. Remove the six socket head bolts (with plain washers) securing the plenum chamber to the ram housing.
15. Maneuver the plenum chamber and remove it from the ram housing.
NOTE: To prevent ingress of dirt into the ram tubes, place a protective cover over the ram tube openings.
REFIT
1. Ensure that all mating faces are free from any previous sealing compounds.
2. Coat the mating faces of the plenum chamber and ram housing with Hylomar sealant, or equivalent.
3. Refit the plenum chamber and tighten the six bolts to 22 - 28 Nm (16 - 21 ft lb)
4. When refitting the small return spring, item 12 in the removal procedure, it must be noted that the hooked open end of the spring MUST face the plenum chamber as shown.
5. Reverse the remaining removal instructions.
NOTE: Be sure that all hoses are connected securely to prevent un-metered air entering the engine.