Ranger 2WD V6-177 2.9L (1989)
Intake Manifold: Service and Repair
Lower
REMOVAL
1. Disconnect battery ground cable.
2. Remove air cleaner air intake duct from throttle body.
3. Disconnect throttle cable and bracket assembly.
4. Disconnect all vacuum hoses from fittings on upper intake manifold.
5. Disconnect electrical connections at throttle body, intake manifold upper and lower and distributor. Also disconnect fuel injector subharness from
main EEC harness.
6. Remove upper intake manifold (plenum) assembly.
7. Drain coolant. Disconnect and remove hose from water outlet to radiator and heater supply.
8. Remove distributor cap and spark plug wires as an assembly.
9. Observe and mark the location of the distributor rotor and housing so ignition timing can be maintained at reassembly. Remove distributor
hold-down screw and clamp and lift out distributor.
10. Remove rocker arm covers.
11. Remove intake manifold attaching bolts and nuts. Note length of manifold attaching bolts during removal so that they may be installed in their
original position. Tap manifold lightly with a plastic mallet to break gasket seal. Lift off manifold.
12. Remove all old gasket material and sealing compound.
INSTALLATION
1. Apply sealing compound to the joining surfaces. Place the intake manifold gasket in position. Ensure the tab on the RH bank cylinder head gasket
fits into the cutout of the manifold gasket.
2. Apply sealing compound to the attaching bolt bosses on the intake manifold and position the intake manifold. Follow the tightening sequence and
tighten the bolts. Refer to Specifications.
3. Install distributor so that rotor and housing are in the same position marked during removal.
4. Install distributor clamp and attaching bolt.
5. Replace rocker arm cover gaskets, and install rocker arm valve cover.
6. Install distributor cap. Coat the inside of each spark plug wire connector with silicone grease with a small screwdriver, and install the wires.
Connect distributor wiring harness.
7. Apply sealing compound, joining surfaces of upper and lower intake manifolds. Install upper intake manifold gaskets.
Intake Manifold Bolt Tightening Sequence
8. Install upper intake manifold (plenum) assembly.
9. Connect all vacuum hoses to fittings on upper intake manifold.
10. Connect electrical connections at throttle body, intake manifolds sub harness EEC main harness.
11. Install and adjust throttle linkage bracket assembly and cover.
12. Connect hoses from water outlet to radiator, and bypass hose from thermostat housing rear cover to intake manifold.
13. Connect battery ground cable.
14. Refill and bleed the cooling system.
15. Check ignition timing and re-set engine idle speed to specification.
16. Run engine at fast idle and check for coolant and oil leaks.