F 250 2WD Pickup V8-351 5.8L VIN H 4-bbl HP (1985)
Intake Manifold: Service and Repair
Removal
1. Drain the cooling system. Remove the air cleaner and intake duct assembly, including the crankcase ventilation hose.
2. Disconnect the accelerator cable and speed control linkage (if so equipped) from the carburetor. Remove the accelerator cable bracket. Disconnect
the automatic transmission kickdown rod at the carburetor (if so equipped). Disconnect the electric choke and carburetor solenoid wires, if so
equipped.
3. Disconnect the high-tension lead and wires from the coil
4. Disconnect the spark plug wires from the spark plugs by grasping, twisting and pulling the moulded cap. Remove the wires and bracket assembly
from the rocker arm cover attaching stud. Remove the distributor cap and spark plug wires as an assembly.
5. Remove the carburetor fuel inlet line. Push-connect fittings.
6. Disconnect the distributor vacuum hoses from the distributor if so equipped or Electronic Engine Control (EEC) distributor connection. Remove
the distributor hold down bolt and remove the distributor. Disconnect evaporative hoses.
7. Disconnect the radiator upper hose from the coolant outlet housing, and the water temperature sending unit wire at the sending unit. Remove the
heater hose from the intake manifold.
8. Loosen the clamp on the water pump by-pass hose at the coolant outlet housing and slide the hose off the outlet housing.
9. Disconnect the crankcase vent hose at the valve rocker arm cover.
10. Remove the intake manifold and carburetor as an assembly. It may be necessary to pry the intake manifold away from the cylinder heads. Remove
the intake manifold gaskets and seals. Discard the intake manifold attaching bolt sealing washers.
11. If the manifold assembly is to be disassembled, identify all vacuum hoses before disconnecting them. Remove the coolant outlet housing gasket
and thermostat. Remove the ignition coil, temperature sending unit, carburetor, spacer, (on EEC engines remove Exhaust Gas Recirculation
(EGR) cooler and related parts) gasket, vacuum fitting, accelerator retracting spring bracket and choke cable bracket.
Installation
1. If the intake manifold assembly was disassembled, install the temperature sending unit (threads coated with electrical conductive sealer), ignition
coil, carburetor, spacer, (on EEC engine install EGR cooler and related parts) gaskets, vacuum fitting, accelerator retracting spring bracket and
choke cable bracket. Position the thermostat in the coolant outlet housing. Coat the new thermostat gasket with water-resistant sealer such as Ford
Perfect Seal or equivalent, and position it on the coolant outlet housing. Install the coolant outlet housing. Tighten to 13-16 N-m (9-12 ft-lbs).
Connect all vacuum hoses.