F 250 4WD Pickup V8-302 5.0L (1986)
position.
12.
Disconnect electrical connectors at the Engine Coolant Temperature sensor (ECT), engine temperature sending unit, Air Charge Temperature
sensor (ACT), and knock sensor.
13.
Disconnect fuel injector wiring harness from main harness assembly.
14.
Remove Exhaust Gas Oxygen sensor (EGO) ground wire from intake manifold stud. The plated stud and ground wire should be installed in the
same position as which it was removed.
15.
Disconnect fuel supply and return lines from fuel rails, then the upper radiator hose from thermostat housing.
16.
Remove water bypass hose, then the heater outlet hose at intake manifold.
17.
Remove three air cleaner bracket attaching nuts, then the air cleaner bracket.
18.
Remove coil bracket attaching nut and position bracket to one side.
19.
Remove lower intake manifold attaching studs and bolts, then the lower intake manifold assembly.
20.
Reverse procedure to install, noting the following:
a. Before installing lower intake manifold, apply {1/8} inch bead of silicone rubber sealer DAZ-19562-A or equivalent at mating surfaces of
intake manifold, cylinder heads and cylinder block, Fig. 18. Also apply a {1/16} inch bead of sealer to the outer end of intake manifold seal
for the full width of the seal.
b. Install new end seals on the cylinder block and new gaskets on the cylinder heads. Ensure gaskets interlock with seal tabs.
c. Torque lower intake manifold attaching bolts and studs to 23 - 25 ft. lbs. in the sequence shown in Fig. 19.
d. Torque upper intake manifold attaching bolts to 15 - 22 ft. lbs.