1966 Ford Comet, Falcon, Fairlane, Mustang Factory Shop Manual

• Ford Comet 2- and 4-door Sedan, Hardtop, Wagon, Villager Wagon, Convertible
• Ford Falcon 2- and 4-door Sedan, Bench, Coupe, Bucket, Wagon, Ranchero, RPO
• Ford Fairlane 2- and 4-door Sedan, Coupe, Club Coupe, Hardtop, Convertible, Ranch Wagon, Custom Ranch Wagon, Squire
• Ford Mustang 2-door Fastback, Hardtop, Convertible

• 200 cubic inch 6-cylinder
• 289 cubic inch V8
• 390 cubic inch V8
• 390 cubic inch V8 Hi-Perf.

• 3-Speed Manual
• Dual Range Automatic C6
• 4-Speed Manual
• Dual Range Automatic C4

CYLINDER FRONT COVER AND TIMING CHAIN

REMOVAL

1. Drain the cooling system and the crankcase.



2. Disconnect the radiator lower hose at the water pump.



3. Disconnect the heater hose at the water pump. Slide the water pump bypass hose clamp toward the water pump.



4. Loosen the alternator to cylinder head mounting bolt. Remove the alternator bracket bolts at the water pump and position the alternator and brackets out of the way. If the engine is equipped with a Thermactor exhaust emission control system, remove the air pump and brackets.



5. On a car with power steering and/or air conditioning, loosen the drive belt tension and remove the belt(s).



6. Remove the fan, spacer, pulley and drive belt.



7. Remove the crankshaft pulley from the crankshaft vibration damper. Remove the damper retaining screw and washer. Install the puller on the crankshaft vibration damper (Fig. 31) and remove the vibration damper.



8. Disconnect the fuel pump outlet line at the fuel pump. Remove the fuel pump retaining bolts and lay the pump to one side with the flexible fuel line still attached.



9. Remove the oil level dipstick.



10. Remove the oil pan to cylinder front cover retaining bolts. Remove the cylinder front cover and water pump as an assembly. If a new cylinder front cover is to be installed, remove the water pump and dipstick tube from the old cylinder front cover and install them on the new cover.



11. Discard the cylinder front cover gasket. Remove the crankshaft front oil slinger. 12. Check the timing chain deflection (refer to Part 8-1, Section 2).



12. Crank the engine until the timing marks on the sprockets are positioned as shown in Fig. 32.



13. Remove the camshaft sprocket cap screw, washers and fuel pump eccentric. Slide both sprockets and the timing chain forward, and remove them as an assembly (Fig 33.)



14. Remove the oil pan and oil pump pickup tube by following the procedure under Oil Pan Removal.

DESCRIPTION AND OPERATION

Refer to Wiring Diagram Manual, Form 7795P-66 for locations of wiring harnesses. Schematics are shown in Group 22 of this manual.

All of the instruments are electrically operated except the speedometer. Brightness of the instrument panel lights is controlled by a rheostat on the lighting switch.

GAUGES

The instrument cluster for the Falcon, Fairland and Mustang includes a fuel gauge, temperature gauge, charge indicator light, oil pressure indicator light, speedometer, high-beam indicator light, and a left and right-hand turn signal indicator light.

The instrument cluster for the Comets includes the same components except that an oil pressure indicator gauge and a charge indicator gauge are used instead of indicator lights. There are also separate left-hand and right-hand turn signal indicator lights in the instrument panel.

CONSTANT VOLTAGE REGULATOR

The constant voltage regulator (Fig. 1) used with the fuel, temperature, and oil gauges maintains an average value of 5.0 volts at the gauge terminals.

The regulator operates by means of a bimetallic arm and a heating coil. When the ignition switch is turned on, the heating coil (Fig. 1) heats the bimetallic arm causing it to bend and break the contacts, disconnecting the voltage supply from the heating coil.

The bimetallic arm then cools and brings the contacts together again. The making and breaking of the contacts, causes a pulsating voltage, with an effective average of 5.0 volts to be supplied to the gauges.

Although these pulsations are quite rapid, there is in each gauge a bimetallic arm which changes temperature quite slowly, and this assures steady average readings.

As the pulsating voltage would normally cause radio interference, a radio interference suppression choke is connected in series with the constant voltage regulator supply wire.

FUEL GAUGE

The fuel gauge consists of a sending unit, located on the gas tank, and a remote register unit (fuel gauge) mounted in the instrument cluster. The remote register unit pointer is controlled by a bimetallic arm and heating coil.

The sending unit is a rheostat that varies its resistance depending on the amount of fuel in the tank. The rheostat is operated by a float control. As the fuel level rises or falls the float control arm moved by the float, varies the resistance.

• Car Identification
• Brakes
• Suspension, Steering, Wheels, Tires
• Rear Axle
• Clutch, Driveline
• Manual Transmission
• Automatic Transmission
• Engine
• Ingition System
• Fuel System
• Charging System
• Starting System
• Lights, Wiring, Etc.
• Ventilating, Heating, Air Conditioning, Radio
• Body, Fits, Seats, Etc.
• Soft Trim, Convertible Top
• Maintenance Schedule
• Maintenance Operations
• Lubrication Charts