Ford Mustang, Mercury Cougar Repair & Service Manual 1964-1973

• 170 cid 6-cylinder
• 200 cid 6-cylinder
• 250 cid 6-cylinder
• 260 cid V8
• 289 cid V8
• 302 cid V8
• 351 cid V8
• 390 cid V8
• 427 cid V8
• 428 cid V8
• 429 cid BOSS V8

• 3-speed manual
• 4-speed manual
• 4-speed manual close-ratio
• C4 automatic
• FMX automatic
• C6 automatic

1. Scribe the hood hinge outline on the underhood, disconnect the hood, and remove it.
   
   
2. Drain the entire cooling system and crankcase. Remove the evaporative emissions and EGR system lines.
   
   
3. Remove the air cleaner and disconnect the battery at the cylinder head. On cars with automatic transmissions, disconnect the oil cooler lines at the radiator.
   
   
4. Remove the upper and lower radiator hoses and the radiator. If the car is equipped with air conditioning, unbolt the compressor and position the compressor out of the way with the refrigerant lines intact. Unbolt and lay the refrigerant radiator forward without disconnecting the refrigerant lines. On some 428 CJ engines and all 429 Super CJ, Boss 302, and Boss 429 engines, disconnect the inlet and outlet lines from the engine oil cooler, remove the hold-down bracket, and remove the cooler.
   
   
5. Remove the fan, fan belt, and upper pulley.
   
   
6. Disconnect the heater hoses at the water pump and the carburetor spacer.
   
   
7. Disconnect the generator wires at the generator, the starter cable at the starter, the accelerator rod at the carburetor, and, on the six-cylinder engine, the choke control cable at the carburetor.
   
   
8. Disconnect the fuel tank line at the fuel pump and plug the line.
   
   
9. Disconnect the coil primary wire at the coil. Disconnect the wires at the oil pressure and water temperature sending units.
   
   
10. Remove the starter and dust seal.
    
    
11. On a car equipped with a manual transmission, remove the clutch retracting spring. Disconnect the clutch equalizer shaft and arm bracket at the underbody rail and remove the arm bracket and equalizer shaft.
    
    
12. Raise the car. Remove the flywheel or converter housing upper retaining bolts through the access holes in the floor pan.
    
    
13. Disconnect the exhaust pipe or pipes at the exhaust manifold. Disconnect the right and left motor mounts at the underbody bracket. Remove the flywheel or converter housing cover.
    
    
14. On a car with manual shift, remove the flywheel housing lower retaining bolts.
    
    
15. On a car with automotive transmission, disconnect the throttle valve vacuum line at the intake manifold and the converter from the flywheel. Remove the converter housing lower retaining bolts. On a car with power steering, disconnect the power steering pump from the cylinder head. Move the drive belt and wire the steering pump out of the way.
    
    
16. Lower the car. Support the transmission and flywheel or converter housing with a jack.
    
    
17. Attach an engine lifting hook. Lift the engine up and out of the compartment and onto an adequate workstand.

Because of the way an internal combustion engine breathes, it can produce torque (or twisting force) only within a narrow speed range. Most overhead valve pushrod engines must turn about 2500 rpm to produce their peak torque. Often by 4500 rpm, they are producing so little torque that continued increases in engine speed produce no power increases.

The torque peak on overhead camshaft engines is, generally, much higher, but much narrower.

The manual transmission and clutch are employed to vary the relationship between engine RPM and the speed of the wheels so that adequate power can be produced under all circumstances. The clutch allows engine torque to be applied to the transmission input shaft gradually, due to mechanical slippage. The vehicle can, consequently, be started smoothly from a full stop.

The transmission changes the ratio between the rotating speeds of the engine and the wheels by the use of gears. 4-speed or 5-speed transmissions are most common. The lower gears allow full engine power to be applied to the rear wheels during acceleration at low speeds.

The clutch driveplate is a thin disc, the center of which is splined to the transmission input shaft. Both sides of the disc are covered with a layer of material which is similar to brake lining and which is capable of allowing slippage without roughness or excessive noise.

• Tune-up and routine maintenance
• Engine and overhaul procedures
• Cooling, heating and air-conditioning systems
• Fuel and exhaust systems
• Engine electrical systems
• Emissions control systems
• Transmission
• Brakes
• Suspension and steering systems
• Body
• Chassis electrical system
• Wiring diagrams