Ford, Mercury Full-Size Car Repair and Service Manual 1968-1988 by Chilton

• Ford Country Sedan
• Ford Country Squire
• Ford Crown Victoria
• Ford Custom
• Ford Custom 500
• Ford Galaxie 500
• Ford LTD, 1968-1982
• Ford Ranch Wagon



• Mercury Colony Park
• Mercury Commuter
• Mercury Marquis, 1968-1982
• Mercury Grand Marquis
• Mercury Monterey
• Mercury Park Lane

1. Remove the air cleaner and heat chamber air inlet hose, if equipped.



2. Remove the automatic choke tube, if equipped, and the fresh air tube from the valve cover.



3. Remove the Thermactor bypass valve and air supply hoses, as needed.



4. Disconnect and mark the spark plug wires. Remove the wire bracket if necessary.



5. Remove any other components if additional access is required. Remove the valve cover retaining bolts and the valve cover.



6. Installation is the reverse of removal. Tighten the retaining bolts to 6-9 ft.lbs. (8-12 Nm).


NOTE: Always use new gasket(s) when installing the valve covers. Install the gasket(s) according to the manufacturer instructions.

NOTE: When disconnecting wires and vacuum lines, label them for reinstallation identification.

1. Remove the air cleaner assembly, except if equipped with Multi-Port Fuel Injection (MPFI).



2. If equipped with MPFI, remove the upper intake manifold assembly.



3. On the right side:



1. Disconnect the automatic choke heat chamber hose from the inlet tube near the right valve cover.



2. Remove the automatic choke heat tube if equipped and remove the PCV valve and hoses.



3. Remove the Thermactor bypass valve and air supply hoses as necessary to gain clearance.



4. Disconnect the spark plug wires from the plugs. Twist then pull on the boots only, never on the wire. Position the wires and mounting bracket out of the way.



5. Remove the valve cover mounting bolts, and then the valve cover. A plastic-faced hammer may be needed to loosen the cover from the gasket.


4. On the left side:



1. Remove the spark plug wires and bracket.



2. Remove the wiring harness and any vacuum hose(s) form the bracket.



3. Remove the valve cover mounting bolts and valve cover. A plastic faced hammer may be needed to loosen the cover from the gasket.


5. Clean all old gasket material from the valve cover and cylinder head mounting surfaces.



6. Installation is the reverse of removal procedure. Tighten all retaining bolts to 10-13 ft.lbs. (14-18 Nm).
   
   Use oil resistant sealing compound and a new valve cover gasket. Follow the gasket manufacturer instruction when installing the gasket.
   
   When positioning the valve cover gasket, make sure all the gasket tangs are engaged into the cover notches provided.

• 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