The Volvo 120, 130 Series, 1800 Sports Repair and Service Manual 1961-1973 by Haynes covers models indicated, including:

• Volvo 120 Series: 121, 122, 123 GT
• Volvo 130 Series: 131, 132, 133, Sedan and Wagon, (plus 221, 222, and 223) 1.8L and 2.0L
• Volvo P1800 Sports Coupe (including P1800S, P1800E, and P1800ES) 1.8L and 2.0L

Book Excerpt: 1961-1973 Volvo 120, 130, P1800 Repair Manual COOLING SYSTEM

THERMOSTAT | REMOVAL, TESTING AND REPLACEMENT

1. The action of the thermostat is shown in Figs. 2.2a and 2.2b. Note the definite change-over action - when the water is allowed to flow through the main hose which is connected from the top of the thermostat casing to the radiator, the circulation path to the water pump is closed up by the tongue on the bottom of the thermostat. For correct operation of the system, therefore, you should be careful not to bend or twist this tongue when removing or fitting the thermostat.
2. There are two types of thermostat, one marked 170 degrees and the other marked 82 degrees. As the Specification shows, their performance is not very different because the 82 degree type is marked in degrees centigrade. The two types are completely interchangeable.
3. To replace a faulty thermostat, lower the level of the coolant in the engine by draining it through the tap on the cylinder block until the tops of the cooling tubes are uncovered as viewed through the hole for the radiator filling cap. Collect the coolant in a clean container for using again. On models without an engine block tap it will be necessary to use the radiator drain plug to partially drain the cooling system.
4. Disconnect the upper radiator hose and unbolt the thermostat housing from the cylinder head. Extract the faulty thermostat, and then fit a new one in the identical position. Replace the gasket, replace the housing and hoses and refill the system through the expansion tank.
5. To check the performance of the thermostat, suspend it in a container of water which can be heated. As the water warms up, note the temperature at which the thermostat begins to open and also that at which the fully open position is reached. Compare these with the figures in the Specifications at the beginning of the Chapter.
6. Generally speaking, when the thermostat fails it remains shut. This leads to overheating, and if for any reason you are unable to replace the thermostat you should remove it and run the car without it. In this situation the engine takes a long time to reach its correct operating temperature, and while it is running cool it uses more gasoline. So do not regard this procedure as more than a temporary solution.

CLUTCH

CLUTCH MASTER CYLINDER | REMOVAL AND REPLACEMENT

1. Drain the hydraulic fluid from the clutch hydraulic system by attaching a length of suitable size plastic tubing to the bleed screw on the slave cylinder. Place the other end in a clean jar. Open the bleed screw, with an open-ended spanner, one complete turn and depress the clutch pedal. Tighten the bleed screw and allow the pedal to return. Repeat this procedure until the system has been drained.
2. Using a pair of pliers, extract the brake pedal to pushrod (thrust rod), clevis pin split pin and lift away the plain washer. Withdraw the clevis pin from the pushrod yoke. Should a nut and bolt be used instead of the clevis pin, these should be removed.
3. Undo the clutch pipe union nut from the master cylinder and carefully detach the pipe and move it to one side.
4. Undo and remove the two bolts securing the master cylinder to the bulkhead and lift away the master cylinder.
5. The master cylinder refitting procedure is the reverse to removal, but care must be taken when offering up to the bulkhead that the thrust rod is in line with the clutch pedal. Once connections have been made the hydraulic system must be bled, as described in Section 4.

Subject:1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973 Volvo 120, 130 Series, 1800 Sports service, maintenance, repair. ISBN-10: 0856962031 | ISBN-13: 9780856962035