1987 MAZDA 626 water pump

COOLING SYSTEM
(GASOLINE ENGINE)
OUTLINE 3A— 2
COOLANT FLOW CHART (DOHC) 3A— 2
COOLANT FLOW CHART (SOHC) 3A— 3
SPECIFICATIONS 3A- 4
TROUBLESHOOTING GUIDE 3A— 4
COOLANT 3A- 5
INSPECTION 3A— 5
REPLACEMENT 3A— 5
RADIATOR CAP 3A— 6
INSPECTION 3A— 6
RADIATOR 3A— 7
REMOVAL AND INSTALLATION 3A— 7
INSPECTION 3A— 7
WATER PUMP 3A— 8
REMOVAL 3A— 8
INSPECTION 3A—10
INSTALLATION 3A—10
THERMOSTAT 3A—11
REMOVAL 3A—11
INSPECTION 3A-11
INSTALLATION 3A—11
COOLING FAN 3A—12
SYSTEM CIRCUIT 3A—12
CIRCUIT INSPECTION 3A—12
FAN MOTOR 3A—13
WATER THERMO SWITCH 3A—14
76G03A-001

3A OUTLINE
OUTLINE
COOLANT FLOW CHART (DOHC)
ISC solenoid valve 2-stage thermostat
From jo heater heater Main*™, valve ^--^Sub valve
76G03A-002
1. Water pump
2. Thermostat
3. Radiator
4. Coolant reservoir
5. Oil cooler
6. Cooling fan
3A—2

OUTLINE 3A
COOLANT FLOW CHART (SOHC)
76G03A-015
1. Water pump 4. Coolant reservoir
2. Thermostat 5. Oil cooler (8-valve...only ECE, 12-valve)
3. Radiator 6. Cooling fan
3A—3

3A TROUBLESHOOTING GUIDE i
SPECIFICATIONS
^Engine model
Item ^__
FE-DOHC
FE 8-valve,
F8, F6...except
Middle East
.General
FE 12-valve
FE 8-valve F8, F6...only Middle East General

Cooling system Water cooled, forced circulation
Coolant capacity liters (US qt, Imp qt)
With heater 7.5 (7.9, 6.6) Coolant capacity liters (US qt, Imp qt) Without heater 7.0 (7.4, 6.2)
Water pump Type Centrifugal, timing belt driven Water pump
Water seal Unified seal
Thermostat
Type Wax, 2-stage Wax
Thermostat
Opening temperature °C(°F) Sub
.
83.5-86.5 (182-188) Main: 86.5-89.5 (188-193) 86.5-89.5 (188-193) 80.5-83.5 (177-182) Thermostat
Full-open temperature °C(°F) 100 (212) 95 (203)
Thermostat
Full-open lift
mm
(in) Sub: 1.5 (0.06) min.
Main: 8.0 (0.31) min. 8.5 (0.33) min.
Radiator
Type Corrugated
Radiator Cap valve opening pressure
kPa (kg/cm2, psi) 74-103 (0.75-1.05, 11-15)
Cooling
fan

Capacity
W

MTX 80
Cooling
fan

Capacity
W
ATX 120
Cooling
fan
Number
of
blade 4 Cooling
fan

Outer diameter
of
blade
mm
(in) MTX 320 (12.6)
Cooling
fan

Outer diameter
of
blade
mm
(in)
ATX 340 (13.4)

76G03A-003
TROUBLESHOOTING GUIDE
Problem Possible Cause Remedy Page
Overheating
Insufficient coolant Add 3A—
5

Coolant leakage Repair
—

Radiator fins clogged Clean 3A—
7

Radiator cap malfunction Replace 3A-
6

Cooling fan malfunction Repair 3A-12 Thermostat malfunction Replace 3 A-11
Water passage clogged Clean 3A—
5

Water
DumD
malfunction ReDair
or
replace 3A-
8
Corrosion
Impurities
in
coolant Replace 3A-
5
76G03A-004
3A—4

3A WATER PUMP
WATER PUMP
REMOVAL
1. Disconnect the negative battery cable.
2. Turn the crankshaft so that the No. 1 cylinder is at TDC of compression.
3. Drain the engine coolant.
4. Remove in the sequence shown in the figure.
1. Timing belt (Refer to Section 1B) 4. Idler pulley
2. Camshaft pulley (Refer to Section 1B) 5. Water pump
3. Seal plate 6. O-ring
3A—8

WATER PUMP 3A
SOHC
19—25 N m (1.9—2.6 m-kg, 14—19 ft-lb)
37—52 N m (3.8—5.3 m-kg, 27—38 ft-lb)
1. Timing belt (Refer to Section 1A)
2. Idler pulley
3. Water pump
4. O-ring
76G03A-007
3A-9

3A WATER PUMP
INSPECTION
Check the following. Replace the pump if necessary.
1. Cracks or damage
2. Abnormal noise, bearing sticking or loose.
86U03X-014
INSTALLATION
Install in the reverse order of removal referring to the
installation note.
Installation Note
Rubber seal
Install the rubber seals on the water pump.
76G03A-017
86U03X-016
Water pump
1. Remove any gasket fragments, dirt, or oil from the
contact surfaces.
2. Install a new O-ring on the water pump.
3. Install the water pump.
Tightening torque:
19—25 Nm (1.9—2.6 m-kg, 14—19 ft-lb)
Note
To prevent dropping the O-ring when install-
ing, put silicon sealant in the O-ring groove
(shaded areas) as shown. Do not apply it to
the contact surfaces.
3A—10

3B
COOLING SYSTEM
(DIESEL)
OUTLINE 3B— 2
COOLANT FLOW CHART 3B— 2
SPECIFICATIONS 3B— 3
TROUBLESHOOTING GUIDE 3B— 3
COOLANT 3B— 4
INSPECTION 3B— 4
REPLACEMENT 3B— 4
RADIATOR CAP 3B— 5
INSPECTION 3B— 5
RADIATOR 3B— 6
REMOVAL AND INSTALLATION 3B— 6
INSPECTION 3B— 6
WATER PUMP 3B— 7
REMOVAL 3B— 7
INSPECTION 3B— 8
INSTALLATION 3B— 8
THERMOSTAT 3B— 9
REMOVAL 3B— 9
INSPECTION 3B— 9
INSTALLATION 3B— 9
COOLING FAN 3B—10
SYSTEM CIRCUIT 3B—10
CIRCUIT INSPECTION 3B—10
FAN MOTOR 3B—11
WATER THERMO SWITCH 3B—12
76G03B-001