1987 MAZDA 626 torque

THERMOSTAT 3B
THERMOSTAT
REMOVAL
1. Drain the engine coolant.
2. Disconnect the upper radiator hose, and water
thermo switch connector.
3. Remove the thermostat cover.
4. Remove the thermostat.
76G03B-010
76G03B-011
Sub valve Main valve
I
INSPECTION
Check the thermostat. Replace if necessary.
1. Visually check that the valve is airtight.
2. Place the thermostat and a thermometer in water.
3. Gradually heat the water and check the following:
Valve opening temperature
Sub valve : 78.5—81.5°C (173—179°F)
Main valve : 86.5—89.5°C (188—193°F)
Full open lift
Sub valve : 1.5 mm (0.06 in) min. at
100°C (212°F)
Main valve : 8 mm (0.31 in) min. at
100°C (212°F)
Valve closing temperature
Sub valve : 75°C (167°F)
Main valve : 83°C
(181
°F)
69G03B-012
76G03B-012
INSTALLATION
1. Install the thermostat into the thermostat case with
jiggle pin at the top.
2. Install a new gasket with the seal print side facing
the thermostat case.
3. Install the thermostat cover.
Tightening torque:
7—10 N-m (70—100 cm-kg, 61—87 in-lb)
4. Install the upper radiator hose and water thermo
switch connector.
5. Replenish the coolant.
6. Start the engine and check for leaks.
3B-9

3B COOLING FAN
WATER THERMO SWITCH
1. Remove the cooling fan water thermo switch.
Note
Make sure that the ignition switch is OFF. If
not, the fan will operate when the connector
is removed.
76G03B-017
76G03B-018
2. Place the water thermo switch in water.
3. Heat the water gradually, and check for continui-
ty of the switch with an ohmmeter. Replace if
necessary.
Temperature Continuity
Above
91
°C (208°F) No
Below 84°C (183°F) Yes
4. Install the water thermo switch and a new O-ring.
Tightening torque:
6—9 N-m (60—90 cm-kg, 52—78 in-lb)
Caution
Do not use sealing tape.
3B-12

4A FUEL SYSTEM
FUEL TANK
Removal
1. Remove the rear seat cushion.
2. Remove the cover and disconnect the fuel tank
gauge unit connector.
3. Disconnect the fuel main and return hoses.
4. Raise the vehicle and support it with safety stands.
5. Remove the fuel level gauge unit assembly.
Warning
a) When repairing the fuel tank, clean it
thoroughly with steam to remove all explo-
sive gasoline and fumes.
b) Use of fire is strictly prohibited while work-
ing on the fuel tank.
6. Drain the fuel.
7. Disconnect the remaining hoses.
8. Remove the fuel tank.
Inspection
1. Check the fuel tank for cracks and corrosion.
2. If any defect is found, repair or replace the tank.
3. Check for leaks.
Torque Specifications
76G04A-054
4A—36
ft
—^tjf 5
/vfC(l

I
\ 1c
r 1 / |J
tl/y#
t

^ fcfVii
76G04A-052
76G04A-053
Installation
Install in the reverse order of removal.

4A EXHAUST SYSTEM
EXHAUST SYSTEM
EXCEPT FE 8VALVE—UNLEADED FUEL
Removal and Installation
1. Remove in the sequence shown in the figure.
2. Install in the reverse order of removal.
Torque specifications
1. Center silencer and main silencer
2. Brackets
76G04A-187
3. Front silencers
4. Exhaust manifolds
Inspection
Visually check the exhaust system for cracks or
damage.
4A—96

EXHAUST SYSTEM 4A
FE 8 VALVE-UNLEADED FUEL
Removal and Inspection
1. Remove in the sequence shown in the figure
2. Install in the reverse order of removal.
Torque Specifications

L

22—28 N-m (2.2—2.9 m-kg, 16—21 ft-lb)
34—49 N-m (3.5—5.0 m-kg, 26—36 ft-lb)
55—60 N-m (5.6—8.2 m-kg, 40—59 ft-lb)
.8—11 Nm .8—1.1 m-kg, 69—95 in-lb)
N-m 3 m-kg, 25—38 ft-lb)
76G04A-189
1. Main silencer
2. Middle pipe
3. Pre-silencer
4. Catalytic converter
5. Bracket
6. Front pipe
Inspection
1. Check the catalytic converter and exhaust pipe for
deterioration or restriction.
2. Check the insulation covers welded onto the cata-
lytic converter for damage.
Note
If the insulation cover is touching the catalytic
converter housing, excessive heat at the floor
will occur.
76G04A-190
4A-97

4B INTAKE AIR SYSTEM
INSTALLATION
install in the reverse order of removal.
Torque Specification
8—11 N-m (0.8—1.1 m-kg, 5.8—8.0 ft-lb)
19—25 N m (1.9—2.6 m-kg, 14—19 ft-lb)
19—25 N m (1.9—2.6 m-kg, 14—19 ft-lb)
8—11 Nm (0.8—1.1 m-kg, 5.8—8.0 ft-lb)
8—11 N-m (0.8—1.1 m-kg, 5.8—8.0 tt-lb)
a® ^£-5—7 N-m ;'(0.5—0.7 m-kg, 13.6—5.1 ft-lb)
8—11 Nm (0.8—1.1 m-kg 5.6—8.0 ft-lb)
19—25 N-m '41.9—2.6 m-kg, tf>14—19 ft-lb)
8—11 N-m (0.8—1.1 m-kg, 5.8—8.0 ft-lb)
8—11 N-m (0.8—1.1 m-kg 5.8—8.0 ft-lb)
4B—34
76G04B-125

4B FUEL SYSTEM
76G04B-078
76G04B-079
Insulator
Injector
Grommet
Delivery
pipe
Pressure regulator
76G04B-080
Injector O-ring Correct
1 #J
Grommet Delivery pipe
Wrong
£a
/
^ Wrong IF
Injector
1. Disconnect the air pipe from the throttle body.
2. Disconnect the air hose from the throttle body.
3. Disconnect the delivery pipe from the intake
manifold.
4. Lift the delivery pipe along with the pressure regu-
lator and pulsation damper.
5. Remove the grommets, injectors, and insulators.
6. Install in the reverse order of removal, referring to
installation note.
Tightening torque:
Delivery pipe 19—25 N-m
(1.9—2.6 m-kg, 14—19 ft-lb)
Installation note
Injector
1. Use new O-rings.
2. Apply a small amount of engine oil to the O-rings
when installing.
86U04A-108
4B-58

FUEL SYSTEM 4B
3. Install the injectors and the injector insulators.
86U04A-109
Delivery Pipe
1. Remove the pulsation damper and pressure regu-
lator from the delivery pipe.
2. Remove the injectors (Refer to page 4B—58).
76G04B-081
Replace the delivery pipe.
Install in the reverse order of removal, referring to
installation note.
Tightening torque:
Pressure regulator
8—11 Nm (0.8—1.1 m-kg, 69—95 in-lb)
Delivery pipe
19—25
N
m (1.9—2.6 m-kg, 14—19 ft-lb)
76G04B-082
Installation note
Injector
Refer to page 4B—58.
4B—59