cooling MAZDA 626 1987 User Guide

REMOVAL 1C
REMOVAL
1. Disconnect the negative battery cable.
2. Drain the engine oil and coolant.
3. Remove in the sequence shown in the figure referring to the removal note for specially marked parts.
76G01C-071
1. Battery and battery carrier
2. Accelerator cable
3. Air cleaner assembly
4. Radiator harness
5. Radiator hose
6. Radiator and cooling fan
7. Brake vacuum hose
8. Intercooler pipe and hose*
9. Fuel hose
10. Drive belt cover
Note
11. P/S pump
12. No.4 engine mount
13. Clutch release cylinder
14. Speedometer cable
15. Transaxle harness
16. A/C compressor
17. Engine harness
18. Heater hose
19. Front wheel
20. Engine side cover
21. Tie-rod end
22. Stabilizer control rod
23. Lower arm bushing
24. Driveshaft
25. Change rod
26. Extension bar
27. Exhaust pipe and stay
28. Engine mount
29. Engine and transaxle
30. Transaxle
marked parts are equipped only for RF-CX.
1C-31

1C INSTALLATION
Radiator
1. Install the radiator and cooling fan,
Tightening torque:
8—11 Nm (80—110 cm-kg, 69—95 in-lb)
2. Connect the radiator harness.
76G01C-213
3. Connect the upper and lower radiator hoses.
Note
a) Position the hose clamp in the original lo-
cation on the hose.
b) Squeeze the clamp lightly with large pliers
to ensure a good fit.
4. Install the solenoid valve and ground.
Tightening torque:
8—11
N
m (80—110 cm-kg, 69—95 in-lb)
76G01C-232
Air Cleaner Assembly
Install the air cleaner assembly.
Tightening torque:
16—27 Nm (1.6—2.8 m-kg, 12—20 ft-lb)
76G01C-233
Battery and Battery Carrier
1. Install the battery carrier.
Tightening torque:
Bolt A: 31—40
N
m
(3.2—4.1 m-kg, 23—30 ft-lb)
Bolt B: 8—11 N-m
(80—110 cm-kg, 69—95 in-lb)
2. Install the battery tray and battery.
Tightening torque:
5—7 N-m (50—70 cm-kg, 43—61 in-lb)

76G01C-226

1C-98

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 RADIATOR CAP
J I

V
J* J Q lanana
86U03X-028
86U03X-007
86U03X-008
3. Set the heater control switch to the maximum heat
position.
4. Flush the cooling system with water until all traces
of color are gone, then let the system drain com-
pletely.
5. Fill with the proper mixture and amount of ethy-
lene glycol-based coolant.
Caution
a) Do not use alcohol- or methanol-based
coolant.
b) Use only soft (demineralized) water in the
coolant mixture.
Anti-freeze solution mixture percentage

Protection Volume percentage Gravity
at

20°C (68°F) Protection Solution Water
Gravity
at

20°C (68°F)
Above -16°C (3°F) 35 65 1.054
Above -26°C (-15°F) 45 55 1.066
Above -40°C (-40°F) 55 45 1.078

6. Run the engine at idle with the radiator cap re-
moved. Let any air bleed from the system, and add
more coolant.
7. Install the radiator cap, and inspect all connections
for leakage.
RADIATOR CAP
INSPECTION
Radiator Cap Valve
1. Remove foreign material (such as water residue)
from between the radiator cap valve and the valve
seat.
2. Attach the radiator cap to a tester with the SST.
Apply pressure gradually to 74—103 kPa
(0.75—1.05 kg/cm2, 11—15 psi).
3. Wait about 10 seconds; then check that the pres-
sure has not decreased.
Negative Pressure Valve
1. Pull the negative-pressure valve to open it. Check
that it closes completely when released.
2. Check for damage on the contact surfaces, and
for cracked or deformed seal packing.
3. Replace the radiator cap if necessary.
86U03X-009
3A—6

RADIATOR 3A
RADIATOR
REMOVAL AND INSTALLATION
1. Drain the engine coolant.
2. Remove in the sequence shown in the figure.
3. Install in the reverse order of removal.
76G03A-005
5. Upper and lower radiator hose
6. Cooling fan and radiator assembly
7. Cooling fan
INSPECTION
Check the following points. Repair or replace if
necessary.
1. Cracks, damage, or water leakage
2. Bent fins (Repair with a screwdriver)
3. Distorted or bent radiator inlet.
Note
a) Position the hose clamp in the original location on the hose.
b) Squeeze the clamp lightly with large pliers to ensure a good fit. 86U03X-010
1. Coolant reservoir hose
2. ATF hose (ATX)
3. Water thermo switch connector
4. Cooling fan connector
86U03X-012
3A-7

3A COOLING FAN
COOLING FAN
SYSTEM CIRCUIT
IG1 IG Relay
*
No.1
relay
Water thermo switch
I With A/C

CM)
Main fan
1
L..±
No.2
relay
IG2
Add.
relay ol
(M)
A/C sw.
Add fan
86U03X-019
CIRCUIT INSPECTION
1. Turn the ignition switch ON.
2. Disconnect the water thermo switch connector, and
check that the fan operates.
3. If the fan doesn't operate, check the fuse, fan re-
lay, fan motor, thermo switch and wiring harness.
76G03A-010
3 A—12

COOLING FAN 3A
FAN MOTOR
Removal and Installation
1. Remove in the sequence shown in the figure.
2. Install in the reverse order of removal.
7—10 N-m (70—100 cm-kg, 61—87 in-lb)
1.8—2.2 N-m (18—22 cm-kg, 16—19 In-lb)
8—11 Nm (80—110 cm-kg, 69—95 in-lb)
7—10 N-m (70—100 cm-kg, 61—87 In-lb)
76G03A-011
1. Cooling fan assembly (Refer to page 3A—7) 3. Fan
2. Cowling 4. Fan motor
Inspection
1. Connect an ammeter and battery to the fan motor
connectors.
2. Check that the fan motor operates smoothly at the
specified current or less.
Current
MTX: 5.6—7.6 A
ATX: 8.0—11.0 A
3. Replace the fan motor if necessary.
76G03A-012
3 A—13