1987 MAZDA 626 Workshop Manual

OIL PUMP 2B
DISASSEMBLY
Disassemble in the sequence shown in the figure. 69G02B-012
INSPECTION
1. Check the following and replace any faulty parts.
(1) Distorted or damaged oil pump body or cover
(2) Worn or damaged plunger
(3) Weak or broken plunger spring
2. Measure the side clearance.
Clearance:
0.14 mm (0.006 in) max.
3. Measure the tooth tip clearance.
Clearance: 0.24 mm (0.009 in) max.
2B-13

76G02B-031
76G02B-032
ASSEMBLY
Assemble the pump as follows.
Oil Seal
1. Apply engine oil to the pump body and the out-
side of the new oil seal. 2. Press in the oil seal.
Pressure Relief Valve
1. Install the plunger and spring in the pump body.
2. Install the spring seat plug and tighten to specifi-
cation.
Tightening torque:
26—39 N-m (2.7—4.0 m-kg, 20—29 ft-lb)
Outer and Inner Rotor
Install the rotors with the assembly mark facing the
pump cover.
Oil Pump Cover
1. Apply thread locking compound to the cover
mounting screws' threads.
2. Attach the oil pump cover to the body.
Tightening torque:
6—9 N-m (60—90 cm-kg, 52—78 in-lb)
76G02B-037
INSTALLATION
Install in the reverse order of removal referring to in-
stallation note.
Installation Note
Oil pump
1. Apply grease to a new O-ring and install it in the
oil pump body.
2. Apply silicon sealant to the shaded area as shown
in the figure.
3. Apply engine oil to the oil seal lip.
76G02B-033
2B-14

OIL JET 2B
OIL JET
REMOVAL
Remove each part in the following order.
1. Remove the oil pan. (Refer to page 2B—9).
2. Remove the oil jet valve.
3. Remove the oil jet.
76G02B-034
INSPECTION
1. Make sure that the oil passage is not clogged.
2. Check that the oil jet valve is not stuck or damaged.
INSTALLATION
Install in the reverse order of removal.
Tightening torque: 12—18 N-m
(1.2—1.8 m-kg, 104—156 in-lb)
76G02B-035
2B—15

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

COOLANT 3A
76G03A-016
69G03A-006
COOLANT
INSPECTION
Coolant Level (Engine cold)
1. Check that the coolant level is near the radiator inlet
port.
2. Check that the coolant level in the coolant reser-
voir is between the FULL and LOW marks.
Add coolant if necessary.
Warning
a) Never remove the radiator cap while the en-
gine is hot.
b)Wrap a thick cloth around the cap when
removing it.
Coolant Quality
1. Check that there is no build-up of rust or scales
around the radiator cap or radiator filler neck.
2. Check that coolant is free from oil.
3. Replace the coolant, if necessary.
Coolant Leakage
1. Connect a tester and SST to the radiator inlet port.
2. Apply 103 kPa (1.05 kg/cm2, 15 psi) pressure
to the system.
3. Check that the pressure is held.
If not, check for coolant leakage.
Warning
When removing either the radiator cap or the
tester, loosen it slowly until the pressure in
the radiator is released, and then remove it.
86U03X-005
REPLACEMENT
1. Remove the radiator cap and loosen the drain plug.
2. Drain the coolant into a suitable container.
Warning
a) Never open the radiator cap while the en-
gine is hot.
b)Wrap a thick cloth around the cap when
loosening.
c) Use caution when draining hot coolant.
86U03X-006
3A-5