oil MAZDA 626 1987 Workshop Manual

3B 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
Water pump
1. Remove any gasket fragments, dirt or oil from the
contact surfaces.
2. Install the water pump and new gasket so that the
printed side of the gasket faces the water pump.
Tightening torque:
Bolt A: 31—46 N-m
(3.2—4.7 m-kg, 23—34 ft-lb)
Bolt B: 8—11 N-m
(80—110 cm-kg, 69—95 in-lb)
Water pipe
1. Apply a coat of vegetable oil to the O-ring.
2. Install the water pipe.
Tightening torque:
8—11 N-m (80—110 cm-kg, 69—95 in-lb)
3. Connect the water hose.
76G03B-008
Alternator
1. Install the alternator.
Tightening torque:
Bolt A: 19—26
N
m
(1.9—2.6 m-kg, 14—19 ft-lb)
Bolt B: 37—52 N-m
(3.8—5.3 m-kg, 27—38 ft-lb)
2. Install the alternator drive belt and Comprex su-
percharger drive belt, and adjust the belt deflec-
tion. (Refer to page 1C—7)
76G03B-009
3B—8

Diaphragm

Intake air temperature
Water thermo switches*2 Vacuum switch*2 E/L switches*2 Inhibitor switch*2 Ignition coil
Fuel pump
Water thermo
switch*2
(on radiator)
*1 MTX
*2 Except F6
*3 F6
*4 Except F8 ATX and F6
*5 F6 MTX
*6 Except F8 ATX and F6 ATX
*7 F8 MTX and FE

Engine
control
unit
Engine
control
unit
Ignition coil
Slow fuel cut solenoid
valve ^Reed valve
ATX1
1
MTY

OUTLINE 4A
SPECIFICATIONS
F6 & F8 Engine
Engine F6 F8
Specification General Singapore General
ECE,
Hong Kong, &
Singapore

Idle speed
rpm
MTX 800
+58
Idle speed
rpm
ATX 950
t5§
(in N range)|
900 +5§ (in N
range)
CO concentration
%
2.0
± 0.5
(Without secondary
air
injection)

Carburetor

Type Down draft, two barrel
Throat diameter
mm (in)
Primary 30 (1.18) Throat diameter
mm (in)
Secondary 34 (1.34)
Venturi diameter
mm
(in) Primary 23.5 (0.93) Venturi diameter
mm
(in) Secondary 29.0 (1.14)
Main nozzle
mm (in)
Primary 2.6 (0.10) Main nozzle
mm (in)
Secondary 2.8 (0.11)
Main
jet mm (in)
Primary MTX 1.10 (0.0433) 1.09 (0.0429) 1.14 (0.045)
Main
jet mm (in)
Primary ATX 1.10 (0.0433) 1.08 (0.0425) 1.12 (0.044) Main
jet mm (in)

Secondary 1.50 (0.059)
Main
air
bleed mm (in)
Primary MTX 0.60 (0.024) 0.60 (0.024) 0.55 (0.022) Main
air
bleed mm (in)
Primary ATX 0.60 (0.024) 0.80 (0.031) 0.60 (0.024) Main
air
bleed mm (in) Secondary 0.50 (0.020)
Slow
jet mm (in)
Primary 0.48 (0.019) 0.46 (0.018) Slow
jet mm (in)
Secondary 1.00 (0.039) 1.10 (0.043)
Slow
air
bleed mm (in)
Primary No.1 0.80 (0.031)
Slow
air
bleed mm (in)
Primary No.2 1.90 (0.075) Slow
air
bleed mm (in) Secondary No.1 1.00 (0.039) 0.80 (0.031) Slow
air
bleed mm (in) Secondary No.2 0.50 (0.020)
Power
jet mm (in)
0.50 (0.0201
Fast idle adjustment
mm (in)

Clearance between
Drimarv
throttle valve and bore
1.40-1.76 (0.055—0.069) MTX: 0.48-0.64 (0.019-0.025) ATX: 0.56-0.72 (0.022-0.028)
Float level adjustment mm (in)
Max. fuel flow
"L"

Clearance between
flo

44 (17.3)
at and
air
horn without aasket Float level adjustment mm (in) Fuel stop
"H"
12.5(0.49)
Clearance between float and
air
horn without aasket; float lowered
by
own weight
Choke breaker diaphragm mmHg (inHg)
Start 180-240 (7.1—9.5) 100-160 (3.9—6.3) Choke breaker diaphragm mmHg (inHg) Stop 290-350 (11.4—13.8) 220—280 8.7—11.01
Choke opener mmHg (inHg) Start 35-65 (1.4-2.6)
...
35-65 (1.4-2.6) Choke opener mmHg (inHg) Stop
......
130-190 (5.1-7.5) 130-190 (5.1-7.5)

Fuel tank capacity
Liters (US gal, Imp gal) 60 (15.9, 13.2)

Fuel Dump

Delivery pressure kPa (kg/cm2,
psi)
20-26 (0.20-0.27, 2.8—3.8)
Feeding capacity cc/min (cu in/min) More than 860 (52.5)
at
idle

Fuel filter

Type Paper element with magnet

Air cleaner

Fresh-Hot switching Manual Diaphragm type
Element tvoe Oil permeated paper
Fuel specification Leaded regular

76G04A-513
4 A—15

4A OUTLINE
FE Engine
Engine FE 8Valve FE 12Valve FE 8Valve
Specification General Middle East
ECE, Hong Kong, & Singapore Unleaded fuel

Idle speed
rpm
MTX 800
+5§
850
+5§
Idle speed
rpm
ATX 900
+58 (in N
range)
CO concentration
%
2.0
± 0.5
(Without secondary
air
injection)

Carburetor

Type Down draft,
two
barrel
Throat diameter
mm (in)
Primary 30 (1.18) Throat diameter
mm (in)
Secondary 34 (1.34)
Venturi diameter
mm (in)
Primary 23.5 (0.93) Venturi diameter
mm (in)
Secondary 29.0 (1.14)
Main nozzle
mm (in)
Primary 2.6 (0.10) Main nozzle
mm (in)
Secondary 2.8 (0.11)
Main
jet mm (in)
Primary MTX 1.14 (0.045) 1.09 (0.0429) 1.14 (0.045) 1.09 (0.0429) Main
jet mm (in)
Primary ATX 1.12 (0.044) 1.08 (0.0425) 1.12 (0.044) 1.09 (0.0429) Main
jet mm (in)

Secondary 1.55 (0.061) 1.50 (0.059) 1.55 (0.061) 1.50 (0.059)
Main
air
bleed
mm (in)
Primary MTX 0.50 (0.020) 0.60(0.024) 0.50 (0.020) 0.50 (0.020) Main
air
bleed
mm (in)
Primary ATX 0.55 (0.022) 0.80 (0.031) 0.55 (0.022) 0.50 (0.020) Main
air
bleed
mm (in) Secondary 0.50 (0.020)
Slow
jet mm (in)

Primary 0.46 (0.018)
Slow
jet mm (in)
Secondary MTX 1.10 (0.043) 1.00 (0.039) 1.10 (0.043) 0.90 (0.035) Slow
jet mm (in)
Secondary ATX 1.10 (0.043) 1.00 (0.039) 1.10 (0.043) 1.00 (0.039)
Slow
air
bleed
mm (in)
Primary No.1 0.80 (0.031)
Slow
air
bleed
mm (in)
Primary No.2 1.90 (0.075) Slow
air
bleed
mm (in) Secondary No.1 0.80 (0.031) 1.00 (0.039) 0.80 (0.031) 1.00 (0.039)
Slow
air
bleed
mm (in) Secondary No.2 0.50 (0.020)
Power
jet mm (in)
MTX 0.50 (0.020) 0.50 (0.020) Power
jet mm (in)
ATX 0.50 (0.020) 0.40 (0.016)
Fast idle adjustment
mm (in)
Clearance between primary throttle valve and bore
MTX 0.48—0.64
(0.019-0.025) 1.40—1.76
(0.055-0.069)
0.48—0.64
(0.019-0.025) 1.40-1.76
(0.055-0.069)
Fast idle adjustment
mm (in)
Clearance between primary throttle valve and bore ATX 0.56-0.72 (0.022—0.028)
1.40—1.76
(0.055-0.069) 0.56-0.72 (0.022—0.028)
1.40-1.76
(0.055-0.069)
Float level adjust-
ment
mm (in)

Max. fuel flow
"L"

Clearance between
flo

44 (17.3)
at and
air
horn without aasket Float level adjust-
ment
mm (in)
Fuel stop
"H" |
12.5(0.49)
Clearance between float and
air
horn without aasket: float lowered
bv
own weiaht
Choke breaker diaphragm mm-Hg (in-Hg)
Start 100-160 (3.9—6.3) 180—240 (7.1-9.4) 100-160
(3.9-6.3)
180-240
(7.1-9.4) Choke breaker diaphragm mm-Hg (in-Hg) Stop 220—280
(8.7-11.0)
290-350
(11.4-13.8)
220—280
(8.7-11.0)
290-350
(11.4-13.8)
Choke opener mmHg (inHg)
Start 80—120
(3.1-8.7)
30-70 (1.2-2.8) Choke opener mmHg (inHg)
Stop 220-280 (8.7—11.0) 130-190
(5.1-7.5)

Fuel tank capacity
Liters (US aal, Imp aal) 60 (15.9, 13.2)

Fuel DumD

Delivery pressure kPa (kg/cm2,
psi)
20-26 (0.20—0.27, 2.8-3.8) 20-29 (0.20-0.30, 2.8-4.3)
20-26 (0.20-0.27, 2.8-3.8)
Feedina caDacitv cc/min
feu
in/mini More than 860 (52.5)
at
idle

Fuel filter

Type Paper element with magnet

Air cleaner

Fresh-Hot switchina Diaphragm Manual Diaphragm Bimetal
Element
tvDe
Oil permeated paper
Fuel specification Leaded super
Unleaded super Leaded regular Leaded super Unleaded super Unleaded regular

76G04G-514
4A—16

PARTS INSPECTION 4A
PARTS INSPECTION
AIR CLEANER ELEMENT
Visually check the air cleaner element for excessive
dirt, damage, or oil. Replace, if necessary.
Caution
Do not clean the element with compressed air.
76G04A-021
76G04A-022
76G04A-023
ACCELERATOR LINKAGE
Caution
Confirm that the choke valve is fully open and
that the throttle valve is set to the correct idle
opening.
1. Inspect the deflection of the cable. If the deflec-
tion is not within 1—3 mm (0.039—0.118 in), ad-
just nuts A.
2. Depress the accelerator pedal to the floor and verify
that the throttle valve is fully opened. Adjust bolt
B if necessary.
INTAKE MANIFOLD
1. Visually check the intake manifold for damage.
2. Replace it if necessary.
CHOKE CABLE
Except FE and F8 (General, ECE, Hong Kong, and
Singapore)
1. Pull the choke knob and confirm that the choke
valve is fully closed.
2. Return the choke knob and confirm that the choke
valve is fully opened.
3. Adjust the position of the outer cable, if necessary.
76G04A-024
4A-23

4 A DECELERATION CONTROL SYSTEM
BYPASS AIR CONTROL SYSTEM
FE and F8 [Except General and Middle East]
E -tr Air bypass solenoid valve
I
Engine
control
unit
FE 8 Valve — Unleaded fuel

J
f^^n
Ignition coil
Idle switch
76G04A-084
The bypass air control system consists of the bypass solenoid valve, idle switch, ignition coil, and en-
gine control unit.
This system opens the bypass air passage to the intake manifold during deceleration above ap'prox.
2,300 rpm (ECE, Hong Kong, and Singapore), or above approx. 3,500 rpm (FE 8 Valve—Unleaded
fuel).
Note
Make the system inspection first. If no problem is found, continue with the next inspec-
tion of the Troubleshooting. (Refer to page 4A—46 or 47.)
Troubleshooting
Possible cause System inspection Air bypass solenoid valve
Page 4A-48 4A-49
Checking order 1 2
/
/o fcl i /o ' jXj^/* J
V\ i \\ I M
p)
/ Terminal AGL...Leaded Fuel
L LB...FE 8 Valve—Unleaded Fuel
System Inspection
1. Warm up the engine and run it at idle.
2. Connect a tachometer.
3. Disconnect the bypass air hose from the air cleaner
and place a finger over the hose opening.
76G04A-085
4A—48

4 A DECELERATION CONTROL SYSTEM
COAST ENRICHMENT SYSTEM [FE 8VALVE—UNLEADED FUEL]
Ignition coil
Engine
control
unit
Coast enrichment
solenoid valve
Richer air bleeds
Secondary main
air bleed
Idle switch
© e
To secondary
main jet
76G04A-098
This system opens the fuel passage to the secondary stage of the carburetor during deceleration at
engine speeds of 2,300—1,500 rpm. The coast enrichment solenoid valve is actuated by the engine
control unit.
Troubleshooting
Possible cause System Inspection Coast enrichment solenoid valve
Engine control unit terminal Possible cause System Inspection Coast enrichment solenoid valve
A B D 1
Page 4A—54 4A—55 4A—91
Checking order 1 3 2
System Inspection
1. Warm up the engine to the normal operating tem-
perature and run it at idle.
2. Connect a voltmeter to the carburetor connector
terminal E.
3. Connect a tachometer to the engine.
76G04A-099
4A—54

4A DECELERATION CONTROL SYSTEM
COASTING LEANER SYSTEM (F6 SINGAPORE MTX)
Coasting leaner
0 oAir
a n, © © Battery Ignition
switch Secondary
throttle valve
| / Relay
Engine control unit
Ignition coil
76G04A-102
This system consists of the coasting leaner solenoid valve, engine control unit, ignition coil, and idle switch.
When the idle switch is ON and the engine speed is more than approx. 2,100 rpm (deceleration),
the coasting leaner solenoid valve opens the air passage port to prevent afterburn in the exhaust system.
Troubleshooting
Note
Make the system inspection first. If no problem is found, continue with the next inspec-
tion of the Troubleshooting. (Refer to page 4A—47)
Possible cause System inspection Coasting leaner solenoid valve Relay
Page 4A—56 4A—57 4A—57
Checking order 1 2 3
Coasting leaner System Inspection
1. Warm up the engine and run it at idle.
2. Connect a tachometer to the engine.
3. Connect a voltmeter to the coasting leaner sole-
noid valve connector (LgB wire).
76G04A-103
4A—56

4 A IGNITION TIMING CONTROL SYSTEM
IGNITION TIMING CONTROL SYSTEM
F8 and FE (12-VALVE)—ATX (ECE, Singapore, and Hong Kong)
Ignition coil
76G04A-160
This system consists of the distributor, solenoid valve, and several switches, vacuum to the vacuum
control unit of the distributor is cut when the conditions below are met.
Item Condition
Engine speed Below 2,300 rpm
Selector lever position Other than P and N range
Coolant temperature Engine coolant: below 72°C (162°F) Radiator coolant: above 17°C (65°F)
4A—80