1992 MAZDA PROTEGE cooling

ENGINE TUNE-UP PROCEDURE
I
03UOB2-011
Idle Speed
1. Perform “Preparation”. (Refer to page BZ-8.)
2. Apply parking brake.
3. Check that the idle speed is within specification.
Idle speed (Neutral or P range): 750 f 50 rpm
Caution
l Check the idle speed without the electric cooling
fan operating.
Note
l When the parking brake is not applied, the idle
speed for ATX model (Canada) is approx. 800 rpm.
4. If not within the specification, adjust the idle by turning the
air adjusting screw.
5. Disconnect the
SST.
82-Q

REMOVAL
REMOVAL
Warning
l Release the fuel pressure. (Refer to Section F.)
PROCEDURE
1. Disconnect the negative battery cable.
2. Drain the engine coolant and transaxle oil,.
3. Remove in the order shown in the figure, referring to
Removal Note.
Step
1
1. Undercover and side cover 12. Oil cooler hose (ATX)
2. Resonance chamber 13. Cooling fan connector
3. Air cleaner assembly 14. Radiator switch connector (ATX)
4. Battery bracket 15. Radiator bracket
5. Battery cover 16. Radiator and cooling fan assembly
6. Battery
17. P/S and/or A/C drive belt
7. Battery carrier Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page B2- 6
8. Battery duct 18. P/S oil pump and bracket
9. Accelerator cable Removal Note . . . . . . . . . . . . . . . . . . . . + . . . . . . page 82-32
10. Radiator hose 19. A/C compressor (if equipped)
11. Coolant reservoir hose Removal Note.. . . . . . . . . . . . . . . . . . . . . . . . . . page 82-32
B2-31

INSTALLATION
03UOB2-141
/ 03UOB2-14!
1 03UOB2-150
03UOB2-151
8,’
1
a : :“.;,
.’
s,::, ; i .:.;...
..:.a.. :..,:.
. .
. .
” . : 0 ,.: ::
: .:.. ..,
., ‘:;
.<.,:.,);
‘zi :
I 0311082-152
A/C compressor (If equipped)
1. Install the A/C compressor.
Tightening torque:
24-35 N,m (2.4-3.6 m-kg, 17-26 ft-lb)
2. Tighten the A/C pipe bracket to the engine mount member.
Tightening torque:
6.4-9.3 N-m (65-95 cm-kg, 56-62 in-lb)
P/S oil pump and bracket
1. Install the P/S oil pump and bracket.
Tightening torque:
37-52 N.m (3.8-5.3 m-kg, 27-38 ft-lb)
Drive belt
1. Install the P/S and/or A/C drive belt.
2. Adjust the drive belt deflections. (Refer to page B2-6.)
Radiator and cooling fan assembly
1. Install the radiator and cooling fan assembly.
Tightening torque:
7.8-11 N-m (80-110 cm-kg, 69-95 in-lb)
2. Connect the upper and lower radiator hoses.
Caution
l Position the hose clamp in the original location on
the hose, and squeeze the clamp lightly with large
pliers to ensure a good
fit.
3. Connect the coolant reservoir hose.
4. Connect the cooling fan connector.
5. Connect the oil cooler hose. (ATX)
B2-101

E
COOLING SYSTEM
INDEX ...................................................... E- 2
OUTLINE .................................................. E- 4
SPECIFICATIONS .................................... E- 4
TROUBLESHOOTING GUIDE ...................... E- 4
ENGINE COOLANT .................................... E- 5
PREPARATION ....................................... E- 5
INSPECTION ..........................................
REPLACEMENT ...................................... :z ;
RADIATOR CAP ........................................
PREPARATION ....................................... ;I ;
INSPECTION .......................................... E- 7
RADIATOR ............................................... E- 8
REMOVAL / INSTALLATION ...................... E- 8
INSPECTION .......................................... E- 9
THERMOSTAT .......................................... E- 9
REMOVAL / INSTALLATION ...................... E- 9
INSPECTION .......................................... E- 9
WATER PUMP .......................................... E-l 1
REMOVAL / INSTALLATION ...................... E-l 1
ELECTRIC COOLING FAN SYSTEM ............ E-13
SYSTEM CIRCUIT .................................... E-l 3
SYSTEM INSPECTION .............................. E-14
FAN MOTOR ............................................. E-14
INSPECTION .......................................... E-l 4
REPLACEMENT ...................................... E-l 5
WATER THERMOSWITCH .......................... E-l 8
REMOVAL / INSTALLATION ...................... E-18
INSPECTION .......................................... E-l 8
RADIATOR THERMOSWITCH ..................... E-l 7
REMOVAL I INSTALLATION ...................... E-17
INSPECTION .......................................... E-l 7
FAN RELAY .............................................. E-l 8
REMOVAL I INSPECTION .......................... E-l 8
INSPECTION .......................................... E-l 8
23UOEX-001

INDEX
B6 SOHC AND BP SOHC
COOLANT RESERVOIR
@ ENGINE COOLANT
TOTAL CAPACITY
MTX: 5.0 liters (5.3 US qt, 4.4 Imp qt)
ATX: 6.0 liters (6.3 US qt, 5.3 Imp qt)
1. Engine coolant 6. Electric cooling fan system
23UOEX-00
inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page E- 5
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page E-
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
page E- 2. Radiator cap
7
3. Radiator
Removal I Installation . . . . . . . ,.......... page E- 8
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page E- 9
4. Thermostat
Removal / Installation . . . . . . . . . . . . . . . . . . page E- 9
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page E- 9
5. Water pump
Removal / Installation ....t___.......... page E-i 1
System
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8. Water thermoswitch
Removal / Installation . . . . . . . . . . . . . . . . .
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9. Radiator thermoswitch (BP ATX) System
Removal I Installation . . . . . . . . . . . . . . . . . inspection . . . . . . . . . . . . . . . . . . . . . .
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IO. Fan relay
7. Fan motor
Removal / Inspection . . . . . . . . . . . . . . . . . page E-13
page E-14
page E-14
page E-15
page E-16
page E-16
page E-17
page E-l 7
page E-18 ..--’
E-2

E
BP DOHC
-a TO HEATER
&$ No.1 RELAY
COOLANT ~~ESERVOI~~
@ ENGINE COOLANT
TOTAL CAPACITY
MTX: 5.0
liters (5.3 US qt, 4.4 Imp qt)
ATX: 6.0 liters (6.3 US qt, 5.3 Imp qt)
23UOEX-00
1. Engine coolant
6. Electric cooling fan system
Inspection ...................................
page E- 5 System circuit
.............................
page E-l 3
Replacement ...............................
page E-
6 System inspection
....................... page E-14
2. Radiator cap
7. Fan motor
Inspection ................................... page E- 7
Inspection ...................................
page E-14
3. Radiator
Replacement..
............................. page E-i 5
Removal / Installation..
................
page E-
8 8. Water thermoswitch
Inspection
.................. ................................... page E- 9 Removal / Installation
page E-16
4. Thermostat
Inspection ...................................
page E-l 6
Removal I Installation
.................. page E- 9 9. Radiator thermoswitch (ATX)
Inspection
.................. ...................................
page E- 9 Removal I Installation
page E-l 7
5. Water pump
Inspection
...................................
page E-l 7
Removal / Installation ..................
page E-i 1 10. Fan relay
Inspection ...................................
page E-l 8
E-3

E OUTLINE, TROUBLESHOOTING GUIDE
OUTLINE
SPECIFICATIONS
B6 SOHC
BP SOHC BP DOHC
MTX
1 ATX 1 MTX ATX 1 MTX
ATX
Cooling system
Water-cooled, forced circulation
Coolant capacity liters (US qt, Imp qt) 5.0 6.0
5.0
(5.3, 4.4) (6.3, 5.3)
(5.35.04.4) (6.zi.3) (5.3, 4.4) (6.::.3)
Water
pump
Thermostat
Radiator
Cooling fan
L Type
Water seal Centrifugal
Unified mechanical seal
Type Opening temperature
‘C (OF’) Wax, two-stage
Main: 86.5-89.5 (188-193)
Sub : 83.5-86.5 (182-188)
Full-open temperature
OC (OF)
Full-open lift mm (in)
Type
Cap valve opening
pressure 100 (212)
Main: 8.0 (0.31) min.
Sub : 1.5 (0.06) min.
Corrugated fin
74-103 (0.75-1.05, 11-15)
kPa (kg/cm2, psi)
Width
Core size Height
mm (in)
Depth
Fin pitch
mm (in) 647 (25.47)
390 (15.35)
16 (0.63) 1 25 (0.98) 1 16 (0.63) 1 25 (0.98) 1 16 (0.63) 1 25 (0.98)
1.3 (0.051)
Heat dissipation capacity
kcallh 1 38,800 [ 43,800 ( 38,800 1 43,800 1 38,800 1 43,800 1
Type
Transaxle Heat
oil cooler dissipation
capacity
kcallh
Tvoe
- Laminated - Laminated -
Laminated
1,700
I .I -?nn
- -
I,,“”
I
I - I 4 Ye,-. I,IVV 1
, a-
- Electric
Number of blades 4
Outer diameter mm (in)
320 (12.6)
Capacity w-v 80-12 1 160-12 ) 80-12 ) 160-12 1 80-12 1 160-12
1 Hi: 13.3+ 1 1 Hi: 13.3+ 1 1 Hi: 13.3+
Current
TROUBLESHOOTING GUIDE I I I I
Problem Possible Cause
Overheating
Coolant level insufficient
Coolant leakage
Radiator fins clogged
Radiator cap malfunction
Cooling fan malfunction
Thermostat malfunction
Water passage clogged
Water puma malfunction .- Remedy Page
Add
Repair
Clean
Replace
Replace
Replace
Clean
Reolace E- 6
E-9
E- 7
E-13
E- 9
E- 6
E-11
I Corrosion
1 Impurities in coolant 1 Replace
I E-6 I
03UOEX-005

ENGINE COOLANT E
ENGINE COOLANT
PREPARATION
SST
49 9200 145
For 49 9200 146
For
inspection of inspection of
cooling system Adapter A cooling system
pressure (Part of pressure
49 9200 145)
05UOEX-00
INSPECTION
Warning
l Never remove the radiator cap while the engine is
hot.
l Wrap a thick cloth around the cap when removing it.
l When removing the radiator cap, loosen it slowly
to the first stop until the pressure in the radiator is
released, and then remove it.
03UOEX~006
Coolant Level (Engine cold)
1. Verify that the coolant level is near the radiator filler neck.
2. Remove the coolant level gauge and check the coolant level.
Coolant Quality
1. Verify that there is no buildup of rust or scale around the
radiator cap or radiator filler neck.
2. Verify that coolant is free of oil. Replace the coolant if
necessary.
Coolant Leakage
1. Connect a radiator tester (commercially available) and the
SST to the radiator filler neck.
2. Apply
103 kPa (1.05 kg/cm2, 15 psi) pressure to the
system.
3. Verify that the pressure is held.
If not, check for coolant leakage.
E-5