1990 MAZDA 232 oil

D
D
SUPPLEMENTAL SERVICE iNFORMATION, COMPRESSION 82
SUPPLEMENTAL SERVICE INFORMATION
The following points in this section are changed in comparison with Workshop Manual [Europe (7 203~IO-899,
Australia (I 204-1 U-89F) 1.
Compression
l Inspection
Engine
l Removal
l Engine stand mounting
l Engine stand dismounting
l Ins:attaIion 93GQ32-77 I
COMPRESStON
If the engine exhibits low power, poor fuel economy, or poor idle, check the following:
1. Ignition system (Refer to Section G.)
2. Compression
3. Fuel system (Refer to Section F3.)
93G032-774 93GO32-712
1NSPECTION
1. Verify that the battery is fully charged. Recharge it if
necessary.
2. Warm up the engine to normal operating temperature.
3. Turn the engine OFF.
4. Remove all of the spark plugs.
5. Disconnect the ignition coil connector.
6. Connect a compression gauge to the No.7 spark plug hole.
7. Fully depress the accelerator pedal and crank the engine.
8. Record the maximum gauge reading.
9. Check each cylinder in the same manner.
Compression:
1,059 kPa (IO.8 kg/cm2, 154 psi)-300 rpm
Minimum:
785 kPa (8-O kg/cm2, 114 psi)-300 t-pm
Allowable difference between cylinders:
196 kPa (2.0 kglcm2, 28 psi) max.
IO. If the compression in one or more cylinders is low, pour a
small amount of engine oil into the cylinder and recheck
the compression.
(1) If the compression increases, the piston, piston rings,
or cylinder waII may be worn.
(2) If the compression stays tow, the valve may be stuck
or seating improperly.
(3) If the compression in adjacent cylinders stays low, the
cylinder head gasket may be defective or the cylinder
head distorted.
1 I. Connect the ignition coit connector.
12. Apply antiseize compound or molybdenum-based lubricant
to the spark plug threads.
73. Install the spark plugs.
Tightening torque:
15-23 N-m (1.5-2.3 m-kg, If-17 ft-Ib)
82-11

B2 REMOVAL
REMOVAL
Warning
l Release the fuel pressure. (Refer to Section FZ.)
PROCEDURE
i. Disconnect the negative battery cable.
2. Drain the engine coolant and transaxle oil.
3. Remove in the order shown in the figure, referring to Removaf Note
Step 1
1. Strut tower bar
2. Undercovers and side covers
3. Air cleaner assembly
4.
Battery bracket
5. Battery cover
6. Battery
7. Battery carrier
8. Accelerator cable
9. Radiator hoses
10. Coolant reservoir hose
f I. Cooling fan connector
12. Radiator switch connector
13. Radiator bracket
14. Radiator and coofing fan assembly
15. Battery duct
16. Air pipe and air bypass valve
17. Intercooler and air pipe
Removat Note . . . . . . . . . . . . .._.. m _._._..., page 82-U
18. Air pipe and gasket
19. P/S and/or AK drive bett
20. P/S oil pump and bracket
Removal Note . . . . .._.__.....~..~........ page BZ-13
21. A/C compressor
Removal Note . . . . . .._................... page 82-I 3
22. Crossmember
02-12

REMOVAL B2
Removal note
intercooler and air pipe
I. Disconnect the hoses shown in the figure.
936032-718
2. Remove the nuts and the intercooler bracket shown in the
figure.
3. Loosen hose band @.
4. Remove bolt @and nut 0.
5. Remove the intercooler and air pipe downward.
RemovaI note
P/S oil pump
Caution
l Do not damage the hoses.
I _ Remove the P/S oil
pump with the hoses still connected.
2. Position the pump away from the engine and secure it with
wire.
93GO52-748
1 93GOB2~749
NC compressor
Caution
l Do not damage the hoses.
1. Remove the AC compressor with the hoses still connected.
2. Position the compressor away from the engine and secure
it with wire.
B2-13

B2 REMOVAL
Step 2
1. Disconnect the harness connectors shown in the fiuure.
ALTERNATOR OIL PRESSURE SWITCH
\. PRESSURE REGULATOR
STARTER
CObjTROL VAVLE
E-SPEED CONTROL
CTOR
KNOCK SENSOR
SWITCH
03 w 08X-80’
Step 3
I. Disconnect the hoses shown in the figure.
-
------a-
93GOB2-720
82-14

B2 REMOVAL
93ECB2-025
c
Removal note
Tie-rod end
1. Remove the cotier pin and loosen the nut until it is flush with
the end of the ball joint stud.
Caution
l Do not reuse the cotter pin.
2. Separate the ball joint from the knuckle arm with the SST.
Driveshaft
1. Remove the joint shaft.
2. Remove the lower arm bali joint clinch bolt.
Caution
l Do not damage the ball joint dust boot.
3. Pry the lower arm downward to separate it from the knuckle.
Caution
l Do not damage the oil seat.
1
03tiOBX-81:
Bz-t6
4. Separate the driveshafi from the Vansaxle.

B2 ENGINE STAND DISMOUNTING
93GOB2-7%
93AOB2-077
05WOBX-25
82-22 Water Bypass Pipe
1. Apply a small amount of engine coolant to the new O-ring.
2. install the O-ring on the pipe.
3. InstaIi the water bypass pipe.
A/C Compressor Bracket (if equipped)
1. Install the A/C compressor bracket.
Tightening torque
@: 19-25 N&m (1.9-2.6 m-kg, 14-19 ft-lb)
@: 37-52 Nom (3.8-5.3 m-kg, 27-38 ft-fb)
Exhaust Manifold and Turbocharger Assembly
I= Remove all foreign material from the exhaust manifold con-
tact surfaces.
2. Install a new gasket.
3. Instatl the exhaust manifold and turbocharger assembly.
Tightening torque:
38-46 N-m (3.9-4.7 m-kg, 28-34 ft-lb)
4. Connect the water hose to the water bypass pipe.
5. Connect the water hose and the oil pipe to the cylinder
block.
Tightening torque
@: 12-18 N-m (I -2-l .8 m-kg,
6. Connect the oil return hose to the oi 8.7-13 ft-lb)
I pan.
Exhaust Manifold Insulator
1. Install the exhaust manifold insulator.
Tightening torque:
7.8-I 1 Mm (80-I IO cm-kg, 69-95 in-lb)

INSTALLATION
step 3
Torque Specifications
6.9-11 Nn-i (70-110 cm-kg, 6l--95 in-lb)
0 (2.8-3.1, 20-221
59 (4.4-6.0, 3143)
GASKET,REPtiCE
/
/
31-46 (3.24.7, 23-34) ~//<~~z”““‘” PIN REP!JCE
21-2? (2.3-2.8, 15-20) - - - - ’
N-m (m-kg, fi-tb)
93GOB2.736
Propeller shaft
I. Install the propeller shaft. (Refer to page L-5.)
93GOB2-734
Drive&aft
I. Apply grease to the end of the driveshaft.
Caution
l When installing the driveshaft, be careful not to
damage the transaxle oil seal.
l After installation, pull the front hub outward to con-
firm that the driveshaft is securefy held by the clip.
2. Install the driveshaft along with a new clip.
3. tnstall the lower arm ball joint to the knuckle and tighten the
clinch bolt.
Tightening torque:
43-59 Nm (4.4-6.0 m-kg, 31-43 ft-lb)
82-27

B2 INSTALLATION
Step 5
1. Connect the harness connectors shown in the figure.
ALTERNATOR OIL PF;IESSURE SWITCH PRESSURE REGULATOR
STARTER CONTROL VAVLE
GRoYD O-i-l-tE SENSOR
IDLE-SPEED CONTROL
KNOCK SENSOR
OXYGEhENSO$
Step 6
Torque Specifications
03UO8X-33’
7.8-11 N-m
(80-110 cm-kg, 69- .
11 N-m (80--f ’IO cm-kg, 69-95 in-lb)
N-m
cm-kg, 69-95 in-Ib)
37-52 (3.8-5.3, 27
7.8--fl N-m (80 107 (9.6-T 1.9, 69-79)
N-m (m-kg, ft-lb)
03U03X-83