1990 MAZDA 232 Workshop Manual Suplement

B2 OUTLINE
SPECIFICATlONS
Item
Type
Cylrnder arrangement and number
Corn bustlon chamber BP
DOHC Turbo
Gasoline, kycie
In-tine, 4 cylinders
Pentroof
I Vaive svstem I DOHC. bett-driven J
Displacement
Bore and stroke
Compression ratio cc {cu In) 1,839 (112.2)
mm (in) 83.0 x 85.0 (3.27 x 3.35)
8.2
Compression pressure kfa (kg/cm’, psi)-rpm 1,059 (10.8, X4)-300
I
Vatve timing
I Open i3TDC 2*
IN
Close ABDC 51*
EX Open BBDC 59*
Close ATDC 8O
Valve ciearance IN 0: Maintenance-free
mm (in)
EX 0: Maintenance-free
Idle speed rPm 800 f 50'
ignition timing
Firing order
* . ..TEN terminal of diagnosis connector grounded BTDC 100 f lo* l-3-4-2
93G032-704 82-4

c
OUTLINE B2
INTERCHANGEABILITY
The following chart shows interchangeability of the main park of the BP DOHC Turbo engine for the 4WD
model and the BP DOHC Non-Turbo engine for the 2WD model.
Symbols: 5 . Interchangeabie X . . . . Not Interchangeable
Part name interchangeability Remark
1 Cylinder head Shape different
Camshaft oil sea! :
Cylinder head bolt
3
Cyijnder head gasket cl
C$rnder head cover 0
1
Cylinder Cylinder head cover gasket cl
I
Cylinder block 0
block
related Man bearing cap 0
Main bearing support plate 3
OrI pan x Shape different
Trming belt cuver cl
Seal plate 3
Front oil seal I
3
Rear oil seal cl
Crankshaft ‘3
Main bearing 0
Thrust bearing 0
Connecting rod and cap 0
Connecting rod bearing I
0
Crankshaft [ Prston Shape different
related
Piston pin +-- -
c Piston ring cl
Crankshaft pulley 0
Rear cover 3
I Flywheel X Shape different
Flywheel bolt 0
Timing belt
cl
Timing belt Timing belt crank pulley
cl
Camshaft pulley 0 I
related
f Timing belt tensioner and spring
i 0
1, ldter
Camshaft
; Valve timing different
I-LA
Valve I Make - cl
Valve Exhaust 0
related
Vaive sprtng Intake 0
and seat
Exhaust 0
Valve guide cl
Valve seal 0
Oil pump 0
Oil pump gasket 0
Lubrication Oil strainer
0
system Oil strainer gasket
0
related
Oil cooler
0
Oil jet
0
Oil fitter
0
Water pump cl
Cooling
Thermostat
X system Specificatron drfferent
related Radiator X Specificatron different
Cooling fan
X Specification different
^^-^-^ m^- Ix?-5

B2 OUTLINE
CYLINDER HEAD
INTAKE PORT 1 EXHAUST PORT
ENTlFlCATlON MARK
BP TURBO.. .BP26
BP NON-TURBO...BP05
The cylinder head for the BP DOHC Turbo engine is the same as for the BP DO% Non-Turbo engine! ex-
cept that the intake ports are shaped differently.
The identification mark is cast at the rear of the cyfinder head.
Identification:
BP DUHC Turbo
: BP26
BP DOHC
Non-Turbo: BP05
W-6

OUTLINE B2
CYLfNDER BLOCK AND OIL PAN
I BP TURBO
I CONtiECTOR BOLT
BP TURBO
A CYLINDER BLOCK
BLIND PLUG
OIL RtiURN
PIPE
1
93GCB2-7C
The cylinder block is no different. But in conjunction with the newly provided turbocharger, the coolant, and
Mxication oil passages on the cylinder block are used.
Tfie oil pan has a provision for oil to return from the turbocharger.
BZ-7

B2 OUTLINE
PISTON
BP TURBO
V
, J
I BP NON-TURBO
Because of the addition of the turbocharger, the piston crown recess is increased to lower the compression ratio.
B2-8

,
OUTLfNE 82
BP NON-TURBO
The flywheel is shaped differently to accommodate the redesigned clutch disc and clutch cuver.
82-9

82 OUTLINE
CAMSHAFT
IDENTlFlCA~lON MARK
/
EXHAUST
IDENTlFlCATlON MARK
INTAKE
IN
EX BP TURBO
BP26
8P26 BP NON-TURBO
BP05
BP06
TDC
EXHAUST OPEN
The camshaft valve timing specifications are different to improve engine power.

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