engine MAZDA 323 1992 Suplement Repair Manual

OUTLCNE
OUTLDJE OF CONSTRUCTION
. The 323 GT-R is added to the 323 BP DOHC turbo model lineup.
l All GT-R modek are equpped with the G25MX-R (GSMX-R) manual transaxle and transfer unit.
l The transaxle and transfer unit is the same as in the 323 BP DOt-tC turbo models, except that the speedo-
meter gear ratio is changed.
Note
l Transaxk code is as shown.
G25MX-R
--r--r T
13EOJ3-302
SPECIFtCATIONS
Transaxle and Transfer Unit
Item
Transaxte control
Synchromesh system
Gear ratio Model/Engine
Forward
Reverse
1 st
2nd
3rd
4th
1 5th
Reverse
FInal gear rat10 I
Speedometer gear ratio f
Type
Number of rrng Outer
gear teeth
Inner
Center diff erentlal Number of plnion Outer
gear teetn
Inner
Numbef of sun Pinion gear side
gear teeth
idler gear side
Number of idler gear teeth
Grade
Oh Vtscosity All-season
Above -18OC { O°F 1
Capacity t ( LB qt, Imp qtl 323 GT-R
0.717 I Other
3.166 323 4WD
BP DOHC turbo
Floor shift
Synch romesh
Setecttve slrdrng and synchromesh
3.454
1.833
I.310
0.970
4.214
1.045
I 1 .OUU
Pfanetary carrier
59
I
75
14
14
43
43
37
API service U-4
ATF Dexron@II or M-III
SAE 75W-90
2.6 (2.7, 2.2)
13EOJ3-303
Transfer Carrier
Number
Orl of
- teeth
Grade
Viscosity
CaDacitv Rung gear
Pinron gear
Above -18OC fO°F]
Below -t8OC I PF 1
L I US at. imn at 1 37
31
API service ‘Gt-5
SAE 90
SAE BOW
0 5 10.53. 0.44 t
J3-2 ._

OUTLINE M
OUTttNE
OUTLiNE OF CONSTRUCTION
l TKe construction and operation of the front and rear axles are basically the same as previous models.
l Because of the use of a high power engine, the following parts are modified to improve rigidity.
(I) Larger front and rear bearings are used.
(2) Larger front and rear knuckles are used.
(3) A five-stud wheel hub is used.
l An ice scraper is newly installed on the rear knuckle to prevent ice from building up on the brake caliper.
(Refer to page M-14.)
13EOMX-303
SPECIWCATIONS
Hem Speclficatlons
Front driveshaft
Joint type inside
Double offset joint
Outsrde Bell joint
Length of joint (between center of joint) Right
392 I15.4)
mm lrn)
Left 306 IO.831
Shaft drameter mm fin)
21.0 (0.83)
Rear driveshaft
Inside
Joint type Double offset joint
Outside 5ell joint
Length of joint (between center of joint) Right
519.5 [ 20.5 1
mm [in]
Left.
489.5 ( 19.3 )
Shaft diameter mm (in) 21.0 [O&3]
Joint shaft
I
Length of joint
Shaft diameter
Front axle
mm jin] 357.2 114.11
mm {in] 21.0 {0.83]
4
Bearing play axial direction mm tin)
0.05 IO.002 ]
I
Rear axle
Bearing play axial direction mm (inj
Rear dtfferentlal (viscous limited slip differential) 0.05 (0.002 1
Reduction aear Hypoid gear
Differentral gear
Drfferential ratio Straight bevel gear
3.909
Number of teeth Ring gear .
Drive binion aear
43
If
Fluid I Grade API Service GL-5
Above -t8*C (O*F) SAE 90
Viscosity .
Below -18*C i O*Fl SAE 8OW
1 I Capacity L I US qt, imp stl 1 0.65 !O.SS, 0.571
1
13EOMX-304
M-3

OUTLlNE P
OUTLfNE
OUTLINE OF CONSTRUCTION
l The brake system remains similar to that of the previous model. l However, because all new models use a higher-horsepower engine, the brake system is enlarged as a whole.
l Vehicles without ABS use a portless-type master cylinder
13EOPX-303
SPECIFICATIONS
Brake pedal
Master cylinder
Front drsc brake
Rear disc brake
Power brake unit
Braking force control device
Brake fluid
Parking brake Item Specification
Type Suspended
I
PedaJ lever ratio 4.1
Max. stroke mm [in] 140 j5.511
I,
Type Tandem
Cylinder inner diameter mm {in] Without ABS: 25.4 j 1 .UO ]
With ABS: 23.8 to.941 3-
Type Ventilated disc ?
Cylinder bore mm [in)
57.2 12.253
Pad dimensions (area x thickness)
mm2 {rn2) xmm [In) 5,200 (8.OSl x 10 (0.39)
Disc plate dimensions mm (in]
(outer diameter x thickness) 274x24 (10.79x0.94)
Type Solid disc
Cylinder bore mm Jon]
34.9 j 1.37 ]
Pad dimensions (area x thrckness)
mm’ (in21 xmm [in) 3,200 I4.961 x8 (0.31)
DISC plate dimensions mm t,n]
(outer diameter x thickness) 280x10 (tl.02xu.39]
il
Type Without ABS: Vacuum multIplier
With ABS: Hydraulrc muttiplier
Diameter mm Iln]
(without ABS) 188.4 17.42) +215.2 t8.47)
We Without ABS: Dual proportioning valve
With ASS: Proportioning valve
FMVSS 116, DOT-3, SAE J1703
Mechanical twGrear-wheel control
Type
Operation system Center lever
13EOPX.304 t

P CONVENTIONAL BRAKE SYSTEM
1 t3EOPX.314
@ 66.7 kPa
Iso0 mmHg.
19.7 inHg)
16EOPX-05t
1
13EOPX.315
P-8
POWER BRAKE UNIT
Quick Inspection (On-vehicle)
Power brake unit function check
(Method-using tester)
Connect the SST, vacuum gauge A, and pedal depression
force gauge B as shown in the figure. After bleeding the
air from the SST, conduct the test as described in the 3steps
below.
Note l
Use commercMty available vacuum gauge and ped.
al depression force gauge.
a) Checking for vacuum loss
Unloaded condition
1. Start the engine.
2. Stop the engine when the vacuum gauge reading reaches
66.7 kPa (500 mmHg, 19.7 inHg ) .
3. Observe the vacuum gauge for 15 seconds. If the gauge
shows 63.3-66.7 kPa [475--500 mmHg, 18.7-19.7
inHg 1, the unit is operating.
Loaded condition
1. Start the engine.
2. Depress the brake pedal with a fdrrce of 196 N I20 kgf,
44 Ibfj.
3. With the brake pedal depressed, stop the engine when the
vacuum gauge reading reaches 66.7 kPa {SO0 mmlig,
19.7 inHg].
4. Observe the vacuum gauge for 15 seconds. If the gauge
shows 63.3-66.7 kPa I475--500 mmHg; 18.7-l 9.7
inHg 1, the unit is operating.
b) Checking for hydraulic pressure
1, If with the engine stopped (vacuum 0 kPa (0 mmHg, 0
hltlg 1) the fluid pressure is within specification, the unit is
operating.
Pedal force N fkgf. Ibf]
Fluid pressure kPa (kgf/cm2, psi)
196 LZO. 441 1080 111. 1561 min.
2, Start the engine. Depress the brake pedal when.the vacu-
urn reaches 66.7 kPa 1500 mmHg, 19.7 intlg 1. If the flu-
id pressure is within specification, the unit is operating.
Pedal force N 1 kgf, fbf I Fluid pressure .kPa { kgflcm’. ps 1
196 I20,441 6670 {68, 967
1 min.
-- WlTHOU
&
d
I=-
-
1 MASTER CYUh
.
i_

R OUTLINE
OUTLINE
OUTLtNE OF CONSTRUCTION
l The%onstruction and operation of the suspension system are basically the same as for previous models.
l The coil spring and shock absorber specifications are changed.
l The stabilizer specifications are changed.
SPECIFICATIONS
13EORX-302
Front suspension
Suspension type
Sprmg type
Shock absorber
Stabrlmr
Specifications
Strut
Coil spring
Oil filled Total toe-rn
Front
wheel
atignment
(‘Unladen)
Rear suspension
Suspensron type
Sprmg type
Shock absorber
Stabrlrzer
Rear wheei
alrgnment
(‘Unladen) Maximum steering 38* f 3*
309 f 30
-0045 f 45’
2035’ f 45’
KIngpin angle degree
12*to’
We Oil fifled
Damprng force N [ kgl Ibf 1 .‘? .@g,$g&;qJ&,$. ‘: ‘., . . ” ‘, : :,
at 0.3 m 112
]ls I Contraction ;. ~ .. . . . . .__. ..:, .. .. ,I. ._ :. . . f: ; _... .:
Type Torsion bar
Diameter mm. f in ]
19.t (0.751
Total toe-in mm fin!
2.h 3 (0.08 f 0.121
degree
O”12’ f 18’
Camber angle degree -0°20’ f 45’
13EORX-303
l Fuel tank full, radrator coolant and engine oil at speclfled levels; and spare tire, jack, and tools in designated positions. Front Coil Spring Specifications
1 Identification mark color Wire diameter Coif .center
M l l
I Free length A a2 mm lin)
diameter mm [in) . mm 1 in) Coil number Rear Coil Spring Speci?ications
ldentlfication mark color M” Wire diameter Coil center
Free length
mm {in) diameter mm 1 in J
mm {in) Coil number
*’ Maln Identlfcatlon mark on second cgil from bottom.
*’ Auxrllary &entificatton mark on thrrd coil from bottom.
Shaded areas tndcate
new specifrcat+ons 13EORXCS05
(I .f

TD
TECHNICAL DATA
ENGtNE ..................................................
TD- 2
LUBRICATlON SYSTEM ...........................
TD- 4
COOLING SYSTEM ..................................
TD- 5
FUEt AND EMISSION CONTROL
SYSTEMS
.............................................
TD- 6
ENGINE ELECTRICAL SYSTEM
................ TD- 7
CLUTCH .................................................
TD- 7
MANUAL TRANSAXLE AND TRANSFER
.... TD- 8
PROPELLER SHAFT
................................
TD-l 0
FRONT AND
REAR AXLES ....................... TD-lU
STEERING SYSTEM ................................
TD-11
BRAKING SYSTEM
..................................
TD-11
WHEELS AND TIRES
...............................
TD-12
SUSPENSION
......................................... TD-13
BODY ELECTRICAL SYSTEM
................... TD-14
STANDARD BOLT AND NUT TIGHTENING.
TORQUE ..............................................
TD-f 4
13ETOX-301
I
m I

TD TECHNICAL DATA
ENGINE (BP DOHC turbo)
Item m
Type BP DOHC turbo
Gasoline, 4-cycle
Cvlinder arranoement and number
1 In-line 4-cylinders
I
I Combustion chamber
I Pent&of
Valve system DOHC, belt-driven 16 valves
Bore x Stroke mm {in] 83.0 x 85.0 (3.27 x 3.35)
Total piston drsplacement cm3 Icu in] 1,839 {112.2)
Compression rat!0 8.2
1 Standard 1,127 111.5, t641-300
Compression pressure
kPa ( kgf/cm2, psi 1 -rpm
Valve timing Mintmum
Maximum drfference between
each cylinder
IN Open BTDC
Close ABDC
EX Open BBDC
Close ATDC ! 785 {8.CI, 114]-300
196 12.0, 28)
2*
51°
590
8*
Valve clearance
I I ---- f IN
mm linl EX I 0: Maintenance-free
0: Maintenance-free
Cylinder head
Height mm finI 133.8-l 34.0 { 5.268-5.276 1
DIstortion mm [in] 0.10 !0.004] max.
GrindIng mm [in) 0.10 {O.O04t max.
Cylrnder head-to-l-LA clearance rqm [ In] Standard 0.025-0.066 IO.001 O-0.0026 ]
Maximum 0.18 10.0071 1
Valve and valve guide
Valve head diameter
mm Ml IN 32.9-33.1 { 1.295-l -3031
27.85-28.15 ! 1.096-l .I08 I -
tN
0.025-0.060 ~0.0010-0.6024)
Valve stem-to-guide clearance mm {in] EX 0.030-0.065 (0.0012-0.0026)
Maximum
0.20 IO.008 1
Guide projection (Height “A”} mm IIn) Ex
Vslve seat 18.3-18.9 {O-720-0.744)
18.3-18.9 { 0:720-0.744 ] rem
Fanshaft -
;am height
Journal diamr
Camshaft be5
Camshaft run’
Camshaft enc
Cylinder b6
Height 1
Distortion
Grinding
Cylin’aer bore
Cylinder Borg
Piston -
Piston diams
Measured at
bore axis ant
(0.433 in) b
groove
Piston to cyi
Piston ring
ThickneSS
End gap (MJlt
Ring groove
Piston ring4
TD-2

TECHNICAL DATA TD
Hem
Camshafi
Engine
BP DOHC turbo
IN Standard
Cam height mm 1 in) Wear limrt
EX Standard
Wear llmrt
Standard
Journal diameter mm 1 In] (M.1 --NW
Out-of-round
Standard
Camshaft bearing oil clearance mm { in ] (No. f-440.5)
Maximum
Camshaft runout mm {in)
Camshaft end play mm Iin] - Standard
Maximum
Winder block
Height mm {in)
Distortion mm {in]
Grinding mm (in)
Cylinder bore diameter Standard size
mm Iin) 0.25 [ 0.010) oversize .
0.50 [ 0.020 ] oversize
Cylinder bure taper and out-of-round mm [in]
Piston
44.094 { 1.7360 ]
43.894 f 1.7281 ]
44.603 [ 1.7560)
44.403 [ t .748t ;
X940-25.965 I 1.0213-l .0222 j
0.05 (0.002] max.
0.035-0.081 [ 0.0014-0.0032 )
0.15 (0.006)
0.03 (0.0012 1 max.
0.07-O. 19 [ 0.0028-0.0075 1
0.2 IO.008 1
221.5 (8.720)
0.15 [0.006) max.
0.20 [0.008] max.
83.006-83.013 13.2679-3.2682 ]
83.256-83.263
13.2778-3.2781 ]
83.506-83.513
( 3.2876-3.2879 )
0.019 [0.0007) max.
Piston diameter Standard size 82:954-82.974 13.2659-3.2667 1
Measured at 90° to pin
bore axis and 11 .Omm
oversize 83.21 I-83.217
10.433 in] below oil ring 0.25 j 0.010 ]
13.2760-3.2763 ]
groove mm {In)
0.50 { 0.020) oversize 83.461-83,467
{ 3.2859-3.2861 )
Piston to cybnder clearance
Piston ring
mm (in) Standard 0.039-0.052 [ 0.0015-0.0020 ]
Maximum
0.15 [0.006]
Thickness mm {in] Top
Second
, Top
End gap (Measured in the cylinder) Second
mm I in 1 Oil (rail)
Maximum
TOP
Ring groove width in piston
mm (in) Second
r
Oil
Piston ring-to-ring groove clearance TOP
mm (in] Second
Maximum
Piston pin
Diameter mm {in)
Piston-to-piston pin clearance mm iin]
Connecting rod bush-to-piston pin clearance mm Iin)
Connecting rod and connecting rod bearing
Length (Center to center) mm {in] 1
Bending mm [in]
Small end bore (Bush inner diameter) mm [in)
Big end bore mm {in)
Bfg end width mm [in) 1
Standard
Connecting rod side clearance mm I in 1 Maximum I
Crankshaft
Crankshaft iunout mm {ln) 1.470-l ,495 { 0.0579-0.0589 ]
1.47-l -49 [0.0579-0.0587 )
0.15-0.30 [ 0.006-0.012 1
0.35-0.50 { 0.014-0.019 1
0.20-0.70 (0.008-0.028 )
1.0 [0.039)
1.520-I .535 f0.0598~9.0604 f
1.52-l .54 ~0.0598-0.0606)
3.02-3.04 (0.1189-0.1197 1
0.025-0.065 { 0.001 O-0.0026 ]
0.03-OXI7 (O.O012--0.0028)
._
0.15 (0.006]
19.987-l 9.993 (.0.7869-0.7871 )
-0.005-0.013 { -0.0002-0.0005 1
O.Ql O-0.027 ~0.0004-0.0011 )
m D 132.85-132.95 (5.230-5.234 1
0.075 ( 0.0030 ] max./50 I1:97 ]
20.003-20.014 ( 0.7875-0.7880 1
48.000-48.016 [ 1.8898-l 48904 ]
21.838-21.890 (0.8598-0.86t81
0.11 O-O.262 f 0.0043-0.0103 1
0.30 [0.012)
0.04 (0.0016)
mdx.
TCI rl

TD TECHNICAL DATA
LU8RlCATtON SYSTEM
Item
Lubricating method
011 pump Engine
BP DOHC turbo
Force-fed
6 . Trochoid gear
Relief pressure
kPa I kgf/cm’. psi] 343-441 [ 3.5-4.5, 50-64 1
Regulated pressure kPa { kgf/cm’ , psi ] -rpm
294-392 { 3.0-4.0, 43--57.1.3,000
Inner rotor tooth tip to outer. rotor Standard
0.02-0.16 (OJOOS-O.O063]
clearance
mm {in]
Maximum I
0.20 [ 0.0078 )
Outer rotor to body clearance
Side clearance
Oil fIl!er
, TYpe
Relief pressure differential . mm [in) Standard
Maximum
mm {in) Standard
Maximum 1
kPa’ f kgf/cm’, psi 1 0.09-0.18 ~0.00354.Ofl71]
0.22 { 0.0087 1
0.03-0.11 ~0.0012-0.0043~
0.14 {0.0055)
Full-flow, paper element
. 78-118 (0.8-1.2. 11-17) Srade
----l-in
Viscosity
num her
Item
Cooling metha
Water pump
, We
Impeller diame
Number of imf
Speed ratio -
Water seal !$
Thermostat
Jype. _
Opening terq
/Full-open
1 F&open lift
I
Antifreeze E
TD-4

TECHNICAL DATA TD
Engine
Item BP DOHC turbo
Engine oii
Total (dry engine} 4.0 14.2, 3.5)
Capacity
L IUS qt, Imp qtl Ott pan 3.6 (3.8, 3.2)
011 filter 0.17 (0.18, 0.15)
Grade API Service SD, SE, SF or SG
Above 30°C (86*F) SAE 40
O*C-40*C ~32°F-1040F 1 SAE 30
-1 OOC--2O*C [ 14OF-68OF ] SAE 2OW-20
Viscosity Above -10% [14*Fj SAE ZOW-40 or 2OW-50
number -25*C--3O*C I-1 3OF-86OF ] SAE 1 OW-30
Above -25OC (-13*F1 SAE low-40 or low-50
Below O*C (32*F] SAE 5W-30
Below -2O*C I-4*F] SAE 5W-20
COOLING SYSTEM
L
item
Zooling method - 1 Engine
BP DUHC turbo
I Water-cooled, forced crrcutation
water pump
Type
mpeller diameter
Number of impeller blades
Speed ratio
tiater seal type
rhermostat
bfpe
Opening temperature
Full-open temperature
Full-open lift mm [in)
OC (OF)
*C j*FJ
mm (in] Centrifugal, V-belt driven
75 12.95)
6
1 : 1.05
Unified mechanical seal
Wax, two-stage
Marn: 86.5-89.5 [ 788-I 93 1
Sub: 83.5-86.5 [182-i 88)
loo (212)
Main: 8.0 (0.31 1 min.
Sub: 1.5 IO.061 min.
Radbtor
Type
Cap valve opening pressure kPa { kgflcm2, psi)
Cooling circuit checkrng pressure kPa ( kgflcm2, psi 1
Cooling fan
Type
Number of blades
Outer diameter mm {in 1
Capacity w-v
Current A
Water thermoswitch
OFF-+ON “C 1°F) 1
Radiator thermoswitch
OFFdON OC (OF]
Coolant
Capacity LWS qt,
Imp qt) Coolant protection
Above -16*C (3OF]
Antifreeze solutron
.Above -26*C t-1 5*F ) -
Above -4UOC I-40°F) Corrugated fin
74-103 {0.75--1.05, 11-15)
103 11.05, 15)
Electric
5
340 (13.41
160-12
Hi: 13.3+ 10% max., Lo: 8.8+ 10% max.
97 f207)
105 [221)
6.0 16.3, 5.3)
Specific gravity at 20*C (68*f)
1.054
1.066
1.078 -.ep
1