1987 MAZDA 626 Workshop Manual

TECHNICAL DATA 30
FE 12-valve Item FE 12-valve
Valve seat

Seat angle IN 45° Seat angle EX 45°
Seat contact width mm (in) IN 1.2-1.6 (0.047-0.063) Seat contact width mm (in) EX 1.2-1.6 (0.047-0.063)
Seat sinking (Measure valve protruding length) mm (in)
IN Standard 50.2 (1.976) Seat sinking (Measure valve protruding length) mm (in)
IN Maximum 51.0 (2.008) Seat sinking (Measure valve protruding length) mm (in) EX Standard 50.2 (1.976)
Seat sinking (Measure valve protruding length) mm (in) EX Maximum 51.0 (2.008)

Valve spring

IN Standard 49.5 (1.949)
Free length
mm
(in)
IN Minimum 49.0 (1.929) Free length
mm
(in)
EX Standard 50.4 (1.984) EX Minimum 48.7 (1.917)
Out-of-square mm (in) Maximum 1.8 (0.071)
Setting load/height
N
(kg, lb)/mm (in) IN 203-230 (20.7-23.4, 45.5-51,5)/41 (1.614) Setting load/height
N
(kg, lb)/mm (in) EX 240-272 (24.5—27.7, 53.9-60.9)/41 (1.614)

Camshaft

IN Standard 41.290-41.390 (1.6256-1.6295)
Cam lobe height
mm
(in)
IN Minimum 41.140 (1.6197) Cam lobe height
mm
(in)
EX Standard 41.797-41.897 (1.6455—1.6495) EX Minimum 41.647 (1.6396)
Front and Rear (No.
1,5)
31.940-31.965 (1.2575-1.2585)
Journal diameter
mm (in)
Center (No. 2,3,4) 31.910-31.935 (1.2563-1.2573)
Out-of-round Maximum 0.05 (0.002)
Camshaft bearing
oil

clearance
mm
(in)
Front and Rear (No.
1,5)
0.035—0.085 (0.0014-0.0033) Camshaft bearing
oil

clearance
mm
(in) Center (No. 2,3,4) 0.065-0.115 (0.0026-0.0045) Camshaft bearing
oil

clearance
mm
(in) Maximum 0.15 (0.0059)
Camshaft runout mm (in) Maximum 0.03 (0.0012)
Camshaft end play mm (in) Standard 0.08-0.16 (0.003—0.0061 Camshaft end play mm (in) Maximum 0.20 (0.008)

Rocker arm and rocker arm shaft

Rocker arm inner diameter mm (in) 19.000—19.033 (0.748—0.749)
Rocker arm shaft diameter mm (in) 18.959-18.980 (0.746-0.747)
Rocker arm
to
shaft clearance mm (in) Standard 0.020-0.074 (0.0008-0.0029) Rocker arm
to
shaft clearance mm (in) Maximum 0.10 (0.004)

Cylinder block

Height mm (in) 289.0 (11.38)
Distortion mm (in) Maximum 0.15 (0.006)
Grinding limit mm (in) 0.20 (0.008)
Cylinder bore diameter
mm (in)
Standard 86.000—86.019 (3.3858-3.3866) Cylinder bore diameter
mm (in) 0.25 (0.010) oversize 86.250-86.269 (3.3957-3.3964) Cylinder bore diameter
mm (in) 0.50 (0.020) oversize 86.500-86.519 (3.4055-3.4062)
Cylinder bore taper and out-of-round mm (in) Maximum 0.019 (0.0007)

Piston

Piston diameter measured at 90°
to
pin bore axis and 18.0 mm (0.709
in)
below oil ring groove
mm (in)
Standard 85.944-85.964 (3.3836-3.3844) Piston diameter measured at 90°
to
pin bore axis and 18.0 mm (0.709
in)
below oil ring groove
mm (in)
0.25 (0.010) oversize 86.194-86.214 (3.3935—3.3942)
Piston diameter measured at 90°
to
pin bore axis and 18.0 mm (0.709
in)
below oil ring groove
mm (in) 0.50 (0.020) oversize 86.444-86.464 (3.4033—3.4041)
Piston
to
cylinder clearance mm (in) Standard 0.036-0.075 (0.0014-0.0030) Piston
to
cylinder clearance mm (in) Maximum 0.15 (0.0059)

Piston ring

Thickness mm (in)
TOD
1.47-1.49 (0.0579—0.05871 Thickness mm (in) Second 1.47-1.49 (0.0579-0.0587)

30-3

30 TECHNICAL DATA
Item Engine model FE 12-valve

Top 0.20—0.35 (0.008-0.0138)
End gap measured
in
cylinder
mm
(in) Second 0.15—0.30 (0.006-0.012) End gap measured
in
cylinder
mm
(in) Oil (rail) 0.20-0.70 (0.008-0.0276)
Maximum 1.0 (0.039)
Top 1.52-1.54 (0.0598-0.0606)
Ring groove width
in
piston mm (in) Second 1.52-1.54 (0.0598-0.0606)
Oil 4.02-4.04 (0.1583-0.1591)
Top 0.03—0.07 (0.0012—0.0028) Clearance
ot
piston ring
to
ring Second 0.03—0.07 (0.0012-0.0028)
Maximum 0.15(0.006)

Piston pin

Diameter mm (in) 21.974-21.980 (0.8651-0.8654)
Interference
in
connecting
rod
mm (in) 0.013-0.037 (0.0005-0.0015)
Piston
to
piston pin clearance mm (in) 0.008-0.024 (0.0003—0.0009)
Installation pressure N (kg,
lb)
4,900-14,700 (500-1,500, 1,100-3,300)

Connecting rod and connecting rod bearing

Length (Center
to
center) mm (in) 151.95—152.05 (5.982—5.986)
Twisting and bending mm (in) 0.06 (0.0024) max.
Small end bore mm (in) 21.943—21.961 (0.8640-0.8646)
Big end bore mm (in) 54.002-54.017 (2.1261—2.1266)
Big end width mm (in) 26.838-26.890 (1.0566—1.0587)
Connecting rod side clearance
mm
(in) Standard 0.110-0.262 (0.004-0.010) Connecting rod side clearance
mm
(in) Maximum 0.30 (0.012)

Crankshaft

Crankshaft runout mm (in) Maximum 0.03 (0.0012)
Standard size 59.937-59.955 (2.3597—2.3604)
0.25 (0.010) Standard 59.693-59.711 (2.3501-2.3508)
Main journal diameter mm (in)
undersize No.3 59.687-59.705 (2.3499-2.3506) Main journal diameter mm (in) 0.50 (0.020) No. 1,2,4,5 59.443-59.461 (2.3403-2.3410) Main journal diameter mm (in) undersize No.
3
59.437-59.455 (2.3400-2.3407)
0.75 (0.030) No. 1,2,4,5 59.193-59.211 (2.3304-2.3311)
undersize No.
3
59.187-59.205 (2.3302-2.3309)
Main journal taper and out-of-round mm (in) Maximum 0.05 (0.0020)
Standard 50.940-50.955 (2.0055-2.0061)
Crankpin diameter 0.25 (0.010) undersize 50.690—50.705 (1.9957-1.9963)
mm (in) 0.50 (0.020) undersize 50.440-50.455 (1.9858-1.9864)
0.75 (0.030) undersize 50.190-50.205 (1.9760-1.9766)
Crankpin taper and out-of-round
mm (in)
Maximum 0.05 (0.0020)

Main bearing

No. 1,2,4,5 Standard 0.025-0.043 (0.0010—0.0017)
Main journal bearing
oil
No. 1,2,4,5 Maximum 0.08 (0.0031) clearance
mm
(in) No.
3
Standard 0.031—0.049 (0.0012—0.0019) No.
3
Maximum 0.08 (0.0031)
Available undersize bearing mm fin} 0.25 (0.010), 0.50 (0.020), 0.75 (0.030)

Crankpin bearing

Crankpin bearing
oil
clearance
mm
(in) Standard 0.027-0.067 (0.0011-0.0026) Crankpin bearing
oil
clearance
mm
(in) Maximum 0.10 (0.0039)
Available undersize bearina mm (in) 0.25 (0.010), 0.50 (0.020), 0.75 (0.030)

Thrust bearing (center main bearing)

Crankshaft end play mm (in) Standard 0.08-0.18 (0.0031-0.0071) Crankshaft end play mm (in) Maximum 0.30 (0.0118)
Standard 27.94-27.99 (1.100-1.102)
Bearing width
mm (in)
0.25 (0.010) oversize 28.04-28.09 (1.104-1.106) Bearing width
mm (in)
0.50 (0.020) oversize 28.12-28.17 (1.107-1.109)
0.75 (0.030) oversize 28.20—28.25 (1.110—1.112)

30—4

TECHNICAL DATA 30
" Engine model Item FE 12-valve
Timing belt

Belt deflection
mm
(in)/98
N
(10 kg,
22 lb)
5.5—6.5 (0.22-0.26)

8-valve
Engine model
Item -••--.
FE 8-valve F8
F6
Engine model
Item -••--. ECE Middle
East
General
ECE General F6

Type Gasoline, 4-cycle
Cylinder arrangement and number In-line, 4-cylinders
Type
of
combustion chamber Multispherical
Valve system OHC, belt-driven
Bore
x
Stroke
mm
(in) 86.0
x
86.0 (3.39
x
3.39) 86.0
x
77.0
(3.39
x
3.03)
81.0
x
77.0 (3.19
x
3.03)
Total piston displacement
cc
(cu
in)
1,998 (121.9) 1,789 (109.1) 1,587 (96.8)
Compression ratio 8.6
: 1
9.0
: 1

Compression pressure kPa (kg/cm2, psi)-rpm
Standard 1,275 (13.0, 185)—270 1,128 (11.5, 164)—270
Compression pressure kPa (kg/cm2, psi)-rpm Minimum 893 (9.1, 129)—270 790 (8.1, 114)—270 Compression pressure kPa (kg/cm2, psi)-rpm Maximum difference
between cylinders 196 (2.0,
28)

Valve timing
IN Open BTDC 16° 20° 17°
Valve timing
IN Close ABDC 54° 65° 56° Valve timing
EX Open BBDC 54° 65° 64° Valve timing
EX Close ATDC 16° 20° 15°
Valve clearance
mm
(in) IN 0.30 (0.012) Valve clearance
mm
(in) EX 0.30 (0.012)

Cylinder head

Height
mm (in)
91.95-92.05 (3.620-3.624)
Distortion
mm
(in) Maximum 0.15 (0.006)
Grinding limit mm (in) Maximum 0.20 (0.008)

Valve and valve guide

Valve head diameter
mm
(in) IN 43.9-44.1 (1.728-1.736) Valve head diameter
mm
(in) EX 35.9-36.1 (1.413-1.421)
Valve head thickness (margin)
mm
(in) IN 0.8—1.2 (0.031-0.047) Valve head thickness (margin)
mm
(in) EX 1.3-1.7 (0.051-0.067)
Valve face angle IN 45° Valve face angle EX 45°
Valve length
mm
(in)
IN Standard 111.89 (4.4051)
Valve length
mm
(in)
IN Minimum 111.39 (4.3854) Valve length
mm
(in)
EX Standard 111.69 (4.3972) Valve length
mm
(in)
EX Minimum 111.19 (4.3776)
Valve stem diameter
mm
(in) IN 8.030-8.045 (0.3161-0.3167) Valve stem diameter
mm
(in) EX 8.025-8.040 (0.3159-0.3165)
Guide inner diameter
mm
(in) IN 8.07-8.09 (0.3177-0.3185) Guide inner diameter
mm
(in) EX 8.07-8.09 (0.3177-0.3185)
Valve stem
to
guide clearance
mm
(in)
IN 0.025-0.060 (0.0010-0.0024)
Valve stem
to
guide clearance
mm
(in) EX 0.030-0.065 (0.0012-0.0026) Valve stem
to
guide clearance
mm
(in)
Maximum 0.20 (0.0079)
Guide projection (Height "A")
mm
(in) 19.1-19.6 (0.752-0.772)

30-5

30 TECHNICAL DATA
Engine model FE 8-valve
Item ECE Middle East General
F8 F6
Valve seat

Seat angle IN 45° Seat angle EX 45°
Seat contact width mm (in) IN 1.2—1.6 (0.047-0.063) Seat contact width mm (in) EX 1.2-1.6 (0.047-0.063)
Seat sinking (Measure valve protruding length)
mm (in)
IN Standard 46.5 (1.831) Seat sinking (Measure valve protruding length)
mm (in)
IN Maximum 48.0 (1.890) Seat sinking (Measure valve protruding length)
mm (in) EX Standard 46.5 (1.831)
Seat sinking (Measure valve protruding length)
mm (in) EX Maximum 48.0 (1.890)

Valve spring

Free length mm (in)
Outer
Inner
Standard
Minimum
51.5(2.028)

Standard
44.0 (1.732)

Minimum
43.3 (1.705)
51.2 (2.016)
52.0 (2.047)

50.6 (1.992)
51.5 (2.028)

45.7 (1.799)
44.0 (1.732)

437 (1.720)1
43.3 (1.705)
Out-of-square mm (in) Maximum 1.8 (0.071)
Setting load/height
N
(kg, lb)/mm
(in)
Outer
128(13.1,29) 136.5
(1
44)

Inner
189 (19,2, 42) 141 (1.61)
124 (12.7, 28) 136.5
(1
44)
193 (19.6,43) 141 (1.61)

128 (13.1, 29)/36.5 (1.44)
189 (19.2, 42)/41 (1.61)

Camshaft

Cam lobe height
mm (in)

IN
EX
Standard
Minimum
Standard
Minimum
38.107-38.207 (1.5003-1.5042)
37.957 (1.4944)
38.110-38.210 (1.5004-1.5043)
37.960 (1.4945)
Journal diameter
mm (in)

Front and Rear (No.
1,5)
31.940-32.035 (1.2575-1.2612)
Center (No. 2,3,4)
Out-of-round Maximum
31.910-32.065 (1.2563-1.2624)
0.05 (0.002)
Camshaft bearing
oil
clearance
mm (in)

Front and Rear (No.
1,5)
0.035-0.085 (0.0014-0.00331
Center (No. 2,3,4) 0.065-0.115 (0.0026—0.0045)
Maximum 0.15 (0.0059)
Camshaft runout mm (in) Maximum 0.03 (0.00121
Camshaft end play mm (in) Standard 0.08—0.16 (0.003—0.006)

Maximum 0.20 (0.008)
Rocker arm and rocker arm shaft

Rocker arm inner diameter mm (in) 16.000-16.027 (0.6299-0.6310)
Rocker arm shaft diameter mm (in) 15.966-15.984 (0.6286-0.6293)
Rocker arm
to
shaft clearance
mm (in)
Standard 0.016—0.061 (0.0006-0.0024)
Maximum 0.10 (0.004)

Cylinder block

Heiaht mm
fin)
289.0 (11.38) 268.5 (10.57)
Distortion mm (in) Maximum 0.15 (0.006)
Grindina limit mm (in)
0.20 (0.008)

Cylinder bore diameter
mm (in)
Standard 86.000—86.019 (3.3858—3.3866)
0.25 (0.010) oversize 86.250-86.269 (3.3957-3.3964)
0.50 (0.020) oversize 86.500-86.519 (3.4055-3.4062)
0.75 (0.030) oversize
1.00 (0.039) oversize

81.000-
(3.1890-
-81.019 -3.1897)
81.250-(3.1988-
-81.269
-3.1996) 81.500-(3.2087-
-81.519 -3.2094)
81.750-(3.2185-
-81.769
-3.2192)

82.000-

(3.2283-
-82.019
-3.2291)
Cylinder bore taper and out-of-round mm (in) Maximum 0.019 (0.0007)

Piston

Piston diameter measured at 90°
to pin
bore axis and 18.0
mm
(0.709
in)
below
oil
ring groove
mm (in)
Standard 85.944-85.964 (3.3836—3.3844) 80.944-80.964
(3.1868—3.1876) Piston diameter measured at 90°
to pin
bore axis and 18.0
mm
(0.709
in)
below
oil
ring groove
mm (in)
0.25 (0.010) oversize 86.194—86.214 (3.3935—3.3942) 81.194—81.214
(3.1966-3.1974)
Piston diameter measured at 90°
to pin
bore axis and 18.0
mm
(0.709
in)
below
oil
ring groove
mm (in) 0.50 (0.020) oversize 86.444-86.464 (3.4033-3.4041) 81.444-81.464
(3.2065-3.2072)

30—6