torque MAZDA 626 1987 User Guide

ON-VEHICLE MAINTENANCE (VALVE SEAL) 1 A
Camshaft
1. Apply sealant to the shaded areas as shown in the
figure.
76G01A-041
2. Apply engine oil to the camshaft journals.
3. Install the camshaft with its dowel pin upward.
76G01A-042
12-valve
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Rocker arm and shaft assembly
(12-valve)
1. Install the camshaft caps.
2. Install the rocker arm and shaft assemblies on the
cylinder head, and tighten them in three steps in
the order shown in the figure.
Tightening torque:
18—26 Nm (1.8—2.7 m-kg, 13—20 ft-lb)
76G01A-043
Caution
Be careful that the rocker arms or spacers do
not get caught between the shaft and cam-
shaft cap.
86U01X-052
1A—31

ON-VEHICLE MAINTENANCE (VALVE SEAL) 1 A
76G01A-044
86U01X-212
76G01A-045
(8-valve)
Install the rocker arm and shaft assemblies on the cyl-
inder head and tighten them in three steps in the or-
der shown in the figure.
Tightening torque:
18—26 N-m (1.8—2.7 m-kg, 13—20 ft-lb)
Front housing
1. Replace the oil seal in the front housing.
2. Apply engine oil to the oil seal lip.
3. Install the front housing along with a new gasket.
Tightening torque:
19—25 N-m (1.9—2.6 m-kg, 14—19 ft-lb)
Rear housing
Install the rear housing along with a new gasket.
Tightening torque:
19—25 N-m (1.9—2.6 m-kg, 14—19 ft-lb)
Camshaft pulley
1. Install the camshaft pulley so that the mating mark
is aligned with the camshaft dowel pin straight up.
Note
For FE engine, align "2" mark.
For F8, F6 engine, align "3" mark.
2. Tighten the lock bolt.
Tightening torque:
47—65 N-m (4.8—6.6 m-kg, 35—48 ft-lb)
Timing belt
Install the timing belt. (Refer to TIMING BELT of ON-
VEHICLE MAINTENANCE.)

86U01X-052

1A—32

1 A ON-VEHICLE MAINTENANCE (VALVE SEAL)
Valve clearance (8-valve)
Adjust the valve clearance. (Refer to page
1
A—10.)
Cylinder head cover
1. Apply silicon sealant to the shaded areas shown
in the figure.
2. Install the cylinder head cover.
Tightening torque:
6—8 N-m (60—80 cm-kg, 52—69 in-lb)
76G01A-116
Distributor
1. Apply engine oil to the O-ring, and position it on
the distributor.
2. Apply engine oil to the blade or gear.
3. Align the mating marks as shown in the figure
...8-valve.
4. Install the distributor with the marks facing straight
up.
5. Loosely tighten the distributor mounting bolt.
76G01A-035
Steps After Installation
1. Fill the radiator with the specified amount and type
of coolant.
2. Perform the necessary engine adjustments. (Re-
fer to TUNE-UP PROCEDURE.)
86U01X-055
1A—33

DISASSEMBLY (CYLINDER BLOCK) 1 A
Main bearing cap
Before removing the main bearing caps, clean the
bearings, main journals, and caps, and measure the
following points.
1. Crankshaft end play. (Refer to page 1A—66.)
2. Main journal oil clearance. (Refer to page
1
A—65.)
76G01A-054
Pilot bearing (MTX)
Remove the pilot bearing from the crankshaft with the
SST.
86U01X-076
Piston and connecting rod
1. Before disassembling the piston and connecting
rod, check the oscillation torque as shown in the
figure.
If the large end does not drop by its own weight,
replace the piston or the piston pin.
79G01C-050
2. Remove the piston pin with the SST.
While removing the piston pin, check the pressure.
If it is lower than 5kN (500kg, 1,100 lb), replace
the piston pin or connecting rod.

76G01A-139

1A—47

INSPECTION AND REPAIR 1 A
mjjm
H D f IT~inr
86U01X-095
5. Measure the oil clearance of the camshaft and
camshaft caps.
(1) Remove any oil, or dirt from the journals and
bearing surface.
(2) Set the camshaft onto the cylinder head.
(3) Position plasti-gauge on top of the journals in
the axial direction.
(4) Place the camshaft caps and rocker arm shafts
in position, and tighten them to the specified
torque.
Tightening torque:
18—26
N
m (1.8—2.7 m-kg, 13—20 ft-lb)
(5) Remove the camshaft caps and measure the
oil clearance at each cap.
Oil clearance
Front and rear:
0.035—0.085 mm (0.0014—0.0033 in)
Center three journals:
0.065—0.115 mm (0.0026—0.0045 in)
Maximum: 0.15 mm (0.0059 in)
(6) If the oil clearance exceeds the maximum, re-
place the cylinder head.
86U01X-096
6. Measure the camshaft end play. If it exceeds the
maximum, replace the camshaft and/or the cylin-
der head.
End play:
0.08—0.16 mm (0.003—0.006 in)
Maximum: 0.20 mm (0.008 in)
86U01X-097

76G01A-131

1A—54
Rocker Arm and Rocker Arm Shaft
1. Check for wear or damage to the contact surface
of the rocker arm shaft and the rocker arm. Re-
place if necessary.
2. Check the oil clearance between the rocker arm
and shaft. Replace if necessary.
(1) Measure the rocker arm inner diameter.
Diameter:
19.000—19.033 mm (0.7480—0.7493 in)
...12-valve
16.000—16.027 mm (0.6299—0.6310 in)
... 8-valve

1 A ASSEMBLY (CYLINDER BLOCK)
ASSEMBLY
1. Clean all parts before reinstallation.
2. Apply new engine oil to all sliding and rotating parts.
3. Replace plain bearings if they are peeling, burned, or otherwise damaged.
4. Tighten all bolts and nuts to the specified torques.
Caution
Do not reuse gaskets or oil seals.
CYLINDER BLOCK—I
Torque Specifications
69G01A-139
1A—62

ASSEMBLY (CYLINDER BLOCK) 1 A
Connecting Rod
1. Assemble the SST to the piston pin.
2. Apply engine oil to the piston pin.
86U01X-118
3. Set the piston on the SST with the F mark facing
upward.
4. Set the connecting rod in piston with the oil hole
in the large end opposite the F mark.
76G01A-135
5. Press the piston pin into the piston and connect-
ing rod until the SST contacts the block.
While inserting the piston pin, check the pressure
force. If it is less than specified, replace the piston
pin or the connecting rod.
Press force:
5—15 kN (500—1,500 kg, 1,100—3,300 lb)
Check the oscillation torque of the connecting rod.
(Refer to page 1A—47.)
76G01A-072
Piston Ring
1. Install the three-piece oil rings on the pistons.
(1) Apply engine oil to the oil ring spacer and rails.
(2) Install the oil ring spacer so that the opening
faces upward.
(3) Install the upper rail and lower rail.
Note
a) The upper rail and lower rail are the same.
b) Each rail can be installed with either face
upward.
69G01A-144
1A—63

ASSEMBLY (CYLINDER BLOCK) 1 A
86U01X-122
UJlJt^LM
.•I
86U01X-123
76G01A-073
Oil clearance inspection
(1) Remove any foreign material and oil from the
journals and bearings.
(2) Install the upper main bearings in the cylinder
block.
(3) Set the crankshaft into the cylinder block.
(4) Position the plasti-gauge on top of the journals
in the axial direction.
(5) Install the main bearing caps along with the
lower main bearings according to the cap num-
ber and ^ mark.
(6) Tighten the caps in two or three steps in the
order in the figure.
Tightening torque:
82—88 N-m (8.4—9.0 m-kg, 61—65 ft-lb)
Caution
Do not rotate the crankshaft when measuring
the oil clearances.
(7) Remove the main bearing caps, and measure
the plasti-gauge at each journal at the widest
point for the smallest clearance, and at the nar-
rowest point for the largest clearance.
If the oil clearance exceeds specification, grind
the crankshaft and use undersize main bear-
ings. (Refer to page 1A—59.)
Oil clearance
No. 1, 2, 4, 5:
0.025—0.043 mm (0.0010—0.0017 in)
No. 3:
0.031—0.049 mm (0.0012—0.0019 in)
Maximum: 0.08 mm (0.0031 in)
2. Apply a liberal amount of engine oil to the main
bearings and main journals.
3. Install the crankshaft and the main bearing caps
according to the cap number and mark.

86U01X-130

1A—65

ASSEMBLY (CYLINDER BLOCK) 1 A
69G01B-137
Matin
76G01A-075
69G01B-139
Connecting Rod Cap
1. Check the connecting rod bearing clearances us-
ing the same procedure as used for the main bear-
ing oil clearance.
Connecting rod cap tightening torque:
65—69 Nm (6.6—7.0 m-kg, 48—51 ft-lb)
Oil clearance:
0.027—0.067 mm (0.0011—0.0026 in)
Maximum: 0.10 mm (0.0039 in)
Caution
Align the alignment marks on the cap and on
the connecting rod when installing the con-
necting rod cap.
If the oil clearance exceeds specification, grind the
crankshaft and use undersize bearings. (Refer to
page 1A—59.)
3. Check the side clearance of each connecting rod
without the cap installed.
Side clearance:
0.110—0.262 mm (0.004—0.0103 in)
Maximum: 0.30 mm (0.012 in)
If the clearance exceeds the maximum, replace the
connecting rod.
4. Apply a liberal amount of engine oil to the crank-
pin journal and connecting rod bearing.
5. Install the connecting rod cap with the alignment
marks aligned.
Tightening torque:
65—69 Nm (6.6—7.0 m-kg, 48—51 ft-lb)
86U01X-130
1A—67

1 A ASSEMBLY (CYLINDER BLOCK)
CYLINDER BLOCK—II
Torque Specifications
ATX
MS: Smaller 19—25 N-m (1.9—2.6 m-kg, 14—19 ft-lb)
M10: Bigger 37—52 N-m (3.8—5.3 m-kg, 27—38 ft-lb)
96—103 N-m (9.8—10.5 m-kg, 71—76 ft-lb)
69G01A-166
Rear Cover
1. Apply engine oil to the rear cover, oil seal and oil
seal lip.
2. Press the oil seal into the rear cover.
4BG01A-158
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