1987 MAZDA 626 torque

1 A ON-VEHICLE MAINTENANCE (CYLINDER HEAD)
Installation note
Cylinder head
1. Thoroughly remove all dirt and oil from the top of
the cylinder block with a rag.
2. Place a new cylinder head gasket in position.
86U01X-035
® (5)
CD
© (8)
3. Set the cylinder head in place.
4. Apply engine oil to the bolt threads and seat faces.
5. Tighten the cylinder head bolts in two or three steps
in the order shown in the figure.
Tightening torque:
80—86 N-m (8.2—8.8 m-kg, 59—64 ft-lb)
86U01X-036
Cylinder head cover
1. Apply silicon sealant to the shaded area shown in
the figure.
2. Install the cylinder head cover.
Tightening torque:
6—8
N
m (60—80 cm-kg, 52—69 in-lb)
86U01X-037
Timing belt
1. Align the mating mark of the camshaft pulley with
the front housing timing mark.
Note
For FE engine, align "2" mark.
For F8, F6 engine, align "3" mark.
2. Install the timing belt. (Refer to TIMING BELT of
ON-VEHICLE MAINTENANCE.)
76G01A-034
1A—24

1 A ON-VEHICLE MAINTENANCE (VALVE SEAL)
Installation
Install in the reverse order of removal referring to the installation note.
Torque Specifications

16—27 N-m (1.6—2.8 m-kg, 12—20 ft-lb)

76G01A-115
1A—29

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
© © (D ® (5) © © ®
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