1987 MAZDA 626 Workshop Manual

ASSEMBLY (CYLINDER HEAD) 1A
CYLINDER HEAD (12-valve)
Torque Specifications
19—25 N.m (1.9—2.6 m-kg, 14—19 ft-lb) 18—26 N-m (1.8—2.7 m-kg, 13—20 ft-lb)
80—86 N-m (8.2—8.8 m-kg, 59—64 ft-lb)
19—25 N-m (1.9—2.6 m-kg, 14—19 ft-lb)
76G01A-077
Valve Seal
1. Apply engine oil to the inside of the new valve seal.
2. Install the valve seal onto the valve guide with the
SST
86U01X-143

1
A—73

ASSEMBLY (CYLINDER HEAD) 1 A
86U01X-144
Valve and Valve Spring
1. Install the lower spring seat.
2. Install the valve.
3. Install the valve springs and the upper spring seat.
Note
Install the valve spring with the closer pitch
toward the cylinder head.
4. Compress the valve spring with the SST; then in-
stall the valve keepers.
5. Tap the end of the valve stem lightly two or three
times with a plastic hammer to confirm that the
keepers are all fully seated.
Cylinder Head
1. Thoroughly remove all dirt, oil, or other material
from the top of the cylinder block.
2. Place the new cylinder head gasket in position.
3. Install the cylinder head.
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 Nm (8.2—8.8 m-kg, 59—64 ft-lb)
1A—74

ASSEMBLY (CYLINDER HEAD) 1 A
86U01X-148
86U01X-149
86U01X-150
Camshaft
1. Apply a liberal amount of engine oil to the journals
and bearings.
2. Place the camshaft in position with the dowel pin
facing straight up.
Hydraulic Lash Adjuster (HLA)
1. Pour engine oil into the oil reservoir in the rocker
arm.
2. Apply engine oil to the new HLA.
3. Carefully install the HLA into the rocker arm.
Caution
Be careful not to damage the O-ring when in-
stalling the HLA.
Camshaft Cap, Rocker Arm and Shaft Assembly
1. Assemble the rocker arm and shaft assembly as
shown in the figure.
Note
a) The intake side shaft has twice as many oil
holes as the exhaust side shaft.
b)The stepped ends are the rear of the shafts.
2. Apply silicon sealant to the shaded areas shown
in the figure.
76G01A-140

1 A—75

ASSEMBLY (CYLINDER HEAD) 1 A
3. Apply liberal amount of clean engine oil to the cam
lobes and journals.
4. Position the camshaft caps according to the
mark.
Note
The No. 3 camshaft cap has an oil passage
from the cylinder head, be certain it is in-
stalled correctly.
5. Install the rocker arm and shaft assemblies. Tight-
en the bolts in two or three steps in the order shown
in the figure.
Tightening torque:
18—26 Nm (1.8—2.7 m-kg, 13—20 ft-lb)
Oil passage
86U01X-152
86U01X-153
Caution
Be careful that the rocker arms or spacers do
not get caught between the shaft and cam-
shaft cap.
86U01X-154
Front Housing
1. Apply engine oil to the front housing and a new
oil seal.
2. Press the oil seal into the front housing.

86U01X-147

1A—76

ASSEMBLY (CYLINDER HEAD) 1 A
3. Apply engine oil to the oil seal lip.
4. Install the front housing and a new gasket.
Tightening torque:
19—25 Nm (1.9—2.6 m-kg, 14—19 ft-lb)
86U01X-156
Rear Housing
Install the rear housing and a new gasket.
Tightening torque:
19—25
N
m (1.9—2.6 m-kg, 14—19 ft-lb)
86U01X-157
1A—77

ASSEMBLY (CYLINDER HEAD) 1 A
CYLINDER HEAD (8-valve)
Torque Specifications
19-25 N m (1.9—2.6 m-kg. 14-19 ft-lb)
18—26 N m (1.8—2.7 m-kg, 13—20 tt-lb)
80—86 N-m (8.2—8.8 m-kg, 59—64 ft-lb)
19—25 N-m (1.9—2.6 m-kg, 14—19 ft-lb)
76G01A-078
Valve Seal
1. Apply engine oil to the inside of the new valve seal.
2. Install the valve seal onto the valve guide with the
SST

86U01X-147

1A—78

ASSEMBLY (CYLINDER HEAD) 1 A
Outer valve spring
®
®
Cylinder head r
Side ®>d)
76G01A-079
86U01X-145
86U01X-146
© @ ® ©
© ® © ®
Valve and Valve Spring
1. Install the lower spring seat.
2. Install the valve.
3. Install the valve springs and the upper spring seat.
Note
Install the outer valve spring with the closer
pitch toward the cylinder head.
4. Compress the valve spring with the SST; then in-
stall the valve keepers.
5. Tap the end of the valve stem lightly two or three
times with a plastic hammer to confirm that the
keepers are all fully seated.
Cylinder Head
1. Thoroughly remove all dirt, oil, or other material
from the top of the cylinder block.
2. Place the new cylinder head gasket in position.
3. Install the cylinder head.
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-147
1A—79

1 A ASSEMBLY (CYLINDER HEAD)
Camshaft
1. Apply a liberal amount of engine oil to the journals
and bearings.
2. Place the camshaft in position with the dowel pin
facing straight up.
Rocker Arm and Shaft Assembly
1. Assemble the rocker arm and shaft assembly as
shown in the figure.
2. Apply silicon sealant to the shaded areas shown
in the figure.
3. Apply liberal amount of clean engine oil to the cam
lobes and journals.
5. Install the rocker arm and shaft assembly. Tighten
the bolts in two or 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-081
76G01A-082
1A—80