1987 MAZDA 626 light

INSPECTION AND REPAIR 1 A
86U01X-082
Valve guide
Cylinder head
76G01A-057
(2) Method No. 2
Measure the valve stem play at a point close
to the valve guide with the valve lifted slightly
off the valve seat.
Clearance
IN : 0.025—0.060 mm (0.0010—0.0024 in)
EX: 0.030—0.065 mm (0.0012—0.0026 in)
Maximum: 0.20 mm (0.0079 in)
7. If the clearance exceeds the maximum, replace the
valve and/or valve guide.
8. Check that the valve guide projection height
(dimension A in the figure). Replace if necessary.
Height:
19.8—20.3 mm (0.780—0.799 in)... 12-valve
19.1—19.6 mm (0.752—0.772 in)...8-valve
Replacement of valve guide
Note
Although the shapes of the intake and exhaust
valve guides are different, use the exhaust
valve guide on both sides as a replacement.
86U01X-214
Removal
1. Gradually heat the cylinder head in water to ap-
prox. 90°C (194°F).

76G01A-131

1A—50

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
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

1A INSTALLATION
76G01A-147
86U01X-199
86U01X-200
Radiator
1. Install the radiator and cooling fan.
Tightening torque:
8—11 N-m (80—110 cm-kg, 69—95 in-lb)
2. Connect the radiator harness.
3. Connect the ATF hoses (ATX).
4. Connect the upper and lower radiator hoses.
Note
a) Position the hose clamp in the original lo-
cation on the hose.
b) Squeeze the clamp lightly with large pliers
to ensure a good fit.
Heater Hose and Fuel Hose
Connect the heater hoses and the fuel hoses.
High-Tension Lead
Connect the high-tension lead to the ignition coil.
Accelerator Cable
Install the accelerator cable and the throttle cable
(ATX).
76G01A-148
Battery and Battery Carrier
1. Install the battery carrier.
Tightening torque:
9—13 N-m (90—130 cm-kg, 78—113 in-lb)
2. Install the fuse box.
Tightening torque:
8—11 N-m (80—110 cm-kg, 69—95 in-lb)
3. Install the battery tray and battery.
Tightening torque:
5_7 Nm (50—70 cm-kg, 43—61 in-lb)
1A—98

TUNE-UP PROCEDURE 1 B
High-Tension Lead
Check the following points. Clean or replace if
necessary.
1. Damaged lead
2. Carbon deposits
86U01X-014
i^rrr ' /
49 0187 280
76G01B-011
76G01B-012
Hydraulic Lash Adjuster (HLA)
Note
Tappet noise may occur if the engine is not
operated for an extended period of time. The
noise should stop after the engine has
reached normal operating temperature.
1. Check for tappet noise. If noise exists, check the
following points.
(1) Engine oil condition and level
(2) Engine oil pressure (Refer to Section 2A)
2. If the noise does not stop, check for movement of
each HLA by pushing it during disassembly.
3. If the HLA moves, replace the HLA. (Refer to page
1B—60.)
Ignition Timing
1. Warm up the engine and run it at idle.
2. Turn all electric loads OFF.
3. Connect a timing light tester.
4. Disconnect the vacuum hose from the vacuum
control, and plug the hose.
5. Check that the ignition timing mark (yellow) on the
crankshaft pulley and the timing mark on the tim-
ing belt cover are aligned.
Ignition timing: 12° ± 1° BTDC
(at idle speed)

76G01B-008

1B—8

1 B ON-VEHICLE MAINTENANCE (CYLINDER HEAD)
Installation
Install in the reverse order of removal referring to the installation note.
Note a) Position the hose clamp in the original location on the hose.
b) Squeeze the clamp lightly with large pliers to ensure a good fit.
Torque Specifications
8—12 N-m (80—120 cm-kg, 69—104
4—6 N-m (40—60 cm-kg, 35—52 in
15—23 N-m (1.5—2.3 m-kg, 11—17 ft-lb)
7—10 N-m (70—100 cm-kg, 61—87 In-lb)
—11 N-m (80—110 cm-kg, 69—95 In-lb)
37—52 N-m (3.8—5.3 m-kg. 27—38 ft-lb)
80—86 N-m (8.2—8.8 m-kj, 59—64 ft-lb)
~t/—- -19—30 N-m (1.9—3.1 m-kg, g^ 14-22 ft-lb)

\34—44
N-m (3.5—4.5 m-kg, ' 25—33 ft-lb)
19-30 N-m (1.9—3.1 m-kg, 14—22 ft-lb)
19—30 N-m (1.9—3.1 m-kg, 14—22 ft-lb)
37—52 N-m (3.8—5.3 m-kg, 27—38 ft-lb)
76G01A-112
1B—19

1 B ASSEMBLY (CYLINDER HEAD)
Valve spring
®>®
Cylinder head side
76G01B-084
86U01X-145
76G01B-085
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 and inner 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.
Hydraulic Lash Adjuster (HLA)
1. Apply engine oil to the sliding surface.
2. Install the HLA in the position from which they were
removed.
3. Check for free movement.
76G01B-086
1B—60

1B INSTALLATION
76G01B-113
76G01B-114
76G01B-115
Radiator
1. Install the radiator and cooling fan.
Tightening torque:
8—11 N-m (80—110 cm-kg, 69—95 in-lb)
2. Connect the radiator harness.
3. Connect the upper and lower radiator hoses.
Note
a) Position the hose clamp in the original lo-
cation on the hose.
b) Squeeze the clamp lightly with large pliers
to ensure a good fit.
Heater Hose and Fuel Hose
Connect the heater hoses and the fuel hoses.
High-Tension Lead
Connect the high-tension lead to the ignition coil.
Accelerator Cable
Install the accelerator cable.
76G01A-148
Battery and Battery Carrier
1. Install the battery carrier.
Tightening torque:
9—13 N-m (90—130 cm-kg, 78—113 in-lb)
2. Install the fuse box.
Tightening torque:
8—11
N
m (80—110 cm-kg, 69—95 in-lb)
3. Install the battery tray and battery.
Tightening torque:
5_7
N m
(50—70 cm-kg, 43—61 in-lb)
1B—80