1987 MAZDA 626 Workshop Manual

ON-VEHICLE MAINTENANCE (CYLINDER HEAD) 1 C
76G01C-041
76G01C-042
76G01C-043
Seal plate
1. Install the seal plate.
Tightening torque:
8—12
N
m (80—120 cm-kg, 69—104 in-lb)
2. Check that the seal plate sealing rubbers are in-
stalled in position.
Rear camshaft pulley
1. Install the rear camshaft pulley.
2. Hold the camshaft with a wrench (29 mm, 1.14 in),
and tighten to the specification.
Tightening torque:
55—65
N
m (5.6—6.6 m-kg, 41—48 ft-lb)
Camshaft pulley
1. Connect the camshaft pulley onto the camshaft with
the semicircular (woodruff) key.
2. Hold the camshaft with a wrench (29 mm, 1.14 in),
tighten the camshaft pulley lock bolt.
Tightening torque:
55—65 Nm (5.6—6.6 m-kg, 41—48 ft-lb)
3. Align the mark on the camshaft pulley with the mark
on the seal plate.
76G01C-044
1C—21

1 C ON-VEHICLE MAINTENANCE (CYLINDER HEAD)
76G01C-045
Gasket
Head cover Apply sealant
J
76G01C-046
76G01C-047
Timing marks
Timing marks
Timing
marks-
Injection pump pulley
1. Install the injection pump pulley with the semicir-
cular (woodruff) key to the injection pump shaft.
2. Rotate the injection pump pulley until the timing
marks are aligned.
3. Affix the injection pump pulley to the bracket us-
ing two bolts (35—40 mm, 1.4—1.6 in).
4. Tighten the lock nut.
Tightening torque:
59—69 Nm (6.0—7.0 m-kg, 43—51 ft-lb)
Cylinder head cover
1. Apply sealant to the shaded areas.
2. Install the cylinder head cover.
Tightening torque:
7—10
N
m (70—100 cm-kg, 61—87 in-lb)
3. Install the PCV hose.
Timing belt
1. Return the crankshaft about 45° to the timing mark
on the oil pump housing.
2. Check that the timing marks of the camshaft pul-
ley and the injection pump pulley align with the tim-
ing marks on the seal plate.
3. Install the timing belt. (Refer to TIMING BELT of
ON-VEHICLE MAINTENANCE)
76G01C-048
1C-22

ON-VEHICLE MAINTENANCE (CYLINDER HEAD) 1 C
76G01C-049
Injection pipe
1. Check that no dirt or other foreign material is on
the pipe coupling.
2. Install the injection pipes.
Tightening torque:
25—29 Nm (2.5—3.0 m-kg, 18—22 ft-lb)
3. Install the pipe clip.
Tightening torque:
4—6 N-m (40—60 cm-kg, 35—52 in-lb)
Vacuum pump drive belt
1. Install the vacuum pump drive belt, and adjust the
belt deflection. (Refer to 1C—7)
2. Install the drive belt cover.
Tightening torque:
8—11 Nm (80—110 cm-kg, 69—95 in-lb)
3. Connect the vacuum hose securely and squeeze
the clamp lightly with pliers to ensure a good fit.
76G01C-050
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.)
76G01C-051
1C—23

1 C ON-VEHICLE MAINTENANCE (VALVE SEAL)
VALVE SEAL
Removal
1. Disconnect the negative battery cable.
2. Remove in the sequence shown in the figure referring to the removal note for specially marked parts.
76G01C-052
76G01C-053
1. Cylinder head cover 7. Tappet and adjusting disc
2. Timing belt (Refer to page 1C—11) 8. Valve keeper
3. Camshaft pulley 9. Upper valve spring seat
4. Rear camshaft pulley 10. Valve spring
5. Camshaft cap 11. Lower valve spring seat
6. Camshaft and oil seal 12. Valve seal
1C—24

ON-VEHICLE MAINTENANCE (VALVE SEAL) 1 C
Removal note
Camshaft pulley
1. After removing the timing belt, turn the crankshaft
45° clockwise.
76G01C-054
2. Hold the camshaft with a wrench (29 mm, 1.14 in)
and loosen the camshaft pulley lock bolt.
Caution
Do not damage the cylinder head edge with
the wrench.
4BG01B-044
3. Separate the camshaft pulley from the camshaft
with the SST.
Caution
Do not hit the camshaft pulley with a hammer.
Rear camshaft pulley
Remove the rear camshaft pulley in the same man-
ner used for camshaft pulley.
76G01C-055
Camshaft cap
Loosen the camshaft nuts in two or three steps in the
order shown in the figure.

76G01C-066

1C—25

1 C ON-VEHICLE MAINTENANCE (VALVE SEAL)
Valve seal
1. Plug the oil drain hole with a rag to prevent the posi-
bility of the valve keepers from falling into the oil
pan.
2. Turn the crankshaft to position the piston of the
valve seal to be replaced at top dead center.
3. Remove the valve keepers with the SST.
76G01C-057
4. Remove the valve spring and spring seats.
5. Remove the valve seal with the SST.
Caution
Do not turn the crankshaft while the valve
spring is removed. Replace the valve seals at
every cylinders.
76G01C-058
1C—26

ON-VEHICLE MAINTENANCE (VALVE SEAL) 1 C
Installation
Install in the reverse order of removal referring to the installation note.
Torque Specifications
20—26 N-m (2.0—2.7 m-kg, 14—20 ft-lb)
N-m (5.6—6.6 m-kg, ft-lb)
55—65 N m (5.6—6.6 m-kg, 41—48 ft-lb)
76G01C-243
Installation note
Valve seal
1. Apply engine oil to the inside of the new valve seal.
2. Push it on gently with the SST.
86U01X-049
1C—27

1 C ON-VEHICLE MEINTENANCE (VALVE SEAL)
3. Install the spring seat, valve springs and valve
keepers with the SST.
76G01C-059
Tappet and adjusting disc
1. Apply engine oil to the tappets.
2. Install the tappets in the hole.
3. Install the adjusting discs.
76G01C-060
Camshaft and camshaft cap
1. Move the No.1 piston to TDC, and then rotate
the crankshaft approximately 45°
76G01C-061
' Apply sealant
2. Apply engine oil to the camshaft and the journals.
3. Apply a coat of sealant to the shaded areas as
shown in the figure.
76G01C-062
1C-28