MAZDA 626 1987 Workshop Manual

1 B 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
® © © (D ® 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 as shown
in the figure.
2. Install the cylinder head cover and gasket.
Tightening torque:
4—6 N-m (40—60 cm-kg, 35—52 in-lb)
76G01B-033
Timing belt
1. Align the mating marks of the camshaft pulleys with
the seal plate timing mark.
Note
For intake side camshaft pulley, align "I"
mark.
For exhaust side camshaft pulley, align "E"
mark.
2. Install the timing belt. (Refer to TIMING BELT of
ON-VEHICLE MAINTENANCE.)
76G01B-034
1B—20

ON-VEHICLE MAINTENANCE (CYLINDER HEAD) 1 B
Distributor
1. Apply engine oil to the O-ring, and position it on
the distributor.
2. Apply engine oil to the blade.
3. Install the distributor.
4. Loosely tighten the distributor mounting bolt.
76G01A-035
Engine harness connector
Install the engine harness connectors.
1. IG coil
2. Heat gauge unit
3. Speed sensor
4. P/S switch
5. Engine ground
6. Water tempera-
ture sensor
7. Water thermo
switch
8. Crank angle
sensor
9. Oxygen sensor
10. Linear solenoid
11. Solenoid valve
(idle speed
control)
12. Throttle position
sensor
13. Injection harness
76G01B-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-041
1B-21

1B REMOVAL
REMOVAL
Warning: Release the fuel pressure. (Refer to Section 4C.)
1. Disconnect the negative battery cable.
2. Drain the engine oil and coolant.
3. Remove in the sequence shown in the figure referring to the removal note for specially marked parts.
76G01B-036
1B—22

REMOVAL 1B
1. Battery and battery carrier
2. Air cleaner assembly
3. High-tension lead
4. Accelerator cable
5. Fuel hose
6. Radiator hose
7. Radiator harness
8. Radiator and electric fan
9. EGI harness
10. Engine harness
11. Brake vacuum hose
12. Canister hose (Unleaded
fuel)
13. Heater hose
14. Transaxle harness
15. Speedometer cable
16. Clutch release cylinder
17. Drive belt
18. A/C compressor and
bracket
19. P/S oil pump
20. Engine side cover
21. Front wheel
22. Tie-rod end
23. Stabilizer control rod
24. Lower arm bushing
25. Driveshaft
26. Change rod
27. Extension bar
28. Exhaust pipe
29. Engine mount
30. Engine and transaxle
31. Transaxle
76G01B-037
Removal Note
Fuel hose
Warning
a) Cover the hose with a rag because fuel will
spray out when disconnecting.
b) Keep sparks and open flame away from the
fuel area.
Plug the disconnected hoses to avoid fuel leakage.
76G01A-11£
P/S pump, A/C compressor
Remove the P/S pump and A/C compressor with the
hoses still connected to them, secure the pump and
compressor as shown in the figure.
67U01X-029
Driveshaft
Remove the driveshafts. (Refer to Section 9.) Slide
the SST into the transaxle.
86U01X-060
1B—23

1 B DISASSEMBLY (AUXILIARY PARTS)
DISASSEMBLY
1. Remove in the sequence shown in the figure referring to the disassembly note for specially marked
parts.
2. Code all identical parts (such as pistons, piston rings, connecting rods, and valve springs) so that
they can be reinstalled in the cylinder from which they were removed.
3. Clean the parts with steam, blow off any remaining water with compressed air.
Note
Care should be taken during the disassembly of any part or system to study its order of
assembly. Any deformation, wear, or damage should also be noted.
AUXILIARY PARTS
76G01A-119
1B—24

DISASSEMBLY (AUXILIARY PARTS) 1 B
1. Oil level gauge
2. P/S oil pump bracket
3. EGR pipe(Unleaded fuel)
4. Exhaust manifold insulator
5. Exhaust manifold assembly
6. Coolant inlet pipe and bypass pipe
7. Engine hanger
8. Alternator
9. Alternator strap and bracket
10. Engine mount bracket
11. Center cover
12. Distributor and high-tension lead
13. Spark plug
14. Thermostat and thermostat cover
15. Intake manifold bracket
16. Intake manifold assembly
17. Oil filter
18. Oil cooler
19. Oil pressure switch
76G01B-039
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49 G030 D05A
76G01A-120
Disassembly Note
Engine hanger
Remove the exhaust manifold; then connect the SST
to the engine.
69G01X-000
1B—25

1 B DISASSEMBLY (TIMING BELT)
TIMING BELT
69G01B-072
1. Crankshaft pulley 6. Timing belt idler pulley
2. Upper timing belt cover 7. Timing belt
3. Lower timing belt cover 8. Camshaft pulley
4. Baffle plate 9. Timing belt pulley
5. Timing belt tensioner and spring
1B—26

DISASSEMBLY (TIMING BELT) 1 B
Mark the
direction of
rotation
76G01A-121
76G01B-119
Disassembly Note
Crankshaft pulley
1. Set the SST against the flywheel.
2. Remove the crankshaft pulley.
Timing belt
1. Loosen the tensioner lock bolt, and remove the ten-
sioner spring.
2. Mark the timing belt rotation for proper reinstalla-
tion if it is reused.
3. Remove the timing belt.
Caution
Be careful not to allow oil or grease on the
belt.
Camshaft pulley
Remove the pulley lock bolt using a screw driver to
prevent the camshaft from turning.
76G01A-123
1B—27

1 B DISASSEMBLY (CYLINDER HEAD)
CYLINDER HEAD
1. Cylinder head cover
2. Seal plate
3. Camshaft cap
4. Camshaft
5. Hydraulic lash adjuster
6. Cylinder head bolt
7. Cylinder head
8. Cylinder head gasket
9. Valve keeper
10. Upper spring seat
11. Outer valve spring
12. Inner valve spring
13. Lower spring seat
14. Valve
15. Valve seal
76G01B-040
1B—28

DISASSEMBLY (CYLINDER HEAD) 1 B
76G01B-041
76G01B-042
Disassembly Note
Camshaft
Before removing the camshaft, clean the bearings
and journals, and measure the following points.
1. Camshaft end play. (Refer to page 1B—41.)
2. Camshaft journal oil clearance. (Refer to page
1B—40.)
Hydraulic lash adjuster (HLA)
Remove the HLA from the cylinder head.
Note
Mark each HLA so that they can be reinstalled
in the position from which they were removed.
Cylinder head bolt
Loosen the cylinder head bolts in two or three steps
in the order shown in the figure.
86U01X-068
Valve
Remove the valves from the cylinder head with the
SST.
86U01X-069
1B—29