1987 MAZDA 626 lock

1C TUNE-UP PROCEDURE
Comprex supercharger
Deflection mm (in)
New 4 0-6.0 (0.16—0.23)
Used 8.0-10 0 (0 31-0.39)
If necessary, loosen the idler lock nut and adjust
the belt deflection by turning the adjust bolt.
Tightening torque:
16—23 Nm (1.6—2.3 m-kg, 12—17 ft-lb)
76G01C-011
o
INJECTION TIMING
1. Disconnect the negative battery cable.
2. Release the CSD using the screw driver.
3. Remove the cover on the clutch housing.
4. Turn the flywheel and set the indicator at ATDC.
5. Disconnect the injection pipes from the injection
pump.
76G04D-008
6. Remove the hydraulic head plug from the injec-
tion pump.
7. Mount the SST into the plug hole on the hydraulic
head so the tip of the dial gauge pointer touches
the plunger end of the pump and the dial gauge
indicates approx. 2.0 mm (0.08 in).
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8. Turn the crankshaft slowly counterclockwise to
30-50° BTDC.
9. Make sure the dial indicator pointer no longer
moves by slightly turning the crankshaft.
10. Set the dial gauge scale to Zero at the pointer.
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1C-8

TUNE-UP PROCEDURE 1C
11. Turn the crankshaft clockwise to align the indica-
tor pin at ATDC 1° (RF-CX), ATDC 2° (RF-N)
12. Read the dial gauge.
Cam lift: 0.98—1.02 mm (0.038—0.040 in)
13. If not within the specification, adjust the injection
timing. (Refer to page 4D—24.)
76G04D-011
Idle Speed
1. Warm up the engine to normal operating tem-
perature.
2. Be sure the A/C switch is OFF.
3. Connect a tachometer and check the engine
speed.
Idle speed: 720 ±20 rpm
If the idle speed is not within the specification, adjust
the idle speed referring to Section 4D.
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Exhaust Smoke
Increase and decrease the engine speed several
times and check that black smoke is not emitted.
If there is, refer to Section 4D for the appropriate
procedure.
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1C—9

1 C ON-VEHICLE MAINTENANCE (TIMING BELT)
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Kww
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Removal note
Timing belt
1. Aligh the timing marks of each pulleys.
2. Affix the injection pump pulley to the bracket us-
ing two bolts (35—40 mm, 1.4—1.6 in).
Caution
a) Do not turn in the reverse direction of en-
gine revolution.
b) After removing the timing belt, do not ro-
tate the crankshaft pulley or camshaft
pulley.
3. Make the forward direction arrow on the timing belt.
Note
Direction arrow is to reassemble the timing
belt in the same direction.
4. Loosen the timing belt tensioner bolt.
5. Shift the tensioner outwards as far as possible, and
temporarily tighten it.
6. Suspend the engine with chain block on the front
engine hanger.
7. Remove the No.3 engine mount.
8. Remove the timing belt.
Caution
Do not allow any oil or grease on the timing
belt.
Inspection and Repair
Inspect the following parts. (Refer to page 1C—60,
61).
1. Timing belt
2. Timing belt tensioner and spring
3. Timing belt idler pulley
4. Timing belt pulley
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1C—12

ON-VEHICLE MAINTENANCE (TIMING BELT) 1 C
2. Install the timing belt tensioner and spring.
3. Temporarily secure the tensioner with it shifted
outwards.
63G01D-330
4. Install the timing belt.
Caution
a) The timing belt must be reinstalled in the
same direction of previous rotation, if it is
to be reused.
b) Be sure that there is no oil, grease, or dirt
on the timing belt.
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Install the idler pulley.
Tightening torque:
37—52
N
m (3.8—5.3 m-kg, 27-38 ft-lb)
Remove the affixing bolts from the injection pulley.
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7. Loosen the tensioner lock bolt.
8. Turn the crankshaft twice in the direction of rota-
tion (clockwise).
Caution
Do not rotate reverse direction.
9. Check that each timing mark is correcty aligned.
If not aligned, remove the timing belt. Repeat step
1-8.

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1C-14

ON-VEHICLE MAINTENANCE (TIMING BELT) 1 C
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76G01C-028
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Checking
point
Idler pulley
Crankshaft pulley zQi A/C
Checking point compressor
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10. Tighten the timing belt tensioner lock bolt.
Tightening torque:
37—52
N
m (3.8—5.3 m-kg, 27—38 ft-lb)
11. Check the timing belt tension.
If the tension is not correct, loosen the tensioner
lock bolt and repeat step 7—10, or replace the ten-
sioner spring.
Deflection: 9.0—11.5 mm
(0.35—0.45 in) /98 N (10 kg, 22 lb)
Caution
Be sure not to apply tension other than that
of the tensioner spring.
No.3 engine mount
Install the No.3 engine mount.
Tightening torque:
Nut A: 85—117 N-m
(8.7—11.9 m-kg, 63—86 ft-lb)
Nut B: 67—93 N-m
(6.8—9.5 m-kg, 49—69 ft-lb)
Drive belt
Install each drive belt, and check the belt deflection.
(Refer to page 1C—7.)
Steps after installation
Perform the necessary engine adjustment. (Refer to
TUNE-UP PROCEDURE,)
1C-15

ON-VEHICLE MAINTENANCE (CYLINDER HEAD) 1 C
Removal note
Fuel hose
Warning
a) Cover the hose with a rag because fuel will
spray out when disconnecting.
b) Keep fire and open flame away from the fuel
area.
Plug the disconnected hoses to avoid fuel leakage.
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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.
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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.

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1C—17

1 C ON-VEHICLE MAINTENANCE (CYLINDER HEAD)
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76G01C-035
69G01A-031
Injection pump pulley
1. Put two bolts of 35—40 mm (1.4—1.6 in) length
into the arms of the injection pump pulley and af-
fix them in the threaded hole of the injection pump
bracket.
2. Loosen the injection pump pulley lock bolt.
3. Separate the injection pump pulley from the injec-
tion pump shaft with the SST.
Cylinder head bolt
Loosen the cylinder head bolts in two or three steps,
and in the order shown in the figure.
Disassembly of Cylinder Head
Refer to page 1C—40.
Inspection of Cylinder Head
Refer to page 1C—47.
Assembly of Cylinder Head
Refer to page 1C—73.

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1C-18

ON-VEHICLE MAINTENANCE (CYLINDER HEAD) 1 C
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Apply engine oil
/
Cylinder head bolt
below head length
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(8) (4; D (5)
® ®
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3m-kg
(21.7ft-lb
Installation
Cylinder head
1. Throughly remove all dirt and grease from the top
of the cylinder block with a rag.
2. Place the new cylinder head gasket in position.
3. Remove any dirt and grease from the bottom sur-
face of the cylinder head.
4. Place the cylinder head in position.
5. Measure the length of the cylinder head bolt be-
low the head. If the length exceeds the maximum,
replace the bolt.
Length: 113.2—113.8 mm (4.457—4.480 in)
Maximum: 114.5 mm (4.508 in)
6. Apply engine oil to the threads and the seat face
of the cylinder head bolts.
7. Tighten the cylinder head bolts.
(1) Tighten the bolts to the specified torque, in the
order shown in the figure.
Tightening torque:
29 N-m (3.0 m-kg, 22 ft-lb)
(2) Make paint marks on the bolt heads, as shown
in the figure.
(3) With the paint marks as a reference point, turn
the cylinder head bolts another 90°
(90°—105°) in the tightening direction. Tight-
en them in the order.
(4) Then tighten them once again 90°
(90°—105°) in the tightening order.
Caution
Be absolutely sure that the bolts are tightened
in the proper order.

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1C—20