check oil MAZDA 626 1987 Repair Manual

INSPECTION AND REPAIR 1C
4. Check each connecting rod for bending or twist-
ing. Repair or replace if necessary.
Bend:
0.080 mm (0.0031 in) max.
/50 mm (1.969 in)
Twist:
0.080 mm (0.0031 in) max.
/50 mm (1.969 in)
76G01C-141
Crankshaft
1. Check the journals and pins for damage, scoring,
or oil hole clogging.
2. Set the crankshaft on V-blocks.
3. Check the crankshaft runout at the center journal.
Replace if necessary.
Runout: 0.05 mm (0.002 in) max.
76G01C-142
76G01C-143
Crankpin
Main journal
4. Measure each journal diameter in X and Y direc-
tions at two points.
Main journal
Diameter:
59.937—59.955 mm (2.3597—2.3604 in)
Minimum: 59.89 mm (2.358 in)
Out-of-round: 0.05 mm (0.002 in) max.
Crankpin journal
Diameter:
50.940—50.955 mm (2.0055—2.0061 in)
Minimum: 50.89 mm (2.004 in)
Out-of-round: 0.05 mm (0.002 in) max.
5. If the diameter is less than the minimum, grind the
journals to match undersize bearings.
Undersize bearing: 0.25 mm (0.010 in),
0.50 mm (0.020 in), 0.75 mm (0.030)
Main journal diameter undersize mm (in)
Bearing size Journal diameter
0.25 undersize 59.687-59.705 (2.3499—2.3506)
0.50 undersize 59.437-59.455 (2.3400-2.3407)
0.75 undersize 59.187-59.205 (2.3302-2.3309)
76G01C-144
1C-59

1C INSPECTION AND REPAIR
Rolled fillet
Crankpin journal diameter undersize mm (in)
Bearing size Journal diameter
0.25 undersize 50.690—50.705 (1.9957-1.9963)
0.50 undersize 50.440—50.455 (1.9858-1.9864)
0.75 undersize 50.190-50.205 (1.9760-1.9766)
Caution
Do not grind the rolled fillet area.
76G01C-145
Main Bearing and Connecting Rod Bearing
Check the main bearings and the connecting rod
bearings for peeling, scoring, or other damage.
79G01C-077
Timing Belt
1. Replace the timing belt if there is any oil or grease
on it.
2. Check the timing belt for damage, wear, peeling,
cracks, or hardening. Replace if necessary.
86U01X-113
Caution
a) Never forcefully twist, turn inside out, or
bend the timing belt.
b) Be careful not to allow oil or grease on the
belt.
86U01X-114
1C—60

ASSEMBLY (CYLINDER BLOCK) 1 C
Cylinder block side Crankshaft side
Lower side
4BG01B-159
2. Apply engine oil to the main bearings and main
journals.
3. Install the crankshaft and bearings.
4. Install the main bearing cap according to the cap
number and mark, and tighten it evenly in or-
der shown in the figure.
5. Check that the crankshaft turns easily.
76G01C-153
6. Inspect the crankshaft end play.
End play:
0.040—0.282 mm (0.0016—0.0111 in)
Maximum: 0.30 mm (0.012 in)
76G01C-154
76G01C-155
7. If the end play is not within the specification, ad-
just the end play with an oversize thrust bearing.
Standard width:
2.00—2.05 mm (0.0787—0.0807 in)
Oversize width:
2.175—2.225 mm (0.0856—0.0876 in)
Note
First replace the rear thrust bearings, if still
not within the specification, replace the front
thrust bearings also.
1C-65

1C ASSEMBLY (CYLINDER BLOCK)
Pilot Bearing
1. Apply engine oil to the outer circumference of the
bearing.
2. Set a piece of pipe (outer diameter 30—34 mm,
1.18—1.34 in) against the outer race of the bear-
ing, then tap it evenly into the crankshaft.
3. Lubricate the bearing with grease.
76G01C-156
Piston and Connecting Rod Assembly
1. Apply a liberal amount of clean engine oil to the
cylinder walls, piston, and rings.
2. Check the piston rings for the end gap alignment.
3. Insert each piston assembly into the cylinder block
with the "F" mark facing the front of the engine.
Use a piston installer tool (commercially available).
86U01X-128
Connecting Rod Cap
1. Check the connecting rod bearing clearances us-
ing the same procedure as used for the main bear-
ing oil clearance.
Connecting rod cap tightening torque:
65—69 N-m (6.6—7.0 m-kg, 48—51 ft-lb)
Oil clearance:
0.027—0.055 mm (0.0011—0.0022 in)
Maximum: 0.08 mm (0.0031 in)
76G01C-157
Caution
Align the alignment marks on the cap and on
the connecting rod when installing the con-
necting rod cap.
If the oil clearance exceeds the maximum, grind
the crankshaft and use undersize bearings. (Re-
fer to page 1C—60.)
76G01C-158
1C-66

ASSEMBLY (CYLINDER BLOCK) 1 C
3. Check the side clearance of each connecting rod
without the cap installed.
Side clearance:
0.11—0.262 mm (0.0043—0.0103 in)
Maximum: 0.30 mm (0.012 in)
If the clearance exceeds the maximum, replace the
connecting rod.
76G01C-159
4. Apply a liberal amount of engine oil to the crank-
pin journal and connecting rod bearing.
5. Install the connecting rod cap with the alignment
marks aligned.
Tightening torque:
65—69 Nm (6.6—7.0 m-kg, 48—51 ft-lb)
86U01X-130
Oil jet
Install the oil jet into the cylinder block.
Tightening torque: 12—18 N-m
(1.2—1.8 m-kg, 104—156 in-lb)
76G01C-160
1C-67

ASSEMBLY (TIMING BELT) 1 C
63G01D-431
76G01C-191
76G01C-192
Timing Belt Tensioner
1. Install the tensioner spring onto the tensioner.
2. Install the tensioner assembly.
3. Temporarily secure it so the tensioner is shifted
outward.
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 in the sequence shown in the
figure.
Caution
The timing belt must be reinstalled in the same
direction of rotation for continued durability.

76G01C-200

1C—83

INSTALLATION 1C
Accelerator Cable
Install the accelerator cable.
76G01C-235
76G01C-236
Engine Oil
Add the specified amount and type of engine oil. (Re-
fer to Section 2B)
Coolant
Close the drain plug, fill the radiator and reservoir tank
with the specified amount and type of coolant. (Re-
fer to Section 3B)
Check Engine Condition
1. Check for leaks.
2. Perform engine adjustments if necessary.
3. Perform a road test.
4. Recheck the oil and coolant levels.
1C—99

INSPECTION, ENGINE OIL 2A
86U02X-004
INSPECTION
ENGINE OIL
1. Be sure the vehicle is on level ground.
2. Warm up the engine to normal operating temper-
ature and stop it.
3. Wait for five minutes.
4. Remove the oil level gauge and check the oil lev-
el and condition.
5. Add or replace oil if necessary.
Note
The distance between the L and F marks on
the level gauge represents 1.0 liter (1.06 US
qt, 0.88 Imp qt).
OIL PRESSURE
1. Remove the oil pressure switch.
69G02A-006
76G02A-005
86U02X-006
2. Screw the SST into the pressure switch installa-
tion hole.
3. Warm up the engine to normal operating tem-
perature.
4. Run the engine at 3,000 rpm, and note the gauge
reading.
Oil pressure:
343—441 kPa
(3.5—4.5 kg/cm2, 50—64 psi)...DOHC 2g4 392 kPa
(3.0—4.0 kg/cm2, 43—57 psi)...SOHC
5. If the pressure is not as specified, check for the
cause, and repair if necessary.
(Refer to Troubleshooting Guide.)
ENGINE OIL
REPLACEMENT
1. Warm up the engine to the normal operating tem-
perature and stop it.
2. Remove the oil filler cap and the oil pan drain plug.
3. Drain the oil into a suitable container.
Warning
Be careful when draining, the oil is very hot.
2A-5

2A OIL FILTER, OIL COOLER
j
F

k
4

4. Install the drain plug and a new gasket.
5. Refill the engine with the specified type and amount
of oil.
6. Refit the oil filler cap.
Oil pan capacity:
3.6 liters (3.8 US qt, 3.2 Imp qt)
7. Recheck the oil level after the engine has been run.
76G02A-006
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86U02X-008
76G02A-007
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76G02A-008
OIL FILTER
REPLACEMENT
1. Remove the oil filter with a suitable wrench.
2. Use a clean rag to wipe off the mounting surface
on the engine.
3. Apply a small amount of engine oil to the rubber
seal of the new filter.
Warning
Be careful that the engine and filter are very
hot.
4. (DOHC)
Install the oil filter until the rubber seal contacts the
base and then tighten the filter
1
and
1
/6 turn with
a wrench.
(SOHC)
Install the oil filter and tighten it by hand only. Do
not use a wrench.
5. Start the engine and inspect around the filter seal
for leaks.
6. Check the oil level and add oil if necessary.
Oil filter capacity:
0.20 liters (0.21 US qt, 0.18 Imp qt)...DOHC
0.30 liters (0.32 US qt, 0.26 Imp qt)...SOHC

OIL
COOLER

(DOHC, 12-valve,
ECE
8-valve)

REMOVAL AND INSTALLATION
Remove in the sequence shown in the figure.
Install in the reverse order of removal.
1. Water hose
2. Oil filter
3. Nut
4. Oil cooler
Nut tightening torque:
29—39
N
m (3.0—4.0 m-kg, 22—29 ft-lb)
2A-6

2A OIL PAN
4BG02X-037
76G02A-013
76G02A-014
(SOHC)
1. Remove the oil pan mounting bolts.
2. Insert a scraper or a suitable tool between the oil
pan and the stiffener or the cylinder block to sep-
arate them.
3. Remove the oil pan.
Caution
Do not bend the oil pan when prying loose.
INSPECTION
Check the following points. Repair or replace if
necessary.
1. Cracks, deformation, damage
2. Damaged drain plug threads
INSTALLATION
Install in the reverse order of removal referring to the
installation note.
Installation Note
Stiffener (FE 8-valve...only ECE, 12-valve)
1. Remove any dirt or other material from the con-
tact surface.
2. Apply silicon sealant to the stiffener around inside
of the bolt holes and overlap the ends.
3. Install the stiffener.
Tightening torque:
7—12 Nm (70—120 cm-kg, 61—104 in-lb)
Oil pan
1. Apply silicon sealant to the oil pan around inside
of the bolt holes and overlap the ends.
2. Install the oil pan.
Tightening torque:
7—12 Nm (70—120 cm-kg, 61—104 in-lb)
Caution (DOHC)
Oil pan projection and recession from the end
of the cylinder block must not be more than
1.5 mm (0.06 in).
2A—8