1987 MAZDA 626 Workshop Manual

2A OUTLINE
OUTLINE
LUBRICATION CIRCUIT (DOHC)
76G02A-002
1. Oil pump 5. Oil cooler
2. Pressure regulator valve 6. Oil filter
3. Main gallery 7. Oil control plug
4. Oil pressure switch 8. Oil jet
2A—2

OUTLINE 2A
LUBRICATION CIRCUIT (SOHC)
76G02A-025
1. Oil pump
2. Pressure regulator valve
3. Main gallery
4. Oil pressure switch
5. Oil cooler (8-valve...only ECE, 12-valve)
6. Oil filter
7. Oil control plug
2A-3

2 A TROUBLESHOOTING GUIDE
SPECIFICATIONS
Engine model Item . FEDOHC F6, F8, FE SOHC
Lubrication system Force-fed
Oil pump
Type Trochoid gear Crescent gear
Oil pump Regulated pressure kPa (kg/cm2, psi) 490 (5.0, 71) 392 (4.0, 57) Oil pump
Oil pressure kPa (kg/cm2, psi)
1,000 rpm 147-245 (1.5-2.5, 21-36) Oil pump
Oil pressure kPa (kg/cm2, psi) 3,000 rpm 343—441 (3.5-4.5, 50-64) 294-392 (3.0-4.0, 43—57)
Oil filter Type Full-flow, paper element Oil filter Relief pressure differential kPa (kg/cm2, psi) 98 (1.0, 14)
Oil cooler Type Water cooled, 6-layer Water cooled, 4-layer
Oil warning pressure kPa (kg/cm2, psi) 29 (0.3, 4.3)
Oil capacity
Total (dry engine) liters (US qt, Imp qt) 4.3 (4.5, 3.8)
Oil capacity Oil pan liters (US qt, Imp qt) 3.6 (3.8, 3.2) Oil capacity
Oil filter liters (US qt, Imp qt) 0.2 (0.21, 0.18) 0.3 (0.32, 0.26)
Engine oil (API service) SD, SE, or SF
76G02A-003
Recommended SAE Viscosity
Temperature j0pj
-30 -20 -10 0 10 20 30 40 50 I l I I 1 < ! I I Temperature j0pj i i i i I i 1 1
-20 0 20 40 60 80 100 120
Engine oil Engine oil
5W-30 X 30 >
Engine oil Engine oil
5W-20 > < 20W-20 > < 40
Engine oil < 10W-30 > Engine oil
< 10W-40 10W-50
Engine oil Engine oil
< 20W-40 20W-50
Engine oil
Temperature range anticipated before next oil change, °C(°F)
TROUBLESHOOTING GUIDE
Problem Possible Cause Remedy Page
Engine hard
starting
Improper engine oil
Insufficient engine oil
Replace
Add oil
2A— 5
2A— 5
Excessive oil con-
sumption
Oil working up or working down
Oil leakage
Refer to Section 1
Repair
Oil pressure drop Insufficient oil
Oil leakage
Worn or damaged oil pump gear
Worn plunger (inside oil pump) or weak spring
Clogged oil strainer
Excessive main bearing or connecting rod bearing
clearance
Add oil
Repair
Replace
Replace
Clean
Refer to Section 1
2A- 5
2A-11
2A-11
Warning lamp illu-
minated while en-
gine running
Oil pressure drop
Malfunction of oil pressure switch
Malfunction of electrical system
As described above
Refer to Section 15
Refer to Section 15
76G02A-004
2A—4

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
TbJ
r
86U02X-008
76G02A-007
0
A
if \ lO
/O
f \ 11 • V jJ
VJ f .fa,-
n D
©
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

OIL PAN 2A
OIL PAN
REMOVAL
1. Disconnect the negative battery cable.
2. Drain the engine oil.
3. Remove in the sequence shown in the figure referring to the removal note for specially marked parts.
76G02A-009
5. Sub frame (RH)
6. Oil pan
7. Oil strainer
8. Stiffener (FE 8-valve...only ECE, 12-valve)
Removal Note
Oil pan
(DOHC)
1. Remove the oil pan mounting bolts.
2. Install the bolt ©from the mounting bolt or 10 mm
(0.39 in) bolts in the specified bolt holes ©(both
sides).
3. Screw in the bolts gradually and alternately to re-
move the oil pan.
Caution
Do not pry the oil pan to prevent damaging the
contact surface.
1. Exhaust pipe
2. Gusset plate (SOHC)
3. Clutch housing under cover (SOHC)
4. Performance plate (4WS)
2A-7

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

OIL PUMP 2A
OIL PUMP
REMOVAL
1. Disconnect the negative battery cable.
2. Drain the engine oil.
3. Remove in the sequence shown in the figure referring to the removal note for specially marked parts. 76G02A-015
DOHC
76G02A-016
1. Timing belt (Refer to Section 1B) 4. Timing belt pulley
2. Oil pan (Refer to page 2A—7.) 5. Oil pump
3. Timing belt pulley lock bolt
2A-9