1992 MAZDA PROTEGE ignition

82
ENGINE
m :
(DOHC)
INDEX .......................................... B2- 2
OUTLINE ...................................... B2- 3
SPECIFICATIONS ........................ B2- 3
TROUBLESHOOTING GUIDE .......... B2- 3
ENGINE TUNE-UP PROCEDURE ......
B2- 5
PREPARATION ............................
B2- 5
ENGINE OIL ............................... B2- 5
ENGINE COOLANT.. ....................
B2- 5
DRIVE BELT ............................... B2- 5
HLA .......................................... B2- 7
IGNITION TIMING, IDLE SPEED ..... B2- 8
COMPRESSION ............................. 82-l 0
INSPECTION ...............................
82-l 0
ON-VEHICLE MAINTENANCE.. ........ 82-l 1
PREPARATION ............................
B2-11
TIMING BELT .............................. 82-l 2
CYLINDER HEAD GASKET ...........
82-16
HLA .......................................... 82-22
FRONT OIL SEAL.. ......................
62-26
REAR OIL SEAL .......................... 82-28
REMOVAL ..................................... 82-31
PROCEDURE .............................. 82-31
ENGINE STAND MOUNTING.. .........
82-38
PREPARATION ............................ 82-38
PROCEDURE ..............................
82-39
DISASSEMBLY .............................. 82-41
PREPARATION ............................ B2-41
AUXILIARY PARTS.. ..................... 82-42
TIMING BELT ..............................
82-43
CYLINDER HEAD.. ...................... 82-45
CYLINDER BLOCK
(EXTERNAL PARTS) ...................
B2-48
CYLINDER BLOCK
(INTERNAL PARTS). ................... 82-51 INSPECTION / REPAIR.. ................. 82-54
PREPARATION ............................ 82-54
CYLINDER HEAD.. ...................... B2-54
VALVE MECHANISM.. .................. 82-55
CAMSHAFT ................................ B2-58
HLA .......................................... 82-80
CYLINDER BLOCK ...................... 82-60
OIL JET ..................................... B2-61
PISTON, PISTON RING, AND
PISTON PIN .............................. 82-62
CONNECTING ROD.. ...................
82-63
CRANKSHAFT ............................ B2-64
BEARING ................................... 82-64
TIMING BELT ..............................
82-65
TENSIONER, IDLER.. ................... 82-65
TENSIONER SPRING ................... 82-65
PULLEY ..................................... 82-65
ASSEMBLY ................................... B2-66
PREPARATION ............................ B2-66
CYLINDER BLOCK
(INTERNAL PARTS). ................... 82-68
CYLINDER BLOCK
(EXTERNAL PARTS) ................... 82-73
CYLINDER HEAD.. ...................... 82-79
TIMING BELT .............................. 82-84
AUXILIARY PARTS.. .....................
B2-87
ENGINE STAND DISMOUNTING ..a” . . 82-91
PROCEDURE ..............................
82-91
INSTALLATION ............................. 82-93
PROCEDURE .............................. 82-93
23UOB2-001

OUTLINE, TROUBLESHOOTING GUIDE
OUTLINE
SPECIFICATIONS
ItC- Engine
BP DOHC
Type Gasoline, 4-cycle
Cylinder arrangement and number In-line, 4 cylinders
Combustion chamber Pentroof
Valve svstem DOHC, belt-driven 16 valves
Displacement
Bore and stroke cc (cu in) 1,839 (112.2)
mm (in) I 83.0 x 85.0 (3.27 x 3.35)
Compression ratio
Compression pressure
IN
Valve timing
EX kPa (kg/cm*, psi)-rpm
BTDC Open
Close ABDC
Open BBDC
Close ATDC 9.0
1,256 (12.8, 182)300
!zJ”
48O
56O
140
Valve clearance IN 0: Maintenance-free
mm (in)
EX 0: Marntenance-free
Idle speed *’ *’ MTX
rpm
ATX
Ignition timing*2
Firing order
::...With parking brake applied. (Canada)
. ..TEN terminal of diagnosis connector grounded BTDC 700-800
700-800 (P range)
90-l 1 O
l-3-4-2
P3UOBZ003
TROUBLESHOOTING GUIDE
Problem
Difficult starting
Poor idling
Excessive oil
consumption Possible Cause
Malfunction of engine-related components
Burned valve
Worn piston, piston ring, or cylinder
Failed cylinder head gasket
Malfunction of fuel system
Malfunction of ignition system
Malfunction of engine-related components
Malfunction of HLA*
Poor valve-to-valve seat contact
Failed cylinder head gasket
Malfunction of fuel system
Malfunction of ignition system
Oil working up
Worn piston ring groove or sticking piston ring
Worn oiston or cvlinder
Oil working down
Worn valve seal
Worn valve stem or auide
Oil leakaae i
Replace 82-55
Replace or repair 92-60, 62
Reolace B2-16
Refer to Section F
I
Replace 82-47, 79
Replace 82-55
Refer to Section 0 I
82-3

B2 TROUBLESHOOTING GUIDE
Problem
Insufficient power
Abnormal
combustion
Engine noise -
I
I
f
,
I
I
,
I
I Possible Cause Action Page
Insufficient compression
Malfunction of HLA*
Compression leakage from valve seat
Seized valve stem
Ueak or broken valve spring
Failed cylinder head
gasket Cracked or distorted cylinder head
Sticking, damaged, or worn piston ring
Cracked or worn piston Replace
Repair
Replace
Replace
Replace
Replace
Replace
Replace
Refer to Section F 82-22
82-57
02-55
B2-58
82-16
82-54
82-62
82-62 Malfunction of fuel system
Malfunction of ianition svstem
Others
Slipping clutch
Dragging brakes
Wrong size tires Malfunction of engine-related components
Malfunction of HLA*
Sticking or burned valve
Weak or broken valve spring
Carbon accumulation in combustion chamber Malfunction of fuel system
Malfunction of ignition system
Crankshaft- or bearing-related parts
Excessive main bearing oil clearance
Main bearing seized or heat-damaged
Excessive crankshaft end play
Excessive connecting rod bearing oil clearance
Connecting rod bearing seized or heat-damaged Piston-related parts
Worn cylinder
Worn piston or piston pin
Seized piston
Damaged piston ring
Bent connecting rod Valves or timing-related parts
Malfunction of HLA*
Broken valve spring
Excessive valve guide clearance Malfunction of cooling system
Malfunction of fuel svstem
Others
Malfunction of water pump bearing Refer to Section E
Improper drive belt tension Adjust
Malfunction of alternator bearing Refer to Section G
Exhaust gas leakage Refer to Section F
Malfunction of timing belt tensioner Replace Refer to Section G
Refer to Section H
Refer to Section P
Refer to Section C!
Replace B2-22
Replace 82-55
Replace 82-58
Eliminate carbon -
Refer to Section F
Refer to Section G
Replace or repair B2-70
Replace 82-64
Replace or repair 82-7 1
Replace or repair B2-72
Replace B2-64
Replace or repair
82-60
Replace 82-63
Replace 82-62
Replace 82-62
Replace 82-63
Replace
Replace
Replace
Refer to Section E
Refer to Section F 82-22
82-58
82-55
B2- 6
82-12
23UOB2-00,
..J
.-,
l
Tappet noise may occur if the engine has set idle for an extended period. The noise should dissipate after the engine has reached
normal operating temperature. (HLA troubleshooting: Refer to page 82-7.)
82-4

82 ENGINE TUNE-UP PROCEDURE
03UOB2-013
IGNITION TIMING, IDLE SPEED
Preparation
1. Warm up the engine to normal operating temperature.
2. Turn all electric loads OFF.
3. Connect the
SST to the diagnosis connector.
4. Connect the timing light.
5. Connect a tachometer to the diagnosis connector
IO- ter-
minal as shown.
TEN
03UOB2-01
I
-&k BOLT
0311082-01’
82-8
6. Set switch @to position 1.
7. Set TEST SW to SELF-TEST.
Note
l If the SST is not used, jump across the TEN termi-
nal and the GND terminal of the diagnosis con-
nector.
Ignition Timing
Inspection / Adjustment
1. Perform “Preparation.” (Refer to above.)
2. Check if the timing mark (yellow) on the crankshaft pulley
and the mark on the timing belt cover are aligned.
Ignition timing: 10 * f lo BTDC (at Idle speed)
3. If the marks are not aligned, loosen the distributor lock bolts
and turn the distributor to make the adjustment.
4. Tighten the distributor lock bolts to the specified torque.
Tightening torque:
19-25 N*m (1 .Q-2.6 m-kg, 14-19 ft-lb)
5. Disconnect the SST.

B2 COMPRESSION
COMPRESSION
If the engine exhibits low power, poor fuel economy, or poor idle, check the following:
1, Ignition system (Refer to Section G.)
2. Compression
3. Fuel system (Refer to Section F.)
23UOB2-013
13UOl32.004
2311087-014
-_
B2-10
2311082-012
INSPECTION
1. Check that the battery is fully charged. Recharge it if neces-
sary. (Refer to Section G.)
2. Warm up the engine to normal operating temperature.
3. Turn the engine OFF.
4. Remove all spark plugs.
5, Disconnect the ignition coil connector.
6. Connect a compression gauge to the No.1 spark plug hole.
7. Fully depress the accelerator pedal and crank the engine.
8. Record the maximum gauge reading.
9. Check each cylinder.
Compression:
1,256 kPa (12.6 kg/cm’, 182 psi)-300 rpm
Minimum:
883 kPa (9.0 kg/cm2, 128 psi)-300 rpm
Max. difference between cylinders:
196 kPa (2.0 kg/cm2, 28 psi)
10. If the compression in one or more cylinders is low, pour a
small amount of engine oil into the cylinder and recheck
the compression.
(1) If the compression increases, the piston, piston rings,
or cylinder wall may be worn.
(2) If the compression stays low, the valve may be stuck
or seating improperly.
(3) If the compression in adjacent cylinders stays low, the
cylinder head gasket may be defective or the cylinder
head distorted.
Il. Connect the ignition coil connector.
12. Install the spark plugs.
05UOBX-020
Tightening torque:
15-23 N*m (1.5-2.3 m-kg, 11-17 ft-lb)

ON-VEHICLE MAINTENANCE
13EOB2-015
DEFLECTION CHECKING POINT
13EOE2-011
23UOB2-017
23UOB2-018
Steps After Installation
1. Connect the negative battery cable.
2. Start the engine and check as follows:
l Ignition timing. (Refer to page B2-8.) 10. Loosen the tensioner lock bolt to apply spring tension to
the timing belt.
11. Tighten the tensioner lock bolt.
Tightening torque:
37-52 Narn (3.8-5.3 m-kg, 27-38 ft-lb)
12. Install the pulley boss and pulley lock bolt.
13. Turn the crankshaft 2 and 116 turns clockwise and verify
that the timing marks are correctly aligned.
14. Measure the timing belt deflection by applying moderate
pressure (98 N,
10 kg, 22 lb) midway between the cam-
shaft pulleys.
If the deflection is not correct, repeat from Step 10 above.
Deflection:
9.0-11.5mm (0.35-0.45 In) at 98 N (10 kg, 22 lb)
Spark plug
1. Install the spark plugs.
Tightening torque:
15-23 Nern (1.5-2.3 m-kg, 11-17 ft-lb)
Pulley lock bolt
1, Hold the crankshaft with the SST and tighten the pulley lock
bolt.
Tightening torque:
157-187 N*rn (18-17 m-kg, 118-123 ft-lb)
23UOB2-019
82-l 5

B2 ON-VEHICLE MAINTENANCE
03UOB2-033
FOUR TEETH
13UOB2-015
05UOBX-032
B2-20
Timing belt
1. Check that the ignition timing mark (yellow) on the crank-
shaft pulley and the timing mark on the timing belt cover
are aligned.
2. Verify that the camshaft pulley marks are aligned with the
seal plate marks.
Caution
l For intake side, align the I mark.
l For exhaust side, align the E mark.
3. Install the timing belt so that there is no looseness at the
idler side or between the two camshaft pulleys.
Caution
l Do not turn the crankshaft counterclockwise.
4. Turn the crankshaft two turns clockwise, and align the tim-
ing belt pulley mark with the timing mark.
5. Verify that the camshaft pulley marks are aligned with the
seal plate marks.
If not aligned, remove the timing belt and repeat from ten-
sioner installation.
6. Turn the crankshaft 1 and 5/6 turns clockwise, and align
the fourth tooth from the
I mark with the seal plate mark.
7. Loosen the tensioner lock bolt to apply tension to the tim-
ing belt.
8. Tighten the tensioner lock bolt.
Tightening torque:
37-52 N#rn (3.8-5.3 m-kg, 27-38 ft-lb)
9. Turn the crankshaft 2 and l/6 turns clockwise and verify
that the timing marks are correctly aligned.

ON-VEHICLE MAINTENANCE
DEFLECTION CHECKING POINT
05UOBX-03 3 10. Measure the timing belt deflection by applying moderate
pressure (98 N, 10 kg, 22 lb) midway between the two cam-
shaft pulleys.
If the deflection is not correct, repeat from Step 7 above.
Deflection:
9.0-11.5mm (0.35-0.45 in) at 98 N (10 kg, 22 lb)
Harness
1. Connect the harness connectors. (Refer to page 82-l 8.)
Hose
1. Connect the hoses. (Refer to page 82-17.)
03UOB2-035
Accelerator cable
1. Install the accelerator cable.
2. Check the accelerator cable deflection.
If the deflection is not correct, adjust by turning nut A.
Deflection: l-3mm (0.04-0.12 In)
Steps After Installation
1. Fill the radiator with the specified amount and type of engine coolant. (Refer to Section E.)
2. Connect the negative battery cable.
3. Start the engine and check as follows:
(1) Engine oil and engine coolant leakage.
(2) Ignition timing, idle speed. (Refer to page B2-8.)
(3) Operation of emission control system.
4. Recheck the engine coolant levels.
2311082-022
B2-21