Page 11 of 392
4Table 3
CO HC Problems Causes
1. Fa ult
. Inc orre c t ignition timing
. Fouled, shorted or imprope rly cle aranc e of spa rk plug
2. Incorrect valve clearance
3. Le a ky inta ke & e xha ust valve s
4. Leaky cylinders
1. Air leaks
. PCV hoses, intake manifold
. Throttle body
. Brake booster circuit
2. Le a n mixture ga s c a using misfire
1. Clogged air filter
2. Clogge d P CV valve
. Faulty ECU
. Fa ulty fue l pre ssure regula tor
. Faulty water temperature sensor
. Faulty air compressor
. Faulty injectors
. Faulty throttle position sensor Normal
Low High
High HighRough idle
(Black smoke
from exhaust
pipe ) Rough idle Rough idle High
Page 17 of 392
10Chapter 2 Engine Components Replacement
(MR479Q, MR479QA, MR481QA)Section 1 Engine ComponentsComponent 1Air Filter Assembly W/ Hose
Accelerator Control
Cable Assembly
Heater Inlet Hose
Heater Outlet Hose
Fuel Sub-Assembly
Efi Fuel Pipe Clamp
MT:
Transmission
Control Cable
Assembly
AT :
Transmission Control Cable Assembly MT:
Clutch Release
Cylinder Assembly
Radiator Outlet Pipe Radiator Inlet Pipe
Starter AssemblyAT: Oil Cooler Outlet Pipe
AT: Oil Cooler Inlet Pipe
Radiator Assembly
BatteryFront Exhaust
Pipe Assy.3-way catalytic
converterMufflerTail PipeFigure 20
Page 20 of 392

13Section 2 Engine Components Replacement1. Avoid gasoline ejection when work.
2. Drain the coolant to empty.
3. Remove air filter assembly with hose. See (Figure 23)
4. Remove battery
5. Remove fuel delivery pipe sub-assembly
6. Disconnect water hoses, disconnect heater outlet hose
from A/C hose.
7. Loose nut, remove accelerator control cable
8. Remove throttle body assembly
9. Remove power steering pump reservoir assembly
10. Remove front exhaust pipe assembly
11. Remove steering gear boot
12. Seperate steering column assembly. See (Figure 24)
13. Remove front wheel hub nut
14. Disconnect front wheel vehicle speed sensor (with ABS)
15. Detach steering tie rod ball stud pin assembly
16. Detach front lower swing arm sub-assembly
17. Detach front propeller assembly. See (Figure 25)
Detach front propeller from the shaft hub with plastic hammer.
18. Disconnect transmission shift cable or gear shift level assembly
19. Disconnect clutch cylinder assembly or disconnect clutch cable
20. Detach engine assembly and transaxle
(a) Hoisting engine ;
(b) Remove 3 bolts. Detach the right engine mounting bracket. See (Figure 26) ;
(c) Remove 1 bolt. Detach the left engine mounting bracket;
(d) Remove 1 bolt. Detach the rear engine mounting bracket;
(e) Remove engine and transaxle and put them on the pallet;
(f) Jack up the boday.Figure 23
Figure 24
Figure 25 Figure 26
Page 23 of 392

16(c) Install and uniformly tighten connecting bolt in the sequence shown inthe figure.
Torque: 64N. m
62. Install manual transaxle assembly
63. Install starter assembly
64. Install power steering pump bracket
65. Install power steering pump adjusting bracket with 2 bolts.
66. Connect power steering pump assembly
67. Install engine assembly and transaxle
68. Connect left, right, front and rear lower suspension arm sub-assembly
69. Connect left and right tie rod ball stud pin assembly
70. Connect left, right and front vehicle speed sensor (with ABS)
71. Install left & right nuts on the front shaft hub
72. Install front exhaust pipe assembly
73. Connect steering shaft assembly and steering column hole cover. See (Figure 36)
74. Connect wire harness
75. Install belt adjusting bracket of A/C compressor
76. Connect A/C compressor
77. Install generator assembly
78. Install A/C compressor to crankshaft pulleyV-belt
79. Install generator belt
80. Install engine assembly with transaxle
81. Install radiator assembly
82. Install throttle body assembly
83. Install fuel delivery pipe sub-assembly
84. Install battery
85. Install air filter assembly with hose
86. Install front wheel
87. Fill engine oil
88. Fill coolant
89. Check engine oil for leakage
90. Check engine coolant for leakage
91. Check fuel for leakage
92. Check idle and ignition timing
93. Check CO/HC
94. Check and adjust front wheel alignment
95. Check ABS vehicle speed sensor signalFigure 35
Figure 36
Page 24 of 392
17Section 3 Timing Belt ReplacementFigure 37Air Filter Assembly W/ HoseHigh Pressure CableVentilation PipeSeal
Cylinder Head
Right Engine Mounting
Fan & Generator V-Belt
V-Belt No.1Cylinder Head GasketGasket
Timing Chain Or Timing Belt Cover Assembly No. 2
Crankshaft Or Pulley
Cover Sub-Assembly
Crankshaft PulleyTiming Belt Guide
Timing Chain Timing Belt
Cover Sub-Assembly
Generator Assembly Timing Belt
Fan Pulley Vane-Type Pump V-Belt V/ Power Steering
Page 25 of 392

181. Disconnect engine from all the wire harnesses and cables connected to body.
2. Remove air filter assembly with hose. See (Figure 38)
3. Disconnect oil pipe and water hoses
4. Loose positive and negative cables on battery
5. Detach propeller shaft
6. Loose engine left & right rear brackets after hoisting engine
7. Disconnect all the connectors of engine and the body
8. Remove engine per "Provision 20, Section 2, Chapter 2"
9. Remove A/C compressor to crankshaft pulley V-belt
10. Remove power steering pump V-belt
11. Remove water pump fan pulley
12. Remove high pressure cable.
13. Remove cylinder head cover sub-assembly
14. Remove generator assembly. See (Figure 39)
15. Put the piston in Cylinder 1 to TDC compression position
(a)Turn crankshaft pulley to align its notch to the timing mark "0"
on the timing belt cover. See (Figure 40).
(b) Check if the "K" mark on camshaft timing pulley and the timing mark
on the bearing cap are aligned. Crank the crankshaft for 360 degrees
if not. See (Figure 41).
16. Remove crankshaft pulley
17. Remove timing belt cover
18. Remove crankshaft gear or pulley cover sub-assembly
19. Remove timing belt cover sub-assembly
Figure 40 Figure 39 Figure 38
Figure 41
Page 27 of 392

20(c) Check timing belt for deflection
Check the belt distorn as shown in the figure.
Belt deflection:
20N: 5~6mm
Re-adjust the idler if the deflection does not comply with the regulation.
25. Install timing belt guide wheel. See (Figure 46)
Install guide, place the cup side outward.
26. Install timing belt cover sub-assembly
Torque: 9.3N. m
27. Install crankshaft gear or pulley cover sub-assembly
Torque: 9.3N. m
28. Install timing belt cover
Torque: 9.3N. m
29. Install crankshaft pulley. See (Figure 47)
(a) Align pulley lock key and pulley key groove. Install pulley.
(b) Install pulley bolt Torque: 127N. M
30. Install generator assembly
31. Install water pump pulley
32. Install power steering pump V-belt
33. Install A/C compressor fan to crankshaft pulleyV-belt
34. Install cylinder head cover sub-assembly.
(a) Wipe off all seal packing material.
(b) Apply the seal glue on cylinder head cover as shown in Figure 48.
(c) Install gasket onto cylinder head cover.
(d) Install cylinder head cover with 4 seal gaskets and 4 nuts.
Torque: 7.8N. M
(e) Install 2 ventilation hoses onto cylinder head cover.
(f) Install engine wire harness onto cylinder head cover.
(g) Connect generator wire joint.
(h) Connect generator wire.
(i) Connect oil pressure switch connector.
(j) Install wire clip.
(k) Connect A/C compressor switch connector.
35. Hoist the engine back into the compartment
36. Install left & right rear engine mounting brackets
37. Install ignition coil and high pressure cable
38. Install air filter assembly with hoseFigure 48Figure 46
Figure 47
Page 29 of 392
22Section 4 Camshaft ReplacementFigure 49Vane-Type Pump V-Belt
V/ Power Steering
Fan & Generator V-BeltHigh Pressure CableVentilation Pipe
V-Belt No.1
Cylinder Head
Cylinder
Head Gasket
Crankshaft Bearing Cap
Crankshaft Timing Belt WasherCrankshaft Counter GearWave GasketSnap RingCamshaftCamshaft No. 2Oil Seal
Camshaft Timing Pulley
Fan PulleyGenerator AssemblyCrankshaft Or Pulley
Cover Sub-AssemblyTiming Belt
Cover No. 2Air Filter Assembly W/ HoseRight Engine MountingSeal