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31Replacement1. Disconnect all the wire harnesses and the cables on the engine connected to the car body.
2. Detach air filter assembly with hose
3. Disconnect oil pipe and water hose
4. Loose positive and negative cables of the battery.
5. Detach propeller shaft. Detach front exhaust pipe assembly
6. Loose engine left & right rear brackets after hoisting the engine.
7. Disconnect all the other connectors between the engine and the car body.
8. See "Provision 20, Section 2, Chapter 2". Lift the car body and take out the engine assembly.
9. Remove A/C compressor to the crankshaft pulleyV-belt.
10. Remove power steering pump V-belt.
11. Detach water pump fan pulley.
12. Disconnect ignition coil and high voltage cable.
13. Detach cylinder head cover sub-assembly.
14. Detach generator assembly.
15. Detach the camshaft.
16. Detach the throttle body assembly
17. Detach intake manifold stay No. 2.
18. Take out the dipstick
19. Detach No. 1 fuel delivery pipe
20. Detach the wire harness.
21. Detach the steering assisting pump assembly
22. Detach exhaust manifold. See (Figure 71)
23. Pry cylinder head from the dowel pin on the cylinder block.
See (Figure 72)
24. Remove the cylinder head gasket.
25. Install cylinder head gasket
26. Install cylinder head sub-assembly
27. Install exhaust pipe assembly.
(a) Install the new gasket and exhaust manifold with 5
bolts. Torque: 34N. m
(b) Install exhaust manifold stay with 2 bolts.
(c) Install upper heat shield with 4 bolts
Torque: 17N. mFigure 71
Figure 72
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35Chapter 3 Lubrication System
(MR479Q, MR479QA, MR481QA)Section 1 Oil Pressure Gage Sensor Replacement1. Check oil level
Warm up the engine. Check the dipstick to ensure oil level between "L" and "F" after engine stopped
5 minutes. Check for leakage if it is too low. Fill oil to "F.
2. Check oil for deterioration. Water entry, discolor and dilution. Replace oil if it is obviously
deteriorated.
3. Detach oil pressure sensor assembly. See (Figure 80)
4. Install oil pressure gage sensor. See (Figure 81) Start engine to
normal operation temperature.
5. Check for oil pressure
6. Smear adhesive on 2 or 3 threads of the oil pressure sensor.
Install oil pressure sensor. See (Figure 82)
Figure 81
Figure 82Figure 80
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36Section 2 Oil Pump Assembly Replacement1. Remove timing belt
2. Remove timing belt idler sub-assembly
3. Detach crankshaft timing pulley. See (Figure 74)
4. Remove the dipstick guide
5. Detach oil sump sub-assembly. See (Figure 83)
6. Detach oil strainer sub-assembly. See (Figure 84)
7. Detach oil pump assembly. See (Figure 85)
8. Remove oil pump oil seal
9. Install oil pump oil seal
10. Install oil pump assembly
11. Install oil strainer sub-assembly
12. Install oil sump assembly. See (Figure 86)
Figure 84
Figure 85Figure 83Figure 86
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3713. Install the dipstick guide. See (Figure 87)
14. Install crankshaft timing pulley. See (Figure 77)
15. Install timing belt idler sub-assembly No.1
16. Install timing belt
17. Fill in engine oil
18. Check oil for leakage
Figure 87
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54Section 2 Water Pump, Thermostat and Radiator ReplacementHoist the engine from the compartment. See "Provison 20, Section 2, Chapter 2".
1. Replace water pump. See (Figure 125)
(1) Drain the coolant.
(2) Detach timing belt.
(3) Detach power steering pump assembly.
(4) Remove the oil dipstick guide.
(5) Detach water pump assembly.
(6) Install water pump assembly.
(7) The installation is in the reverse order of the removal.
2. Replace thermostat
(1) Remove thermostat (See Figure 126).
(2) Install thermostat.
a. Install a new gasket to the thermostat. See (Figure 127).
b.Align the main valve of the thermostat to the top of the
stud. Insert the thermostat into the water inlet case.
Hint:
The main valve is set at around 10°C as shown in the figure. See (Figure 128).
(3) Install inlet connector.
Figure 127 Figure 128
3. Replace radiator
(1) Open radiator cap.
(2) Open the drain valve and drain the coolant.
(3) Detach radiator water inlet hose.
(4) Detach radiator water outlet hose.Figure 125
Figure 126