CYLINDER HEAD GASKET REPLACEMENT [MZI-3.7]
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1. Drain the engine oil. (See ENGINE OIL REPLACEMENT [MZI-3.7].)
2. Remove the engine and transaxle component. (See ENGINE REMOVAL/INSTALLATION [MZI-3.7].)
3. Secure the engine and transaxle component using a hoist and the SST.
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4. Remove the dynamic chamber and throttle body as a single unit. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZI-3.7].)
5. Remove the fuel injector and fuel distributor together as a single unit. (See FUEL INJECTOR REMOVAL/INSTALLATION [MZI-3.7].)
6. Remove the thermostat and thermostat housing together as a single unit. (See THERMOSTAT REMOVAL/INSTALLATION [MZI-3.7].)
7. Remove the Intake manifold. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZI-3.7].)
8. Remove both WU-TWCs together with both exhaust manifolds as a single unit. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [MZI-3.7].)
9. Remove the ignition coils. (See IGNITION COIL REMOVAL/INSTALLATION [MZI-3.7].)
10. Remove the dipstick.
11. Remove the power steering oil pump drive belt. (See DRIVE BELT REMOVAL/INSTALLATION [MZI-3.7].)
12. Remove the power steering oil pump. (See POWER STEERING OIL PUMP REMOVAL/INSTALLATION [L.H.D.].) (See POWER STEERING OIL PUMP REMOVAL/INSTALLATION [R.H.D.].)
13. Remove the generator. (See GENERATOR REMOVAL/INSTALLATION [MZI-3.7].)
14. Remove the OCV component (LH) (RH). (See TIMING CHAIN REMOVAL/INSTALLATION [MZI-3.7].)
15. Remove in the order indicated in the table.
16. Install in the reverse order of removal.
17. Start the engine and:
18. Perform a road test.
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1
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Timing chain component
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2
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Camshaft cap (LH)
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3
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Camshaft timing chain tensioner (LH)
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4
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Camshaft timing chain (LH)
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5
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Camshaft component (LH)
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6
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Camshaft cap (RH)
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7
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Camshaft timing chain tensioner (RH)
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8
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Camshaft timing chain (RH)
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9
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Camshaft component (RH)
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10
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Cylinder head (LH)
(See Cylinder Head Removal Note.)
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11
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Cylinder head gasket (LH)
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12
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Cylinder head (RH)
(See Cylinder Head Removal Note.)
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13
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Cylinder head gasket (RH)
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Timing chain Component Removal Note
1. Turn the crankshaft clockwise so that the crankshaft keyway is in the 11 o’clock position. (This will position the No.1 cylinder at TDC.)
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2. Mark the timing chain at the position of each timing sprocket timing mark.
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3. Mark the camshaft timing chain at the positions where it is aligned with each of the camshaft sprocket on both banks.
LH
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RH
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4. Remove the timing chain in the following order.
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Camshaft Component Removal Note
1. Rotate the crankshaft counterclockwise until the keyway is in the 9 o'clock position.
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2. Slowly compress the camshaft timing chain tensioner (LH) piston by hand.
3. Insert an approx. 1.0 mm {0.039 in} thin wire or paper clip into the camshaft timing chain tensioner (LH) shown in the figure to hold the tensioner piston.
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4. Verify that the camshafts (LH) are in the neutral position.
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5. Loosen the LH bank camshaft cap bolts in several passes in the order shown in the figure and remove the camshaft cap.
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6. Remove the camshaft, camshaft sprocket, camshaft timing chain, and camshaft timing chain tensioner of the LH bank as a single unit.
7. Slowly compress the camshaft timing chain tensioner (RH) piston by hand.
8. Insert an approx. 1.0 mm {0.039 in} thin wire or paper clip into the camshaft timing chain tensioner (RH) shown in the figure to hold the tensioner piston.
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9. Put a wrench to the position shown in the figure on the RH bank camshaft, rotate the RH bank camshaft counterclockwise, and set the camshaft to the neutral position.
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10. Loosen the RH bank camshaft cap bolts in several passes in the order shown in the figure and remove the camshaft cap.
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11. Remove the camshaft, camshaft sprocket, camshaft timing chain, and camshaft timing chain tensioner of the RH bank as a single unit.
Cylinder Head Removal Note
1. Loosen the cylinder head bolts in several passes in the order shown.
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Cylinder Head Installation Note
1. Tighten the cylinder head bolts in the order in 6 steps in the order shown in the figure.
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Tightening torque
Step |
Installation position |
Tightening torque |
---|---|---|
1
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1—16
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20 N·m {2.0 kgf·m, 15 ft·lbf}
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2
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1—16
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35 N·m {3.6 kgf·m, 26 ft·lbf}
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3
|
1—16
|
90 °
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4
|
1—16
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90 °
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5
|
1—16
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90 °
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6
|
17, 18
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8.5—11.5 N·m {87—117 kgf·cm, 76—101 in·lbf}
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Camshaft Component Installation Note
1. Assemble the camshaft timing chain tensioners on both sides.
2. Install the camshaft component (RH).
RH
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3. Install the camshaft component (LH).
LH
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4. Turn the crankshaft clockwise so that the crankshaft keyway is in the 11 o’clock position. (This will position the No.1 cylinder at TDC.)
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Timing chain Component Installation Note
1. Follow the “TIMING CHAIN REMOVAL/INSTALLATION” procedure and install the timing chain. (See TIMING CHAIN REMOVAL/INSTALLATION [MZI-3.7].)