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MANIFOLD - INTAKE
DESCRIPTION
The intake manifold is made of a composite material and features long runners which maximizes low end torque.
The intake manifold uses single plane sealing which consist of eight individual press in place port gaskets to prevent
leaks.
DIAGNOSIS AND TESTING - INTAKE MANIFOLD LEAKAGE
An intake manifold air leak is characterized by lower than normal manifoldvacuum. Also, one or more cylinders may
not be functioning.
WARNING: USE EXTREME CAUTION WHEN THE ENGINE IS OPERATING. DO NOT STAND IN ADIRECT LINE
WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE PULLEYS, BELTS OR THE FAN. DO NOT WEAR
LOOSE CLOTHING.
1. Start the engine.
2. Spray a small stream of water at the suspected leak area.
3. If a change in RPM is observed the area of the suspected leak has been found.
4. Repair as required.
REMOVAL
1. Disconnect negative cable from battery.
2. Remove resonator assembly and air inlet hose.
3. Disconnect electrical connectors for the following components:
Manifold Absolute Pressure (MAP) Sensor
Intake Air Temperature (IAT) Sensor
Throttle Position (TPS) Sensor
Coolant Temperature (CTS) Sensor
4. Disconnect brake booster hose and positive crankcase ventilation (PCV)hose.
5. Remove generator and set aside.
NOTE: It is not necessary to remove lines or remove freon from A/C compressor.
6. Remove air conditioning compressor and set aside..
7. Bleed fuel system (Refer to 14 - FUEL SYSTEM/FUEL DELIVERY - STANDARD PROCEDURE).
8. Remove intake manifold retaining fasteners in a crisscross pattern starting from the outside bolts and ending at
themiddlebolts.
9. Remove intake manifold and IAFM as an assembly.
CLEANING
NOTE: There is NO approved repair procedure for the intake manifold. If severe damage is found during
inspection, the intake manifold must be replaced.
Before installing the intake manifoldthoroughly clean the mating surfaces. Use a suitable cleaning solvent, then air
dry.
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INSPECTION
1. Inspect the intake sealing surface for cracks, nicks and distortion.
2. Inspect the intake manifold vacuum hose fittings for looseness or blockage.
3. Inspect the manifold to throttlebody mating surface for cracks, nicks and distortion.
INSTALLATION
1. Install intake manifold seals.
2. Position intake manifold and IAFM.
3. Install intake manifold retaining bolts, and tighten in sequence from the middle bolts towards the outside in a
crisscross pattern. Torque fasteners to 12 Nꞏm (105 in. lbs.).
4. Connect electrical connectors for the following components:
Manifold Absolute Pressure (MAP) Sensor
Intake Air Temperature (IAT) Sensor
Throttle Position (TPS) Sensor
Coolant Temperature (CTS) Sensor
Idle Air Control (IAC) Motor
5. Install generator.
6. Install A/C compressor.
7. Connect Brake booster hose and Positive crankcase ventilation (PCV) hose.
8. Install resonator assembly and air inlet hose.
9. Connect negative cable to battery.
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1. Disconnect negative battery cable.
2. Raise vehicle.
3. Remove exhaust pipe to manifold bolts.
4. Lower vehicle.
5. Install engine support fixture special tool #8534.
6. Raise engine enough to remove manifolds.
CAUTION: Do not damage engine harness while
raising the engine.
7. Remove heat shield.
8. Remove manifold bolts using sequence provided.
9. Remove manifold and gasket.
CLEANING
Clean mating surfaces on cylinder head and manifold. Wash with solvent andblow dry with compressed air.
INSPECTION
Inspect manifold for cracks.
Inspect mating surfaces of manifold for flatness with a straight edge. Gasket surfaces must be flat within 0.2 mm per
300 mm (0.008 inch per foot).
INSTALLATION
EXHAUST MANIFOLD
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1. Install manifold gasket and manifold.
2. Install manifold bolts and tighten using sequence
provided to 25 Nꞏm (18 ft. lbs.).
3. Install heat shield and tighten nuts to 15 Nꞏm (11 ft.
lbs.).
4. Lower engine.
CAUTION: Do not damage engine harness while
lowering the engine.
5. Remove engine support fixture from engine.
6. Raise vehicle.
7. Tighten right and left side engine mount through
bolts.
8. Install exhaust flange to pipe bolts.
9. Lower vehicle.
10. Connect negative battery cable.
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COVER - TIMING
REMOVAL
1. Disconnect the battery negative cable.
2. Remove the engine cover (1).
3. Remove air cleaner assembly.
4. Drain cooling system.
5. Remove accessory drive belt.
6. Remove fan and fan drive assembly (Refer to 7 -
COOLING/ENGINE/FAN DRIVE VISCOUS
CLUTCH - REMOVAL).
7. Remove coolant bottle and washer bottle.
8. Remove fan shroud.
NOTE: It is not necessary to disconnect A/C lines
or discharge freon.
9. Remove A/C compressor and set aside.
10. Remove the generator.
11. Remove upper radiator hose.
12. Disconnect both heater hoses at timing cover.
13. Disconnect lower radiator hose at engine.
14. Remove accessory drive belt tensioner and both
idler pulleys.
15. Remove crankshaft damper (2) (Refer to 9 -
ENGINE/ENGINE BLOCK/VIBRATION DAMPER -
REMOVAL).
NOTE: Do not remove the hoses from the power
steering pump.
16. Remove power steering pump and set aside.
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12. Install radiator lower hose.
13. Install both heater hoses.
14. Install radiator fan shroud.
15. Install the fan and fan drive assembly
16. Install the accessory drive belt.
17. Install the coolant bottle and washer bottle.
18. Install the upper radiator hose.
19. Install the air cleaner assembly.
20. Fill cooling system.
21. Refill engine oil.
22. Connect the battery negative cable.
23. Install the engine cover (1).
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TIMING CHAIN & SPROCKETS
REMOVAL
1. Disconnect battery negative cable.
2. Drain cooling system.
3. Remove Timing Chain Cover (1).
4. Re-install the vibration damper bolt finger tight.
Using a suitable socket and breaker bar, rotate the
crankshaft to align timing chain sprockets and key-
ways as shown.
CAUTION: The camshaft pin and the slot in the
cam sprocket must be clocked at 12:00 (2). The
crankshaft keyway must be clocked at 2:00 (3).
The crankshaft sprocket must be installed so that
the dots and or paint marking is at 6:00.
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11. Install the timing chain cover (Refer to 9 - ENGINE/VALVE TIMING/TIMING BELT / CHAIN COVER(S) -
INSTALLATION).
12. Refill engine oil.
13. Fill cooling system (Refer to 7 - COOLING - STANDARD PROCEDURE).
14. Connect battery negative cable.
15. Start engine and check for oil and coolant leaks.