Wrangler 4WD L4-150 2.5L VIN P MFI (1998)
Intake Manifold: Service and Repair
Installation
1. Clean the intake manifold and cylinder head mating surfaces. DO NOT allow foreign material to enter either the intake manifold or the ports in the
cylinder head.
2. Install the new intake manifold gasket over the locating dowels.
3. Position the manifold in place and finger tighten the mounting bolts.
4. Tighten the fasteners in sequence and to the specified torque.
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Fastener No.1-Tighten to 41 Nm (30 ft. lbs.) torque.
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Fasteners Nos. 2 through 7-Tighten to 31 Nm (23 ft. lbs.) torque.
5. Connect the fuel return and supply tube to the connector next to the fuel rail. Push them into the fitting until a click is heard. Verify that the
connections are complete.
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First, ensure only the retainer tabs protrude from the connectors.
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Second, pull out on the fuel tubes to ensure they are locked in place.
6. Connect the molded vacuum hoses to the vacuum port on the intake manifold and the cylinder head cover.
7. Connect the electrical connectors.
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The throttle position sensor.
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The automatic idle speed control motor.
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The coolant temperature sensor at the thermostat housing.
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The fuel injectors.
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The air manifold temperature sensor.
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The oxygen sensor.
8. Connect the Crankcase Ventilation (CCV) vacuum hose and Manifold Absolute Pressure (MAP) sensor vacuum hose connectors to the throttle
body.
9. Install the power steering pump and bracket assembly to the water pump and intake manifold.
10. Connect the accelerator cable and cruise control cable to the holddown bracket and the throttle arm.
CAUTION: Ensure that the accessory drive belt is routed correctly. Failure to do so can cause the water pump to turn in the opposite direction
resulting in engine overheating.
11. Tension the accessory drive belt.
12. Connect the air inlet hose to the throttle body and the air cleaner.
13. Connect the battery negative cable.
14. Start the engine and check for leaks.
