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CAUTION: The crankshaft sprocket is set to a pre- (7) Install crankshaft sprocket using Special Tool 6792 (Fig. 91). (8) Install oil pump pick-up tube. CATION/OIL PAN - INSTALLATION) (10) Install timing belt rear cover. (Refer to 9 - ENGINE/VALVE TIMING/TIMING BELT / CHAIN (11) Install timing belt. (Refer to 9 - ENGINE/ VALVE TIMING/TIMING BELT/CHAIN AND SPROCKETS - INSTALLATION) INTAKE MANIFOLD DESCRIPTION The intake manifold is a one piece composite mod- ule that attaches to the cylinder head with fasteners. OPERATION The intake manifold delivers air to the combustion chambers. This air allows the fuel delivered by the DIAGNOSIS AND TESTING INTAKE MANIFOLD LEAKS An intake manifold air leak is characterized by lower than normal manifold vacuum. Also, one or WARNING: USE EXTREME CAUTION WHEN THE (1) Start the engine. the suspected leak area. (3) If engine RPM’S change, the area of the sus- pected leak has been found. (4) Repair as required. REMOVAL (1) Disconnect negative cable from battery. ture sensor. (3) Disconnect air intake tube at throttle body and remove upper air cleaner housing. (4) Disconnect connector from throttle position sensor (TPS). (5) Disconnect connector from idle air control (IAC) motor. (6) Disconnect connector from MAP sensor. PCV valve at intake manifold. (8) Remove vacuum lines for power brake booster, LDP, EGR transducer, and speed control vacuum res- (9) Disconnect throttle, speed control (if equipped), and transaxle control (if equipped) and cables from INJECTION/THROTTLE CONTROL CABLE - REMOVAL) (10) Perform fuel system pressure release proce- dure before attempting any repairs. (Refer to 14 - (11) Disconnect fuel line. (Refer to 14 - FUEL SYS- TEM/FUEL DELIVERY/QUICK CONNECT FIT- TING - STANDARD PROCEDURE) (12) Disconnect coolant temperature sensor/fuel injector wire harness connector. (13) Disconnect fuel injector harness. teners. (15) Remove the manifold from engine. Fig. 91 Crankshaft Sprocket - Installation 1 - SPECIAL TOOL 6792 TJ ENGINE 2.4L 9 - 55 OIL PUMP (Continued) |