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(3) Install the relief valve and spring. Insert the cotter pin. (4) Tap on a new retainer cap. rotor cavity with engine oil. INSTALLATION (1) Install oil pump. During installation, slowly rotate pump body to ensure driveshaft-to-pump rotor (2) Hold the oil pump base flush against mating surface on No. 4 main bearing cap. Finger-tighten (3) Install the oil pan (Refer to 9 - ENGINE/LU- BRICATION/OIL PAN - INSTALLATION). INTAKE MANIFOLD DESCRIPTION The aluminum intake manifold (Fig. 75) is a single plane design with equal length runners. This mani- OPERATION The intake manifold, meters and delivers air to the combustion chambers allowing the fuel delivered by DIAGNOSIS AND TESTING—INTAKE 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. leak area. (3) If a change in RPMs occurs, the area of the suspected leak has been found. (4) Repair as required. REMOVAL (1) Disconnect the negative cable from the battery. ING - STANDARD PROCEDURE). (3) Remove the A/C compressor (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING/A/C (4) Remove the generator (Refer to 8 - ELECTRI- CAL/CHARGING/GENERATOR - REMOVAL). (5) Remove the accessory drive bracket. cedure (Refer to 14 - FUEL SYSTEM/FUEL DELIV- Fig. 74 Proper Installation of Retainer Cap 1 - RETAINER CAP Fig. 75 Intake Manifold with Tightening Sequence— 3.9L Engine 9 - 116 ENGINE 3.9L AN OIL PUMP (Continued) |