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EXHAUST MANIFOLDS REMOVAL (1) Raise vehicle and disconnect exhaust pipe from rear (cowl side) exhaust manifold at articulated joint. (2) Disconnect Oxygen Sensor lead wire at the rear exhaust manifold (Fig. 18). (3) Remove bolts attaching cross-over pipe to man- ifold (Figs. 2 and 19). (4) Remove nuts attaching rear manifold to cylin- der head and remove manifold. (5) Lower vehicle and remove screws attaching front heat shield to front manifold (Fig. 2). (6) Remove bolts fastening crossover pipe to front exhaust manifold and nuts fastening manifold to cyl- INSPECTION Inspect exhaust manifolds for damage or cracks and check distortion of the cylinder head mounting INSTALLATION Install the gaskets with the numbers 1-3-5 em- bossed on the top on the rear bank and those with (1) Install rear exhaust manifold and tighten at- taching nuts to 20 N Im (175 in. lbs.). Fig. 15 Intake Plenum and Cylinder Head Mounting Surface Specifications Fig. 16 Nut Tightening Sequence for Intake (Cross) Manifold Fig. 17 Intake Plenum Tightening Sequence Fig. 18 Separate Articulated Joint, Disconnect Oxygen Sensor Wire Fig. 19 Crossover Pipe 11 - 18 EXHAUST SYSTEM AND INTAKE MANIFOLD Ä |