Файл: 92FWD_9.pdf

GENERAL INFORMATION

ENGINE INDENTIFICATION NUMBER OR CODE

The engine identification number is located on the rear of the cylinder block just below the cylinder head (Fig. 2).

ENGINE: The 3.3L (201 Cubic. Inches.) and 3.8L (231 Cubic. Inches.) displacement engines are 60° V type six cylinder power plant with cast iron cylinder block and aluminum cylinder heads. (Fig. 1). Firing order for these engines is 1-2-3-4-5-6. High turbulence cylinder heads allow a 8.9-1 compression ratio.

CRANKSHAFT: The nodular iron crankshaft is supported by four main bearings, with number two

being the thrust bearing. Crankshaft end sealing is provided by front and rear rubber seal.

PISTONS: The pistons are cast aluminum alloy. Three rings are used. Piston pins, press fitted into place, join the pistons to forged steel connecting rods.

CAMSHAFT: The nodular iron camshaft is mounted in four steel backed babbitt bearings. A thrust plate located in front of the first bearing, and bolted to the block, controls end play. Silent timing chain drives the camshaft. This chain is enclosed by a cast aluminum cover which also carries a front crankshaft seal, provides front oil pan closure, water pump mounting.

Fig. 2 Engine Identification

CYLINDER HEADS: Cylinder heads incorporate valve shrouding to create turbulence-producing combustion chambers, described as fast burn. Valve seat and guides are inserts. A steel flanged composition type gasket is used between head and block.

VALVE COVERS: The covers are sealed with steel reinforced silicon rubber gaskets.

INTAKE MANIFOLD: The intake manifold is a tuned two-piece semi-permanent mold aluminum

casting with individual primary runners leading from a plenum to the cylinders. The manifold is designed to boost torque in the 3600 rpm range and contributes to the engine's broad, flat torque curve, which was desired for excellent engine tractability, response and usable power output.

The intake manifold is also cored with upper level EGR passages for balanced cylinder to cylinder EGR distribution.

VALVE TRAIN: Valve train design incorporates the use of hydraulic roller tappets. Rocker arms are installed on a rocker arm shaft attached to the cylinder head with four bolts and retainers. Viton valve stem seals provide valve sealing. Conventional type pushrods, retainers and valve stem locks are used. Unique beehive style valve spring are used with lightweight retainers for improved high RPM performance.

EXHAUST MANIFOLDS: Exhaust manifolds are log type with a crossover and is attached directly to the cylinder heads.

ENGINE MOUNTS

REMOVAL AND INSTALLATION

RIGHT SIDE MOUNT

(1)Remove the right engine mount insulator vertical fasteners from frame rail.

(2)Remove the load on the engine motor mounts by carefully supporting the engine and transmission assembly with a floor jack.

(3)Remove the thru bolt from the insulator assembly. Remove insulator.

(4)Reverse removal procedure for installation. Refer to (Fig. 3) for bolt tightening specifications.

(5)Engine mount adjustment, Refer to Engine Mount Insulator Adjustment of this section.

FRONT MOUNT

(1)Support the engine and transmission assembly with a floor jack so it will not rotate.

(2)Remove the thru bolt from the insulator and front crossmember mounting bracket.

(3)Remove the front engine mount bracket to front crossmember screws and nuts. Remove the insulator assembly.

(4)Reverse removal procedure for installation. Refer to (Fig. 3) for bolt tightening specifications.

(5)Engine mount adjustment, Refer to Engine Mount Insulator Adjustment of this section.

LEFT SIDE MOUNT

(1)Raise vehicle on hoist and remove left front wheel.

(2)Remove inter splash shield.

(3)Support the transmission with a transmission

jack.

(4)Remove the insulator thru bolt from the mount.

(5)Remove the transmission mount fasteners and remove mount.

(6)Reverse removal procedure for installation. Refer to (Fig. 3) for bolt tightening specifications.

(7)Engine mount adjustment, Refer to Engine Mount Insulator Adjustment of this section.

ENGINE MOUNT RUBBER INSULATORS

Insulator location on yoke bracket to engine plate (right side) and transmission bracket (left side) are adjustable to allow right/left drive train adjustment in relation to drive shaft assembly length.

Check and reposition right engine mount insulator (left engine mount insulator is floating type and will adjust automatically (Fig. 4). Adjust drive train position, if required, for the following conditions:

²Drive shaft distress: See Driveshafts in Suspension, Group 2.

²Any front end structural damage (after repair).

²Insulator replacement.

ENGINE MOUNT INSULATOR ADJUSTMENT

(1) Remove the load on the engine motor mounts by carefully supporting the engine and transmission assembly with a floor jack.

9 - 102 3.3/3.8L ENGINE

(2)Loosen the right engine mount insulator yoke screw and 2 turns on yoke nut, then loosen the front engine mount bracket to front crossmember screws and nuts.

Left engine mount insulator is sleeved over shaft and long support bolt to provide lateral movement adjustment with engine weight removed or not.

(3)Pry the engine right or left as required to achieve the proper drive shaft assembly length. See Drive Shaft in Suspension Group 2 for driveshaft identification and related assembly length measuring.

(4)Tighten right engine mount insulator yoke nut to 102 Nzm (75 ft. lbs.). Then tighten front engine mount screws and nuts to 54 Nzm (40 ft. lbs.) and center left engine mount insulator.

(5)Recheck drive shaft length.

Fig. 4 Left Insulator Movement

ENGINE ASSEMBLY

REMOVAL

(1)Disconnect battery.

(2)Mark hood position at hinges and remove hood.

(3)Drain cooling system. Refer to Cooling System, Group 7 for procedure.

(4)Disconnect all electrical connections.

(5)Remove coolant hoses from radiator and engine.

(6)Remove radiator and fan assembly.

(7)See Fuel System, Group 14, to release fuel pressure. Disconnect fuel lines and accelerator cable.

(8)Remove air cleaner assembly.

(9)Hoist vehicle and drain engine oil.

(10)Remove air conditioning compressor mounting bolts and set compressor aside.

(11)Disconnect exhaust pipe at manifold.

(12)Remove transmission inspection cover and mark flex plate to torque converter position. For disassembly procedure for the all wheel drive vehicle refer to Group 21 Transaxle.

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(13)Remove screws holding torque converter to flex plate and attach C-clamp on bottom of converter housing to prevent torque converter from counting out.

(14)Remove power steering pump mounting bolts and set pump aside.

(15)Remove two lower transmission to block screws.

(16)Remove starter.

(17)Lower vehicles and disconnect vacuum lines and ground strap.

(18)Install transmission holding fixture.

(19)Attach engine lifting hoist and support engine.

(20)Remove upper transmission case to block bolts.

(21)See Engine Mounting in (Fig. 3) and separate mount/insulators as follows:

(a)Mark RIGHT insulator on right rails supports. Remove insulator to rails screws.

(b)Remove FRONT engine mount through bolt and nut.

(c)Remove LEFT insulator through bolt from inside wheelhouse or insulator bracket to transmission screws.

(22)Remove engine.

INSTALLATION

(1)Attach hoist and lower engine into engine compartment.

(2)Align engine mounts and install but do not tighten until all mounting bolts have been installed. Tighten bolts to torque specified in (Fig. 3).

(3)Install transmission case to cylinder block, tighten bolts to 102 Nzm (75 ft. lbs.) torque.

(4)Remove engine hoist and transmission holding fixture.

(5)Remove C-clamp from torque converter housing. Align flex plate to torque converter and install mounting screws. Tighten to 75 Nzm (55 ft. lbs.) torque. Refer to Group 21 transaxle for the all wheel drive installation procedure.

(6)Install transmission inspection cover.

(7)Connect exhaust system at manifold.

(8)Install starter.

(9)Install power steering pump and air conditioning compressor. For belt installation see Accessory Belt Drive in Cooling System Group 7.

(10)Lower vehicle and connect all vacuum lines.

(11)Connect all electrical connections including ground strap.

(12)Connect fuel lines and accelerator cable.

(13)Install radiator and fan assembly. Reconnect fan motor electrical lead. Reinstall radiator hoses. Fill cooling system. See Cooling System Group 7 for filling procedure.

(14)Fill engine crankcase with proper oil to correct

level.