9 - 100 3.3/3.8L ENGINE		Ä

Fig. 1 3.3/3.8L V-6 Engine

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.

Ä		3.3/3.8L ENGINE 9 - 101

Fig. 3 Engine Mounting

(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.