Chrysler R5633403 Head-Cylinder 3.3 And 3.8L

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It is also important to allow the engine to cool before you let go of the cylinder head bolts. Starting with the elimination of the negative terminal of the battery connection, then the intake manifold must be removed. Remove all wires and vacuum hoses that are on the cylinder head(s), additional put labels on all to help with reconnection process. Disconnect the ignition wires and spark plugs with plug wires being labeled preferably. Remove the exhaust manifold bolted to the to be removed cylinder head and unbolt the valve cover(s). Take out the rocker arms and the pushrods. Taking a new head gasket, draw cylinders and the bolt pattern on cardboard with the front of the engine mentioned, and mark the bolt holes. Turn each of the cylinder head mounting bolt about 1/4 turn in an anti-clockwise direction, keep removing the bolts in the sequence opposite to the tightening sequence, and put all the bolts in the cardboard holder for re-use. Loosen the head(s) from the engine, be very gentle because there is no need to pry between the head and the block. If resistance is encountered get a feel for possibly missed head bolts and employ the hammer and wood method to crack the gasket surface and be careful of dowel pins. After removal freese the head on wooden blocks to prevent any damages to the gasket surfaces. For installation it is important that the mating surfaces of each cylinder head and block be free of anycarbon and old gasket material that, using the gasket scraper, they should be cleaned thoroughly with lacquer thinner or acetone. Sprinkle shop rags on top of the litter valley so that no debris goes into the engine and eliminate any that falls into the cylinders. Examine the block and head mating surfaces for wear and tear, take with a file for minor deviation and for significantly distorted, turn to machining. Clean up the threads in the head bolt holes with a tap of the right size to guarantee the right torque figure. Align the new gasket over the dowel pins in the block such that, if the block has any markings, they face the appropriate way. Arranging the head gently on the block so that the gasket does not slip and examined the cylinder head bolts for elongation, and replace them if they are. Torque the bolts to a 45 ft-lbs and in the specified sequence and torque again to 65 ft-lbs. Turn each of them (except one) an additional 90-degrees beyond the initial torque, and do not use the torque wrench on this step, turn the last of them to 25 ft-lbs. Do all of the rest of the steps in reverse order that they came off and do the oil and filter.

Position the valve springs and shims, if used, over the valves, compress the springs with a valve spring compressor, and carefully install the keepers in the groove. Then slowly release the compressor to ensure the keepers seat properly. A small dab of grease can be applied to each keeper to hold it in place if necessary.

It is important to inspect the cylinder head(s) to assess any damage, especially if the engine was severely overheated, as this may cause the cylinder head to warp.

Ensure it meets specifications; any valve with a margin narrower than specified must be replaced.

Set the cylinder head in position and install the bolts, tightening them in four steps while following a specific sequence to the required torque.

Use a spring compressor to compress the springs on the first valve and remove the keepers. Then, carefully release the compressor and take out the retainer, spring, and spring seat if applicable. Pull the valve out of the head and remove the oil seal from the guide. If the valve binds, push it back and deburr the area around the keeper groove. Repeat this for the remaining valves, ensuring all parts for each valve are kept together.

Store the head bolts in cardboard holders marked to indicate the bolt pattern, labeling them F (front) and R (rear) while indicating the timing belt end of the engine.

Built-up scale from the coolant passages must be removed, and a stiff wire brush should be run through various holes to eliminate any deposits.

Check for wear and cracks, replacing any questionable parts to prevent extensive damage during engine operation.

Disassembly involves removing the intake and exhaust valves along with related components. For 2.5L or 3.0L engines, the camshafts and housings must be removed first.

Stuff the cylinders with clean shop rags and use a vacuum cleaner to remove any material that falls into the cylinders.

Position the new gaskets over the dowel pins on the block, carefully place the heads on the block without disturbing the gaskets, and lightly oil the threads.

Apply moly-base grease to the rocker arm faces and the shaft.

Inspect for damage, using a file for slight imperfections or considering machining for excessive damage.