Jeep 5184378AF Engine Exhaust Camshaft Right

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Some engines above are provided with Multiple Displacement System (MOS) utilizing a particular camshaft, and the camshaft should be replaced with the intended camshaft type MOS. If the camshaft is replaced, all Lash Adjusters must also be replaced because they will have worn when the camshaft was worn and will continue to wear as the new camshaft wears. First, drain off the fuel system pressure and then, detach the connection of the negative terminal of the battery. On 2015 and later models with an Intelligent Battery Sensor (IBS), this connector should first be disconnected. Pull the coolant, next you remove the timing chain cover, timing chain and sprockets, cylinder heads and radiator. The Lash Adjuster rail mounting bolts to be detached from the engine block as well the Lash Adjusters which ought to be labeled so that the position of each of them may be ascertained. The Lash Adjusters might require a special tool for the removal, though, they can also be removed by a magnet or fingertips. It is recommended not to use pliers, in case of it, if the Lash Adjusters are to be changed, as this will cause their damage. For the 6.4L engines with the MOS, this may require correct deactivating roller Lash Adjusters in some cylinder. Before you uninstall the camshaft, use a dial indicator to gauge the endplay so as to document the movement. Loosen and take out the camshaft thrust plate, to take out camshaft, support it around the block area. Post extraction, degrease the camshaft and check bearings for wear or damage of journals because if the journals are worn or damaged then the camshaft and bearings may have to be replaced. The bearing journals and cam lobe heights should be measured to determine whether or not they have worn out excessively. It is also possible to check the camshaft lobes for discoloration and wear and the Lash Adjusters are to be cleaned. However, if new Lash Adjusters are used, the new camshaft has to be used likewise: do not reinstall used Lash Adjusters where the original camshaft has been removed. Grease the camshaft bearing journals and lobes and then gently push the camshaft into the engine. Fit in the camshaft thrust plate along with the timing chain in a correct manner so that the correct timing mark is achieved. Clean the Lash Adjusters with clean engine oil and re-installation of the Lash Adjusters in their rightful positions, and after that one fits the Lash Adjuster rail and tightens the mounting bolts. Perform what is known as the reverse of the removal steps, replenish the oil and filter, the cooling system, and after turning on the engine to check for oil pressure and leakage. If new components are added, it is necessary to idle the engine at about 2000 RPM for 15 to 20 minutes in order to seat them, and the oil and new filter after 500 miles.

It separately applies to 3.3L/3.8L V6 engines only. Start with molybase grease or engine assembly lube to the camshaft bearing journals as well as the cam lobes and make sure that cam lobes and journals are richly coated. After that, slide the camshaft in the engine, so that it supports it at the block nearby but do not scratch the bearings. Last but not the least; fit the thrust plate and bolts and then torque the bolts to the recommended value.

Remove the camshaft sprocket bolt and detach the sprocket.

Remove the special tool, install the timing chain and sprocket, and complete the installation in reverse order, filling the engine with oil.

The camshaft must be replaced.

It is crucial to double-check all work before starting the engine.

Apply moly-based engine assembly lubricant to the camshaft lobes and journals, ensuring the rocker arms are properly seated.

Double-check all work to ensure correctness before starting the engine.

The final component to remove is the rocker arm assembly.

Apply moly-based engine assembly lubricant to the camshaft lobes and journals, ensuring the rocker arms are properly seated.

Install the bearing caps and tighten them in sequence, then verify the alignment holes are in the neutral position.

Before starting the engine, rotate the crankshaft by hand to ensure there is no resistance, indicating potential issues.

The remaining steps follow the reverse order of the removal procedure.

Verify the markings on the camshaft bearing caps, ensuring they are marked from 1 to 5 with an "I" or "E" for intake or exhaust, and check for arrow marks indicating the front of the engine.

Mark the rocker arms and lash adjusters before removal to maintain their positions during reassembly.

Inspect the camshaft bearing surfaces for damage and measure the camshaft lobe heights. Additionally, check the rocker arms and shafts for wear and replace any defective parts.

Remove all tappet retaining dowels or clamps and proceed with the reassembly of pushrods, rocker arms, and other components. Adjust the valve clearance and complete the installation process, including changing the engine oil and filter. If the side cover was removed, install it with a new gasket.

Inspect the bearings in the block for damage, using a small hole gauge and micrometer to determine the inside diameter and calculate oil clearance. Excessive clearance indicates the need for new bearings.

After marking the chain links and sprockets, you should loosen the camshaft sprocket bolts and then retighten them by hand.

Relieve the fuel system pressure and disconnect the battery.

Each camshaft lobe height should be measured with a micrometer and compared to the specified height. Subtract the measured height from the specified height to compute wear on the cam lobes.