Jeep 5184332AA Valve Adjustor

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To further accessorize the valve cover, begin by unplugging the timing belt cover, timing belt, and camshaft sprockett; if you can use extra time, then unwind the camshaft sprockett and tether it with a wire, but it stays attached to the belt and has tension. Five bearing caps support the camshaft and are fastened with two bolts each ; these caps are numbered from 1 to 5 starting from the drivebelt side of the engine block; if such numeration is missing it is advisable to make some marks to facilitate reinstallation. Also, label the rocker arms as well as the lash adjusters for effectiveness during the time of reassembling the vehicle. Take out the bolts of all the bearing caps, but keep only numbers 2 and 4 tight, though loosened to take off strain on the valve springs. Any of the caps may stick and this should not be forced since it may damage the camshaft or housing, use a soft-face hammer to tap them into place. When the camshaft is removed and cleaned, then remove all the rocker arms and the lash adjuster and put them in bags with corresponding labels. For inspection it can be done by fixing camshaft with the help of caps 1 and 5, inserting a dial indicator and checking movement of the camshaft and compare it with specified value. To check camshaft runout, stand it and revolve it using V-block and, at the same time, observe the fluctuations of the indicator. Check journals and caps of the bearings for wear and change the parts if worn out and also consider the condition of the cam lobes, getting to the root cause of the worn out cam shaft. Rocker arms and hydraulic lash adjusters should be examined for their condition; before installing new parts, any problems with lubricants must be resolved. For installing, all the parts must be cleaned and the lash adjusters and the rocker arms must be lubricated before they can be placed in their respective positions as before. Coat lightly with a thin film of oil the camshaft bearing surfaces and proceed with the installation of the camshaft on the cylinder block making sure of its proper alignment. In this position, the extended part fits into the castellated seat of the bearing cap and the respective lube should be applied on the bearing cap and positioned before tightening in a progressive measure. It is advised that anaerobic-type sealant should be applied on the contact surfaces of the end caps and that the fasteners should be tightened in a star or cross fashion. Last but not the least, replace the camshaft sprocket, timing belt and such other components; to make certain that the valve timing is accurate, rotate the crankshaft two times after installing all these parts. In case, any resistance is felt while rotating it then the valve timing should be checked at once.

Ensure the notches in the rocker arm shafts face up during assembly to prevent damage.

Inspect each rocker arm for wear, cracks, and damage, ensuring that the rollers turn freely and that the lash adjuster contact surfaces are intact.

Ensure the notches in the left rocker arm shafts face up and towards the front of the engine, while those in the right rocker arm shafts face up and towards the rear.

Inspect the lash adjuster contact surfaces for wear or damage, confirming that they move freely in their bores without excessive side-to-side play.

The upper intake manifold and the valve cover(s) need to be removed.

The only alternative involves major disassembly of the engine and surrounding components by removing the timing chains and camshafts.

The MOS is a system equipped in some engines that uses a specialized camshaft. When replacing the camshaft, it should only be replaced with one that is compatible with the MOS design. Additionally, if the camshaft is replaced, all lifters must also be replaced.

While holding the check ball down, move the rocker arm up and down to check for freeplay. There should be a small amount of movement; if there is no freeplay, you should replace the adjuster with a new unit.

A noisy valve lifter can be identified when the engine is idling by using a mechanic's stethoscope or a length of hose to listen near each valve location. Alternatively, removing the valve cover and touching each valve spring retainer while the engine is idling can reveal defects through the shock felt at the retainer.

Label and store them separately.

A new camshaft must also be installed.

For camshaft and tappet installation, a special tappet installation tool is required to seat the new tappets into their bores before inserting the camshaft. Lubricate the camshaft thoroughly and insert it into the block, aligning timing marks on the camshaft gear and crankshaft gear. Secure the camshaft thrust plate bolts, ensuring the camshaft is not pushed too far into the block.