Jeep 5184379AF Engine Intake Camshaft

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To remove the components, first disconnect the negative battery cable from the remote ground terminal, then remove the valve covers. Next, take out the primary timing chain and the primary camshaft sprockets, followed by the retaining bolts from the secondary timing chain tensioner. 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. Loosen the camshaft bearing caps in reverse order of tightening, keeping them in order for reinstallation. Detach the bearing caps and remove the camshafts, secondary timing chain, and secondary tensioner as an assembly from the cylinder head, noting the differences between intake and exhaust camshafts. Remove the secondary tensioner and timing chain from the camshafts, then inspect the camshaft secondary sprockets for wear, along with the chains and tensioners for any signs of excessive wear that would necessitate replacement. After cleaning the camshaft, inspect the bearing journals for wear and damage, measuring them with a micrometer to check for excessive wear or out-of-round conditions. Measure the lobe height of each cam lobe on the intake camshaft and record the measurements, ensuring that variations do not exceed 0.010 inch (0.254 mm), and repeat the process for the exhaust camshaft. Check the camshaft lobes for any signs of heat discoloration, scoring, or uneven wear, and if they are in good condition, the camshaft can be reused. For installation, align the secondary timing chain(s) over the camshaft sprockets, ensuring the colored links face outward. Create a U-shaped tool from a paperclip to lock the secondary tensioner in place, then install it back between the camshafts and the secondary timing chain. Apply moly-based engine assembly lubricant to the camshaft lobes and journals, ensuring the rocker arms are properly seated. Install the camshafts, secondary tensioner, and timing chain as an assembly in their original position, with the marks on the sprockets and colored links facing up. Install the bearing caps and bolts, tightening them hand tight before following the proper torque sequence for the bearing cap bolts and tensioner mounting bolts. Finally, install the primary timing chain and camshaft sprockets, completing the installation in reverse order of removal.

After removing the valve covers, rotate the crankshaft to place the #1 piston at TDC on the exhaust stroke, ensuring the camshaft phaser markings are correctly aligned. Mark the camshaft phasers to the timing chains for reinstallation.

Inspect the contact and sliding surfaces of each hydraulic lash adjuster for scoring or damage. Any defective parts should be replaced.

Install a new seal at the front of the head using a seal driver or deep socket.

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

The camshaft can be reused.

The first step is to take off the valve cover.

Slide the phaser onto the camshafts, install and tighten the bolt, dip the lifters in clean engine oil, lubricate the camshaft bearing journals, and set the timing chain over the exhaust phaser sprocket.

You need to remove the timing chain cover, timing chain, sprockets, cylinder heads, and radiator. After that, remove the lifter rail mounting bolts and lifters from the engine block, ensuring each lifter is marked for its original position.

The timing system is complex, and severe engine damage will occur if mistakes are made. Only highly experienced individuals should attempt this procedure, and if there is any uncertainty, consulting an expert is advised.

Drain the engine oil and coolant.

Remove the retaining bolts from the secondary timing chain tensioner.

Inspect the bearing journals and caps for wear, replacing parts as necessary, and check cam lobes for wear, ensuring to investigate the cause of any wear before replacing the camshaft.

This procedure applies to the 3.3/3.8 liter engine only.

Remove the ignition coils and spark plugs, followed by the valve covers. Then, release the tensioner using special tools and remove the camshaft phasers. Loosen and remove the oil control valves from the camshafts and slide off both the intake and exhaust phasers. Rotate the camshafts counterclockwise to a neutral position and remove the camshaft bearing cap bolts. Lift the camshafts from the cylinder head. Remove and mark the rocker arms and hydraulic lash adjusters.

Remove the bolts and gently pry off the distributor drive adapter.

Clean the lifters and check for scuffing and wear on the lifter walls, pushrod seats, and roller lifters.

The final steps include: Cleaning and lubricating the camshaft sprocket bolts and installing them. Removing the timing chain wedge(s). Installing the CMP sensor. Installing the valve covers. Finally, connecting the cable to the negative terminal of the battery.

Take out the primary timing chain and the primary camshaft sprockets, followed by the retaining bolts from the secondary timing chain tensioner.

Molybase grease or engine assembly lube should be used to lubricate the camshaft bearing journals and cam lobes.

Finally, have the air conditioning system evacuated, recharged, and leak-tested by a professional shop.