OEM 2004 Jeep Grand Cherokee Rocker Arm

2004 Jeep Grand Cherokee Rocker Arm Parts and Q&A

• Q: How to Maintain and Repair a Rocker Arm Assembly on 2004 Jeep Grand Cherokee?

  A: To handle the rocker arm and adjustment assembly, take out the cylinder head cover first. Monitor the rocker arm bridges because misalignments in the valve tip region might occur. Loose each bridge's capscrew a thin bit each turn after the bridge rather than vice versa or you may damage the bridges. After taking out the bridges, pivots and set of rocker arms, set them on a bench according to the order they were unbolted and then leave the push rods in the order they were removed. Wash every part with cleaner and use air to clear the oil moving through the rocker arms and push rods. Review all the rocker arm pivot surfaces, if they appear scuffed, pitted, cracked or are highly worn, get a replacement and inspect the valve stem tip contact point for serious corrosion. Check the condition of every push rod end and if any has worn greatly, replace it along with the related hydraulic tappet due to a lack of oil. Check the shape of the push rods by rolling them on a flat surface or by shining a light between them and a surface, since any wear in the center may show there's possibly a blockage inside the engine cylinder head. While installing, apply some Mopar Engine Oil Supplement (or a suitable equivalent) to the ball ends of the push rods, then place them back where they originally were and see that the bottom end is properly centered in the tappet plunger cap seat. Coat the surface where the rocker arm connects to the pivot with Mopar Engine Oil Supplement or something similar, then fit the rocker arms, pivots and bridges into their places over each cylinder as they were before. Install each capscrew loosely into its bridge then tighten them in an alternating order one turn at a time; this way, your bridge Installer will be able to reach the tightening value of 28 Nm (21 ft. lbs.) before damage can set in. The last step is to replace the engine cylinder head cover.