Toyota 13811-63010 Arm Sub-Assembly, Valve Rocker

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To remove the camshaft, first disconnect the negative cable from the battery and detach the air cleaner inlet duct. Drain the cooling system and label and disconnect all hoses, wires, linkages, tubes, and brackets attached to the camshaft housing, including the heater tube at the rear end housing. Unbolt and remove the rear housing, then take off the timing belt and camshaft pulley. Remove the valve cover and loosen each bolt of the camshaft housing a little at a time. With the camshaft still in the housing, check the endplay using a dial indicator; if it exceeds the limit, replace the camshaft or housing. Detach the camshaft oil seal retainer and remove the camshaft, being careful not to damage the bearings. Pry the O-ring out of the retainer and slowly pull the camshaft out while turning it. Remove the rocker arms and withdraw the lash adjusters, keeping them in order for reinstallation. Visually inspect the camshaft journals and rocker arms for damage and measure the cam lobe height and journal diameter with a micrometer, replacing any worn components. Measure the housing bore and determine the bearing oil clearance, replacing the camshaft and housing if necessary. Before reinstalling, bleed the lash adjusters by immersing them in light oil and using a tool to slide the plunger. Replace any lash adjuster with a new one if the plunger stroke exceeds 0.020-inch after bleeding. Check the camshaft housing for warpage using a straightedge and feeler gauge, replacing it if the warpage exceeds the maximum specified. For installation, apply engine assembly lube or moly-base grease to the camshaft lobes, journals, rocker arms, and lash adjusters. Insert the camshaft into the housing, install a new O-ring and oil seal retainer with anaerobic sealant on the first few threads of the retainer bolts. Clean the mating surfaces of the camshaft housing and cylinder head, apply a bead of sealant, and then install and tighten the housing bolts in sequence to the specified torque.