Toyota 13501-16010 CAMSHAFT

Using a micrometer, measure the camshaft lobe height of each lobe on each camshaft; if any lobe height is less than the specified allowable minimum, replace that camshaft. Measure the diameter of the center journal; if it is less than the specified standard diameter, replace the cam. Inspect the bearings for flaking or scoring, and if any of the bearings are damaged, replace the cylinder head and the camshaft supported by the damaged bearing. Measure each camshaft oil journal oil clearance by cleaning the bearing caps and camshaft journals, then laying a strip of Plastigage across each journal. After cleaning, install the bearing caps with the arrows pointing toward the front and tighten each bolt to the specified torque before removing the caps. Measure the flattened Plastigage; if the measured clearance between any journal and bearing cap exceeds the specified maximum, replace the camshaft. If the clearance is greater than the specified maximum, replace the head. Caution: Do not turn the camshaft while the Plastigage is in place.

Install the camshaft bearing caps and gradually tighten the cap bolts to the specified torque in the opposite sequence to that shown in the illustration.