Toyota 13053-50060 Camshaft Sub-Assembly

The removal procedure is more complex and thus, it will be important that you go through it keenly before attempting it at home. First, start by removing the connection of the cable on the negative terminal of the battery, followed by the removal of engine oil, and coolant. Disconnect the timing chains and to withdraw the camshafts from the right cylinder head and rotate the camshafts anti-clockwise until the intake lobe of No.1 cylinder is at 7 O'clock position and exhaust camshaft lobe is at 12 o' clock position; for left cylinder head this process is not required. Slowly and evenly, undo all the camshaft bearing cap bolts in the manner that is opposite to the lightening sequence, then remove all the bearing caps and camshafts and store them in order and label them. Another magnet is applied in lifting and relocating it to the same box alongside the lifters, then they are also labeled. If in the other cylinder head you will be pulling camshafts out, follow all the steps described above paying attention to the clockwise rotation of the right cylinder. During the inspection look for flattened or scratched places on each lifter and they should visually look at the cam lobes and bearing journals to see if there is any damage done and look at the height of the camshaft lobe with the micrometer and check the diameter of each journal and if all the components are worn out replace them. For oil clearance, first free the bearing caps and journals, place the camshaft on its seat but don't need the lifters or any form of greasing, use Plastigage to determine the amount of clearance and if the amount is greater than the specified measurement, it will require replacement of the camshaft or cylinder head. While assembling, first, the lifter bores and lifters should be lubricated using clean engine oil; then, these parts should be returned to their initial positions while rotating them smoothly. For the right side, apply dry sum lubrication on the camshaft journals, position the camshaft in the correct manner, apply oil to the upper bearings before placing the bearing caps and use the torque wrench to tighten the bolts uniformly. Perform the same for the left side noting the position and the proper sequence of tightening the bonnet. To ensure a successful crankshaft installation, reverse the removal steps by following the applicable automaker's shop manual; while manually rotating the crankshaft to determine resistance or any difficulties at any point, correct the errors before proceeding. Last, add oil or coolant if needed, reconnect battery, start engine and examine it for leaks; however, lifter noise may take few minutes to settle down.