Toyota 13501-31040 CAMSHAFT

The process of its removal is not very basic, that is why it is recommended to read it several times before the procedure. The steps to follow include first pulling off the cable that is connected to the negative terminal of the batter and secondly, siphon out the oil and coolant of the engine. Take off the timing chains and to extract the camshafts from the right cylinder head, they should be turned anti clockwise until; the outer edge of the intake cam lobe for the No. 1 cylinder should align to the 7 o'clock position and the outer edge of the exhaust cam lobe stand at the 12 o'clock position. Slowly cast off all the 16 camshaft bearing cap bolts in the same fashion followed by the removal of the camshafts as well as the bearing caps where the camshafts were situated, but before discarding them they were arranged in order and the caps labeled. With the help of a magnet, pull off the lifters and return all of them to the box, and be sure to properly label each one. With reference to the above procedure, if removing camshafts from the other cylinder head, perform the above mentioned step but the rotation shall be done on the right cylinder only. In addition, when the timing chains and camshafts are out, do not rotate the crankshaft. Look at each lifter for signs of wear, look at the cam lobes and bearing journals to determine if there is any damage and check the height of each camshaft lobe and the diameter of each journal with micrometer if they do not meet manufacture's specifications then they should be replaced. With the engine turned off, on the bench check the oil clearance for each camshaft journal using Plastigage, also clean the bearing caps and journals before laying the camshaft in place for this, do not add any lubrication. Following the above, apply clean engine oil on the lifters and then with the help of gasket and bearing caps, place the camshafts on the right cylinder head as appropriate with the proper orientation and tightening them in a gradual fashion with a sequence keenly observed. Knead with the correct orientation of the cam lobes the same as the right cylinder head and again lubricate and place the left cylinder head too. The rest of the installation is done in the reverse order to the removal including the timing chain and cover. Always after installation the crankshaft should manually and smoothly be turned through at least two revolutions with more utilization of energy which can show that there is a problem. Last, add Some oil and coolant, reconnect the battery and start the engine and check for leaks Lifter clatter may take a min of 5 to subside.

Apply moly-base grease or engine assembly lube to the lifters, then install them in their original locations in the cylinder heads.

Carefully rotate the crankshaft by hand through at least two full revolutions and check for any resistance, which may indicate a problem.

Align the cam timing marks on the drive and driven gears at an upward 10-degree angle.