How to remove and install a Timing belt and Sprocket in V8 engine on 2003 through 2009 Toyota 4Runner?

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Once the timing belt is in place, compare all the camshaft sprockets and the crankshaft sprockets to the alignment marks before starting the engine so that there wouldn't be and and costs such as damages on the valves and lifters. First, remove the cable from the negative terminal of the battery, then remove the under-hood splash shield and drain the cooling system of the engine. Subsequently, the procedures are the withdrawal of the fan shroud and fan assembly, drivebelt, the power steering pump with the hoses still connected, alternator and air conditioning compressor with refrigerant lines connected. Move to the next step to unlatch the throttle body cover, reach and knock the drivebelt idler pulley, and work on the three hoses connected to the oil cooler pipe and finally undo the oil cooler pipe. Loosen the left and right side number 3 timing belt covers, the number 2 timing belt cover, and the fan bracket. Remove the drivebelt tensioner and then retard the crankshaft to the number one piston of TDC of the cylinder and align the marks on both the camshaft sprockets and a crankshaft sprockets. Perform the removal of the crankshaft pulley with particular attention to locking it so that the engine will not rotate then, get rid of the number one belt cover and the crankshaft sensor timing plate. Verify the crankshaft and camshaft timing marks before removing crankshaft pulley, and if reusing the belt, it should be also marked. Revise the crankshaft pulley and bolt for a short while then rotate the crankshaft as it is approximately 50 degrees in anti-clock wise direction. Take off the timing belt tensioner and make the tension between the right side camshaft sprocket and the crankshaft sprocket to disappear. Now, it is required to take the timing belt off the sprockets and if needed, the camshaft sprockets and idler pulleys must also be removed. If the crankshaft sprocket is badly worn or damaged in any way it should also be removed. Take a look at the timing belt for signs of wear and also look at the water pump. Additionally, one should check the state of the belt tensioner to determine if it has leaking oil and, equally important, check that it is working efficiently. Having cleaned the area of the timing belt, replace the idler pulleys if you have removed them, position the crankshaft timing sprocket and properly align the markings on the timing belt. After that, compress the timing belt tensioner pushrod and then place it with the help of the specified bolts with force tightening. Rotate the crankshaft through two complete revolutions and observe the relative position of the marks, if they're in the correct position, start the engine. After the timing belt and the timing plate have been correctly replaced, the rest stages of the Engine maintenance involve replacement of Crankshaft sensor timing plate, number 1 timing belt cover, crankshaft pulley, drive belt tensioner, fan bracket, A/C compressor, upper timing belt cover, left and right number 3 timing belt covers and so on, before final replacement of all the covered parts. Replace coolant, check the engine oil level, and with the engine running, inspect for leaks and listen for serious mechanical sounds.

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