Timing system is delicate, and if the wrong thing is done, serious damages can be done to the engine and therefore, should be handled by experts only. First, unplug any of the wires with a negative connection and then, take off the air intake duct and the spark plugs. Remove the accelerator and the cruise control linkages from the throttle valve, together with the catalytic converter monitor and the heated oxygen sensor connections. Next, unbolt the wiring harness support and place the wiring harness to the side, and take off the valve cover, and drain the coolant collecting it in a container and placing the coolant pipe to the side. Open the passengers door on the timing belt side and loosen the right front wheel lug nuts unlatch the hood and raise the car remove the front wheel and the fender splash shield. Insert the crankshaft in such a manner that the timing pin is not used to lock the crankshaft and position the engine at TDC for number 1. Of the water pump pulley bolts, crankshaft pulley, as well as the lower timing belt cover need to be removed. S ecure an engine hoist / engine support fixture to the engine, then, remove the upper engine mount and studs from the engine mount bracket. Remove the electrical connector from the knock sensor, take off the upper timing belt housing, also unbolt and extract the accessory Serpentine Belt idler and the engine mount bracket. It will be necessary to use the manufacturer service tool to adjust the camshafts to the TDC position, and, if the timing belt is used again, it is necessary to mark at which direction it was removed. Tighten the tensioner until it locks in place and then remove the timing belt while at the same time preventing the sprockets from rotating. If in doubt the old belt should be inspected for wear or damage and oil or coolant leaks, the belt should be replaced. The belt tensioner and sprockets should also be checked for wear if any, or if it could be replaced with another new one. Before starter the engine turn the crankshaft with your hand, at least two revolutions, and be sure that the engine still in the TDC, on the cylinder Number 1. Fix the TDC position of the camshafts by loosening the camshaft sprocket bolts and using holding tool so that these will not rotate. Reinstall the timing belt and make certain it turns in the reverse of the original direction with all the looseness on the tensioner side. After proper installation of the belt it can be attached to the timing belt inner shield and tightened to the correct torque. If your camshaft has sprocket bolts, you should tight these bolts while holding the sprockets in position, then remove the aligning tool and timing pin. The vehicle's crankshaft should be turned through 720 degrees to allow the timing belt to set, with the timing pin able to be inserted fully. If necessary you can never use the holding tool to realign any of the camshafts that seem to be out of alignment. The procedure of reassembly is similar to the removal process to guarantee that all the fasteners have been tightened to the correct torque. The Powertrain Control Module therefore requires a self- learning of the idle and fuel trim for it to perform efficiently after reconnecting the battery.
