It can be a difficult and time-consuming thing for you […]
It can be a difficult and time-consuming thing for you to replace a timing belt. Depending on the application, the process often involves removing motor mounts, valve covers and parts such as the alternator and power steering pump. Additionally, care must be taken to ensure that the replacement belt is installed in such a way that the camshaft and crankshaft remain properly synchronized. Failure to do so can result in anything from a poorly running engine to catastrophic engine damage.
The timing belt itself is an important part of any engine that makes use of one. With the help of a timing belt, the camshaft and crankshaft can synchronize well so that the valve train operates in time with the pistons. The exact replacement process will differ greatly depending on the make and model of the vehicle but, generally, everything attached to the front of the engine has to be removed or moved out of the way. This generally involves removing the drive belts, accessories and associated brackets, motor mounts and the crankshaft pulley. Once all of these components are removed, it becomes possible to access the timing cover.
The belt tensioner is a crucial part of any engine. It can tighten the engine belt and transfer power through pulleys from the timing belt to the alternator. It is responsible for generating the correct amounts of tension to allow the engine to run and drive its components. Belt tensioners lose their strength and efficiency over time, which can lead to an engine failure if the belts aren't replaced. You need to know whether the tensioner is worn or not.
The car battery light will light up when the belt tensioner is failing. The battery will begin to run down due to the fact that the belt is slowing down and slipping out of its compartment. In addition, the alternator will no longer turn fast enough to power the battery.
One of the main signs that a belt tensioner needs replacement is the looseness of the belt. Listen for a fluttering" noise while driving or while the car is idling. This indicates the tensioner is too loose. Other noises such as squealing or whirling from the front of the engine mean the spring inside the tensioner is weakening. In this case, the belt tensioner needs to be replaced.
Lift the hood. Lift the front of the car with the floor jack and support the car with the jack stands. Remove the passenger-side tire and wheel assembly, using the lug wrench. Remove the inner splash shield, using a 10 mm socket. Loosen the timing belt tensioner with a wrench by pushing it away from the belt while you remove the belt.
Remove the coolant reservoir tank with a 10 mm socket, leaving the hoses attached and move it out of the way of the top engine mount. Remove the bolts securing the power steering pump, using a socket, leaving the hoses attached, and move it aside.
Place the floor jack under the engine oil pan and raise the jack just until it contacts the oil pan. Remove the upper passenger-side motor mount and bracket, using a socket. Raise the engine slightly with the floor jack.
You should use a 10 mm socket to move the timing belt cover away. Turn the crankshaft clockwise with a socket and ratchet until the timing mark on the crankshaft pulley aligns with the mark on the 0 mark on the block at the 12 o'clock position. Check that the timing mark pointer on the camshaft sprocket is aligned with the mark on the cylinder head at 12 o'clock. If the mark on the camshaft sprocket does not line up, rotate the crankshaft one more time and they will align.
Remove the crankshaft bolt,using a socket and breaker bar. Remove the pulley. Loosen the timing belt tensioner bolt, using a wrench and inserting a 1/8-inch Allen wrench into the tensioner. Turn it counterclockwise a quarter-turn. Insert the 1/8-inch drill bit in the hole in the block next to the tensioner to keep it in place. Remove the timing belt.
Install the new timing belt starting on the right side, away from the tensioner. You should make sure that the timing belt is as tight as possible on the right side, so the slack in the belt will be on the tensioner side. Remove the drill bit from the belt tensioner and allow it to apply tension to the timing belt. Tighten the tensioner bolt with a wrench. Insure that both timing marks are perfect, because this is an interference engine.
Turn the crankshaft by temporarily installing the crankshaft bolt and using a socket and ratchet. Turn it clockwise two turns and re-check the timing marks. Install the timing cover, crank pulley and remaining parts in reverse order of removal.