Hyundai 24312-37500 Valve Timing Belt

Remove the connection from the negative terminal of the battery and situate the number one piston on the top dead center on the compression stroke with the marks on the camshafts and valve covers pasted on the camshaft sprockets up. Take out the drivebelts and the alternator, then unbolt and take off the valve cover and water pump pulley. Remove the timing belt cover; if the timing belt is to be reused, make sure to label the timing belt so as not to arrange the mark s improperly. Ensure that the engine does not move from TDC specifically for cylinder number one, because rotation of the crankshaft might lead to contact between the piston and the valve. Take out the timing belt tensioner and the timing belt; identify its pulley flange in order to reassemble it accurately. If necessary, camshaft sprockets can be eliminated with the help of respective bolts while the camshaft is being held. To lock the left balance shaft, use a screwdriver to place it into the block and to take off the nut of oil pump sprocket and the right balance shaft sprocket bolt. Do not overlook to take out the tensioner and the inner timing belt; this part also requires the marking of the pulley flange. Inspect each part for signs of wear or damage, replace the timing belt and inner belt if necessary and inspect the pulleys, sprockets and tensioner. Depending on the model and whether the inner crankshaft pulley was removed, reinstall it on the engine you just identified while making sure that it's properly oriented; on the end of the right balance shaft, apply oil, place the shiny end towards the engine; using the torque specs found in the Parts Catalog, tighten all bolts and fasteners with a torque wrench. Line up one of the orientation marks on the right balance shaft sprocket with one of the corresponding marks on the crankshaft sprocket with the engine mark. Specifically, place the inner tensioner with proper emphasis on the pulley and check the marks timely. In turning the tensioner to fit back, ensure all the timing marks are lined appropriately, with no shaft rotation when tightening the tensioner. Push forward on the small projection on the upper right side of the belt to ensure the belt moves correctly, then re-attach the outer crankshaft sprocket and the flanges' bolt. Make sure that the screwdriver is still there to fasten the balance shaft, next is the oil pump sprocket together with the nut should be tightened. Refit the camshaft sprockets and torque the sprocket attaching bolts. Tighten the tensioner gradually, securing it in the collapsed state with wire before it is used. Loosen the tensioner pulley bolt and align the camshaft pulley marks with for the valve cover marks, dowels upward. Route the timing belt on the pulleys in sequence and ensure that all the timing marks are lined correctly. Ensure that the distance at which the screwdriver has been inserted in the left side of the engine is appropriate in regard to the position of the oil pump/balance shaft before you pull out the screwdriver and replace the plug. Take out the wire from the tensioner, turn the engine two times with your hand, then let go, feel the resistance and ensure that the plunger of the tensioner protrudes. Thus, the procedure of assembly should be carried out in the reverse order of the disassembly process.

The timing system is precise or rather elaborate and if a mistake is made, serious damage is inflicted on the engine. This procedure should only be done if completely familiar with this kind of repair, otherwise advise on professional help. Verify all operations and make sure that all is in order before starting the engine. Start with disconnecting the cable from the negative terminal of the battery and orienting the number one piston at the TDC on the compression stroke, and on the dowel of the camshaft sprockets elevated, the marks on the camshaft and the upper cover should be aligned. The drivebelts and alternator have to be detached, together with the valve cover, crankshaft pulley and the water pump pulley. Remove the timing belt cover, this timing belt if it is to be re-used should be marked so as to ensure correct re installation. Make sure the engine is still at TDC because turning the crankshaft with the timing belt off will result in piston-valve interference. Take out the timing belt tensioner and the timing belt and indicate the correct position of the pulley flange. If required, take out the camshaft sprockets while making sure that the camshaft sprocket, for each bank, is inversed in relation to the cylinder head noted. Unlock the balance shaft by making a hole and inserting a screwdriver after unscrewing the plug; you should next remove the oil pump sprocket nut and then lift the sprocket. Once the plug from the right side of the block is removed, then you can loosen the right balance shaft sprocket bolt in the same manner. Depower the tensioner and inner timing belt and identify the pulley flange in order to install it later. The wear and damage of all parts should be checked, including the timing belt and inner belt which should be replaced if there is any problem; all pulleys, sprockets, as well as the tensioner should be examined. First, when installing the crankshaft pulley its position has to be properly set, further put on the right bottom pulley spacer on the balance shaft applying oil and tightening the bolt. Ensure that the TO, IO, and Exhaust timing slots on the front of the engine are in line with the marks on the right balance shaft sprocket and crankshaft sprocket. After that, screw the inner tensioner on and adjust the pulley where the timing marks are placed. If possible, shrink the timing belt by pointing the tension side carefully and avoiding to over tighten the belt. Verify that all the timing marks are properly aligned, press on the upper right region of the belt to check it to move and fit the outer crank sprocket and flange with the bolt tightened accordingly. Make sure the screwdriver stays in place to secure the balance shaft, the oil pump sprocket should also be fixed and secured by a nut. Refit camshaft sprockets, then tighten the bolts. Slowly compress the tensioner, and secure it in the compressed state using a piece of wire before fitting it. Position the camshaft pulley sprocket to the TDC and align the marks on it to the marks on the valve cover while making sure that the dowels are up, place the timing belt over the pulley in the directed order. Ensure that all the sprocket timing marks are well in place and ensure that the thickness of the screwdriver that is inserted is well fitted to determine the position of the oil pump/balance shaft before finally replacing the plug. Pull the wire out of the tensioner, manually turn the engine clockwise, and counter clockwise about two times, then let it rest a little if the resistance is felt the mechanic should fix some problems. Last but not the least the sprockets must be in place as shown in the figure last and after that reverse the procedure.

Align the marks on the front (left) camshafts with the marks on the engine. The right camshafts may need to be rotated counterclockwise about 50 degrees before final positioning.

Later models use timing chains that are not regularly serviced.

Using a socket and breaker bar on the crankshaft pulley bolt, turn the crankshaft slowly (clockwise) through two complete revolutions (720-degrees) by hand. If you feel any resistance, stop immediately.