What are the steps and precautions for removing and installing a timing belt and Sprocket on 1999 through 2005 four cylinder Hyundai Sonata?

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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.

Genuine Hyundai Sonata Timing Belt

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Hyundai Sonata Valve Timing Belt

Hyundai Sonata Valve Timing Belt

Hyundai Sonata Valve Timing Belt

Hyundai Sonata Valve Timing Belt

Hyundai Sonata Valve Timing Belt

Hyundai Sonata Balance Timing Belt

Hyundai Sonata Balance Timing Belt

Hyundai Sonata Valve Timing Belt

Hyundai Sonata Valve Timing Belt

Hyundai Sonata Valve Timing Belt

Hyundai Sonata Valve Timing Belt

Hyundai Sonata Valve Timing Belt

Hyundai Sonata Valve Timing Belt

Hyundai Sonata Valve Timing Belt

Hyundai Sonata Valve Timing Belt

Hyundai Sonata Balance Timing Belt

Hyundai Sonata Balance Timing Belt

Hyundai Sonata Balance Timing Belt

Hyundai Sonata Balance Timing Belt

Hyundai Sonata Balance Timing Belt

Hyundai Sonata Timing Belt

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