Wednesday, October 23, 2013

How to Replace a 2003 Hyundai Sonata Timing Belt

The 2003 Hyundai Sonata is available with a four-cylinder 2.0-liter engine with a double overhead cam. This engine design requires a timing belt to synchronize the crankshaft with the camshaft. The Sonatas timing belt should be replaced approximately every 60,000 miles.

Instructions

    1

    Remove components as required to access the cover of the timing belt on the front of the engine. Disconnect the cover with a socket wrench. Turn the crankshaft clockwise to align the timing mark on the crankshaft sprocket with the timing mark on the cylinder head. This places the No. 1 piston in the top dead center position needed to replace the timing belt.

    2

    Disconnect the tensioner and the idler pulley for the timing belt with a socket wrench. Detach the timing belt from the crankshaft and camshaft.

    3

    Turn the crankshaft clockwise again to align the timing marks if necessary. Connect the tensioner for the timing belt and the idler pulley. Tighten the mounting bolt for the idler pulley to between 32 and 41 ft-lbs. with a torque wrench.

    4

    Place the timing belt over the camshaft sprocket and crankshaft sprocket in that order. Turn the timing belt tensioner to place tension on the timing belt. The timing belt is at the proper tension when five pounds of force in the middle of the longest span of the timing belt produces a deflection of 0.16 to 0.24 in.

    5

    Tighten the bolt for the tensioner pulley to between 32 and 41 ft-lbs. with a torque wrench. Turn the crankshaft sprocket clockwise by one complete turn to realign the timing marks.

    6

    Adjust the belt tension again if necessary. Replace the cover of the timing belt cover and any components you removed to access the timing belt.


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