The Lexus GS is a mid-measurement luxurious sedan that has been in manufacturing since 1993. The 2002 type is a second technology Lexus, which incorporates the 1997 by 2005 type. The 2002 Lexus GS 300 has a six-cylinder three.zero-liter engine with a double overhead camshaft. This sort of engine makes use of a timing belt to synchronize the rotations of the crankshaft and camshaft. The timing belt ought to final at the least 60,000 miles earlier than requiring substitute.
2002 Lexus GS 300 Replace the Timing Belt Instructions
Remove any elements wanted to entry the higher timing belt cowl. Disconnect the eight mounting bolts on the higher timing belt cowl with a socket wrench and take away the higher cowl. Flip the crankshaft clockwise with a hex wrench to align the timing mark on the crankshaft pulley with the timing mark on the crankcase. The timing marks on the camshaft pulleys should additionally align with the timing marks on the lower timing cowl.
Disconnect the timing belt tensioner and its mud cowl with a socket wrench. Remove the lower timing belt covers and the information for the timing belt. Rotate the pulley for the proper camshaft clockwise barely to alleviate the rigidity on the timing belt, and detach the timing belt from its pulleys.
Replace the lower timing cowl and fasten its mounting bolts with a socket wrench. Flip the proper camshaft pulley clockwise to align its timing mark with the corresponding timing mark on the lower timing belt cowl. Flip the left camshaft pulley clockwise to align its timing mark. Place the new timing belt onto the crankshaft pulley. Align its set up mark with the fringe of the lower timing belt cowl.
Place the timing belt on the left camshaft pulley and align the left camshaft timing mark on the timing belt with the timing mark on the left camshaft. Align the timing mark on the left camshaft with its corresponding mark on the lower timing belt cowl. Repeat this step with the proper camshaft. Place a plate washer between the engine block and the timing belt tensioner. Press the push rod for the tensioner into its housing to align the gap in the push rod with the gap in the housing. Insert a zero.05 inch Allen wrench into the holes to carry the push rod in place.
Replace the mud cowl for the tensioner, and set up the tensioner. Tighten the mounting bolts for the tensioner to twenty ft- lbs. with a torque wrench. Remove the Allen wrench from the gap in the push rod housing to use the right pressure to the timing belt. Flip the crankshaft clockwise two full turns and align the timing marks as soon as once more. Replace the higher timing belt cowl with a socket wrench. Install any parts eliminated in the first step to entry the timing belt.
[taken from ehow.com]
