OEM 2002 Toyota Sienna Timing Belt

2002 Toyota Sienna Parts Questions & Experts Answers

• Q: How to remove and install the timing belt on 2002 Toyota Sienna?

  A: One must begin by removing the outer front cowl top panel assembly followed by the right-hand front wheel and fender apron seal. The first step involves removing the generator drive belt and power steering pump drive belt through loosening the two respective bolts. Users should commence the timing belt replacement by detaching the engine coolant reservoir hose from the water outlet then disconnecting the ground strap connectors followed by DLC1 at the No. 2 right-hand engine mounting bracket. Proceed by removing the right-hand engine mounting stay together with engine moving control rod and No. 2 right-hand engine mounting bracket before taking out the No. 2 generator bracket through generator pivot bolt loosening and nut removal. To detach the crankshaft pulley first install Special Service Tools 09213-54015 (91651-60855) along with 09330-00021 to extract the pulley bolt followed by the usage of Special Service Tools 09950-50013 (09951-05010 09952-05010 09953-05010 09953-05020 09954-05021 to remove the pulley section. Start by unfastening the four bolts holding the No. 1 timing belt cover and working towards the timing belt guide until all components on the No. 2 timing belt cover are disassembled via engine wire protector clamp removal and the five bolts. Begin the right-hand engine mounting bracket removal process by removing two bolts along with a single nut. Set the No. 1 cylinder at TDC/compression position by installing the crankshaft pulley bolt temporarily and rotating the crankshaft until the timing marks align and inspect the camshaft timing pulleys against the No. 3 timing belt cover. The reuse of timing belts requires checking for existing marks while new marks must be applied before any removal process. The timing belt tensioner attaches with two bolts which should be released one at a time before removing the belt. Special Service Tools 09249-63010 and 09960-10010 (09962-01000 and 09963-01000) must be used to remove the right-hand timing pulley while Special Service Tools 09960-10010 (09962-01000/09963-01000) are utilized for left-hand timing pulley removal. Reroute the 10 mm hexagon wrench to detach the belt-driven No. 2 idler pulley followed by the No. 1 idler pulley. The crankshaft timing pulley requires removal through the elimination of its bolt and timing belt plate followed by tool usage of Special Service Tool: 09950-50013 (09951-05010, 09952-05010, 09953-05010, 09953-05020, 09954-05011) to carry out the operation while protecting the sensor component from scratches. Check the belt for any damage as well as verify that it remains straight while avoiding all contact with oil, water and steam. The subsequent evaluation needs to confirm oil-free idler pulleys and timing belt tensioner along with proper operation. The procedure begins with the crankshaft timing pulley which requires alignment of the pulley set key before installing the timing belt plate with a torque specified at 8.0 Nm (80 kgf-cm, 69 inch lbs.). Use the adhesive Part No. 08833-00080 to fix the No. 1 idler pulley before torquing it to 34 Nm (350 kgf-cm) or 25 ft. lbs. Next, the No. 2 idler pulley requires a torque setting of 43 Nm (440 kgf-cm) or 32 ft. lbs. The right-hand camshaft timing pulley should be installed so the flange faces outward before achieving 88 Nm (900 kgf-cm, 65 ft. lbs.) torque followed by installing the left-hand camshaft timing pulley with 125 Nm (1,300 kgf-cm, 94 ft. lbs.) torque. Check that all timing marks align when the No. 1 cylinder reaches TDC/compression for a second time. Position the timing belt after allowing the engine to cool down then activate the timing belt tensioner through the push rod followed by fastening it with a 1.27 mm hexagon wrench. To complete the installation of the timing belt tensioner, torque it to 27 Nm (280 kgf-cm, 20 ft. lbs.) while checking the valve timing by rotating the crankshaft two revolutions to ensure all timing marks remain aligned. Begin by installing the right-hand mounting bracket to a torque setting of 28 Nm (290 kgf-cm, 21 ft. lbs.) before applying the No. 2 timing belt cover that contains an intact gasket. Finish by tightening to a torque of 8.5 Nm (85 kgf-cm, 74 inch lbs.). Attach the timing belt guide followed by the No. 1 timing belt cover and the crankshaft pulley while tightening it to 215 Nm (2,200 kgf-cm, 159 ft. lbs.). After reattaching DLC1 and ground strap connectors complete the installation by putting back the right-hand front wheel and fender apron seal and outer front cowl top panel and test the vehicle's operation for proper noise levels, shock, slippage and shift points and smooth operation.