OEM 2007 Scion tC Timing Chain

2007 Scion tC Timing Chain Parts Q&A

• Q: How to Service and Repair the Timing Chain on 2007 Scion tC?

  A: First, position the No. 2 chain sub-assembly with crankshaft key set to left horizontal and drive shaft cutout facing the top as you line up the yellow mark links on the timing marks of each gear. Place the crankshaft and oil pump shaft gears while winding the chain between them before tightening the oil pump drive shaft gear with its nut. Screw in the damper spring to the adjusting hole before installing the chain tensioner plate by torquing its bolt to 12 N m (122 kgf cm, 9 ft. lbf). The adjusting hole of the oil pump drive shaft gear needs to align with the groove of the oil pump before installing a 4 mm diameter bar to lock the position and tightening the nut to 29.5 N m torque (301 kgf cm, 22 ft. lbf). Turn the crankshaft clockwise by 90 degrees to position the crankshaft key for upward installation followed by use of bolts to fasten the crankshaft timing sprocket and the No. 1 chain vibration damper with 9.0 N m (92 kgf cm, 80 in. lbf) torque. First place the No. 1 cylinder at its TDC/compression position then line up the camshaft timing gear marks before adding the chain to the crankshaft timing sprocket where the gold or orange mark link should match the timing marks. Install Special Service Tool: 09309-37010 to place the crankshaft timing sprocket and then align timing marks between the gold or yellow chain links and the camshaft timing gear and sprocket. Secure the chain tensioner slipper using a bolt with 19 N m (194 kgf cm, 14 ft. lbf) torque and the timing chain guide using 9.0 N m (92 kgf cm, 80 in. lbf). Before placing the timing chain cover sub-assembly, apply seal packing (Diameter 2.0 mm (0.079 in.)) and ensure the contact surfaces stay oil-free before securing it with 14 bolts and 2 nuts at specified torque values. Secure the No. 1 chain tensioner assembly into place by setting the plunger correctly then torque the nuts to 9.0 N m (92 kgf cm, 80 in. lbf). Apply Special Service Tool: 09213-54015 (91651-60855) and 09330-00021 to fix the crankshaft pulley before torquing the bolt to 180 N m (1,835 kgf cm, 133 ft. lbf). The oil pan sub-assembly must receive a continuous waterproof seal packing layer not exceeding 3.0 to 4.0 mm (0.118 to 0.157 in.) in diameter. The installation should take place within 3 minutes before engine oil is added at least 2 hours following the installation procedure. Firmly tighten each of the 12 bolts and 2 nuts while following a specific sequence and achieving a torque of 9.0 N m (92 kgf cm, 80 in. lbf). Mount the crankshaft position sensor, V-ribbed belt tensioner assembly together with the cylinder head cover sub-assembly following the specified torque values. Follow the correct torque specifications to install the ignition coil assembly together with the engine mounting insulator RH and front engine mounting insulator. The engine wire must be connected before the installation of the No. 1 oil reservoir bracket and return tube which must be followed by the radiator reservoir then the vane pump assembly followed by generator assembly and fan and generator V belt and front exhaust pipe assembly. The service procedure ends with adding engine oil followed by cable connection to the negative battery terminal and leak inspections before installing the No. 1 engine cover sub-assembly and accompanying front fender apron seal RH and engine under covers and front wheel RH and hood sub-assembly. System initialization takes place afterward when reattaching the battery.