OEM Scion tC Timing Chain

Scion tC Timing Chain Parts and Q&A

• Timing Chain
  13507-28010
  Q: How to install the No. 2 Timing Chain sub-assembly on Scion tC?

  A:

  Set the crankshaft key in its left horizontal position before aligning the yellow mark links with the timing marks of each gear while turning the cutout of the drive shaft to the top. Position the gears from crankshaft and oil pump shaft together with the chain encircling them and use the nut to set/install the oil pump drive shaft gear before you will tighten it briefly. Add the damper spring to the adjusting hole followed by the chain tensioner plate installation along with a bolt and torque the bolt to 12 Nm (122 kgf-cm, 9 ft-lbf). Set the adjusting hole of the oil pump drive shaft gear to match the oil pump groove before inserting a 4 mm diameter bar to stabilize the gear. Afterward, tighten the nut to 29.5 Nm (301 kgf-cm, 22 ft-lbf). When the crankshaft reaches a 90 degrees clockwise position the key on the crankshaft will move upward. Start by putting the crankshaft timing sprocket together with the No. 1 chain vibration damper and securing them with two bolts that should be tightened to 9.0 Nm (92 kgf-cm, 80 in-lbf). The operator must first align the compression marks on the No. 1 cylinder by rotating the camshafts with wrenches and next apply the timing chain to the crankshaft timing sprocket while maintaining the gold or orange mark link at the timing mark position on the crankshaft timing gear. The service tool 09309-37010 along with a hammer helps to tap in the crankshaft sprocket. The sprocket installation requires precise alignment of the gold/yellow links with each camshaft gear timing mark. The chain tensioner slipper gets bolted with 19 Nm (194 kgf-cm, 14 ft-lbf) torque while the timing chain guide utilizes a 9.0 Nm (92 kgf-cm, 80 in-lbf) torque. Apply seal packing (Diameter 2.0 mm (0.079 in.)) on the timing chain cover sub-assembly before installing it with care to do so within 3 minutes and avoid adding engine oil for at least 2 hours after installation. Install the cover by tightening 14 bolts and 2 nuts at specific torque values to 9.0 Nm (92 kgf-cm, 80 in-lbf for bolt A), 25 Nm (255 kgf-cm, 18 ft-lbf for bolt B), and 55 Nm (561 kgf-cm, 41 ft-lbf for bolt C), while tightening the nut to 11 Nm (112 kgf-cm, 8 ft-lbf). Insert the stud bolt for the V-ribbed belt tensioner with an E10 "TORX" socket then torques it to 21.5 Nm (219 kgf-cm, 16 ft-lbf). Before installing the chain tensioner elements, users must release the ratchet pawl, push in the plunger, and hook it to the pin before adding a new gasket followed by tightening the two nuts to 9.0 Nm (92 kgf-cm, 80 in-lbf). Fix the pulley using Special Service Tool: 09213-54015 91651-60855 to maintain stability during bolt tightening before torque is applied to 180 Nm (1,835 kgf-cm, 133 ft-lbf). Turn the crankshaft counterclockwise first to free the plunger knock pin from the hook then turn it clockwise to verify the plunger extension. Attach the wire harness protector clamp and tighten its bolt to 8.4 Nm with torque value set at 85 kgf-cm and 74 in-lbf. Installation of the oil pan sub-assembly requires users to remove outdated packing materials followed by the application of a continuous bead of seal packing (Diameter 3.0 to 4.0 mm (0.118 to 0.157 in.)) before mounting the oil pan to the cylinder block using uniform 12 bolt and 2 nut torque of 9.0 Nm (92 kgf-cm, 80 in-lbf). A transmission jack inserted beneath the engine should rest on a wooden block before the chain block and sling device are stripped away along with the No. 1 and No. 2 engine hangers. It is necessary to install two components in the following order: crankshaft position sensor followed by V-ribbed belt tensioner assembly installed with a bolt plus nut torqued to 59.5 Nm (607 kgf-cm, 44 ft-lbf). The cylinder head cover sub-assembly needs installation through removal of old packing material for seal packing application at specified locations. Clamp the cover using eight bolts and two nuts which require installing torque measures of 11 Nm (112 kgf-cm, 8 ft-lbf for bolt A), 14 Nm (143 kgf-cm, 10 ft-lbf for bolt B), and 11 Nm (112 kgf-cm, 8 ft-lbf for nut). Screw a bolt marked A to 8.4 Nm (86 kgf-cm, 74 in-lbf) and secure B clamps along with the installation of 2 ventilation hoses to the cylinder head cover. The engine mounting insulator on the right-hand side requires installation with 4 bolts then 2 nuts tightened to 52 Nm (530 kgf-cm, 38 ft-lbf). Simultaneously install the front engine mounting insulator using a bolt and a nut which needs torquing to 52 Nm (530 kgf-cm, 38 ft-lbf). Then connect the 2 clamps of the engine wire. The wire harness protector gets installed with a bolt followed by the No. 1 oil reservoir bracket that receives 2 bolts with 7.8 Nm (80 kgf-cm, 69 in-lbf) torque while the vane pump oil reservoir mounts to the bracket and the radiator reservoir gets bolted with 5.0 Nm (51 kgf-cm, 44 in-lbf) torque. The installation of the No. 1 engine cover sub-assembly requires 2 nuts to be tightened to 7.0 Nm torque (71 kgf-cm, 62 in-lbf) before continuing with the front fender apron seal RH followed by engine under cover LH and engine under cover RH on front wheel RH and hood sub-assembly repair. System initialization must be performed after negative (-) battery terminal cable removal and reconnection.
• Timing Chain
  13506-0H011
  Q: How to remove the timing chain on Scion tC?

  A:

  Disconnection of the negative cable from the battery and waiting ninety seconds is essential when removing a 2AZ-FE timing chain to avoid Air Bag activation. Begin by removing the hood sub-assembly with the front wheel RH as well as engine under covers RH and LH along with the front fender apron seal RH and No. 1 engine cover sub-assembly through the removal of their corresponding 2 nuts. The first step requires draining engine coolant followed by removal of the front Exhaust Pipe assembly with fan & generator V belt and generator assembly and vane pump assembly. The engine mounting insulator RH requires removal by unbolted radiator reservoir and the vane pump oil reservoir needs separation from the No. 1 oil reservoir bracket without breaking connected 2 oil reservoir hoses followed by removal of all necessary bolts and nuts. The engine wire clamps should be disconnected while lowering the engine with a transmission jack. The procedure requires the Ignition Coil assembly and cylinder head cover sub-assembly removal after disconnecting ventilation hoses and engine wire and V-ribbed belt tensioner assembly removal during engine elevation. Install the engine hangers at positions 1 and 2 before securing the engine with a chain block during a bolt and nut removal operation of the Crankshaft Position Sensor combined with the oil pan sub-assembly. The work technician performs precise cutting of the applied sealer when removing the oil pan. To set the No. 1 cylinder at TDC/compression you must align the crankshaft pulley groove with "0" mark and both camshaft timing gears need proper alignment. Begin by fixing the crankshaft pulley using Special Service Tools: 09213-54015 91651-60855 to loosen the bolt before removing it with the Special Tools: 09950-50013 09951-05010. It is necessary to remove the No. 1 chain tensioner assembly together with the timing chain cover sub-assembly while safeguarding contact surfaces. Then extract the No. 1 crankshaft position sensor plate and timing chain guide along with the chain tensioner slipper. Finally, obtain the chain sub-assembly, No. 1 chain vibration damper, crankshaft timing sprocket, and No. 2 chain sub-assembly after aligning the oil pump drive shaft gear by turning the crankshaft and securing it in position followed by component removal.