OEM 2008 Scion tC Timing Chain

2008 Scion tC Parts Questions & Experts Answers

• Q: How to remove the timing chain on 2008 Scion tC?

  A: The first step to remove the 2AZ-FE timing chain requires disconnected power from the negative battery cable followed by a 90-second waiting period for Air Bag deactivation. The necessary steps start with removing the hood sub-assembly and front right wheel followed by engine under covers on both sides and the front fender apron seal from the right side and the No. 1 engine cover sub-assembly requires 2 nuts to be taken off. The first step involves draining the engine coolant followed by front exhaust pipe assembly removal and subsequent removal of fan and generator V belt alongside the generator assembly and vane pump assembly. The right side engine mounting insulator requires removal through unfastening the bolt from the radiator reservoir before splitting the vane pump oil reservoir from the No. 1 oil reservoir bracket while hoses stay connected. Additional needed bolts and nuts separate them. A transmission jack with a wooden block should sustain the engine because it helps users remove front engine mounting insulators and all 4 bolts and 2 nuts from the right engine mounting insulator without applying excessive pressure on the return tube. The removal process requires the detachment of ventilation hoses, engine wire clamps, and V-ribbed belt tensioner assembly from the ignition coil assembly and cylinder head cover sub-assembly which needs slight engine elevation. The oil pan sub-assembly with crankshaft position sensor can be removed after installing No. 1 and No. 2 engine hangers and using a chain block to support the engine while removing 12 bolts and 2 nuts. Professional special service tool 09032-00100 enables operators to cut the applied sealer while safely detaching the oil pan. Start by positioning the No. 1 cylinder at TDC/compression by matching the timing mark "0" on the crankshaft pulley with the grooves while maintaining proper alignment of the camshaft timing gears. Use the sequence of Special Service Tools including 09213-54015, 91651-60855, 09950-50013, 09330-00021, 09951-05010, 09952-05010, 09953-05020 and 09954-05021 to remove the crankshaft pulley. The mechanic must carefully detach the No. 1 chain tensioner assembly before removing the timing chain cover sub-assembly with both an E10 "TORX" socket and screwdriver. Adjust the crankshaft position where the oil pump drive shaft gear meets the target mark before using a 4 mm diameter bar to lock its position and taking out all the required parts including the No. 1 crankshaft position sensor plate, timing chain guide, chain tensioner slipper, chain sub-assembly, No. 1 chain vibration damper and crankshaft timing sprocket beside the No. 2 chain sub-assembly.