OEM Toyota Prius Timing Chain

Toyota Prius Timing Chain Parts Questions & Experts Answers

• Timing Chain
  13506-21050
  Q: How to service the timing chain on Toyota Prius?

  A: The first step for servicing the timing chain requires removing all floor boards from the rear as well as removing the deck floor box and rear No. 3 floor board. Then disconnect the negative battery terminal cable for at least 90 seconds to avoid Air Bag and seat belt pretensioner activation. After draining coolant and oil you must remove various components including the radiator support opening cover along with front wheels and the No. 3 and No. 4 center engine under covers. Additionally the wiper arm head caps, front wiper arms, hood to cowl top seal, cowl top ventilator louvers, windshield motor with wiper link assembly, front cowl top panel outer and air cleaner assembly need removal by loosening clamps, disconnecting wiring connectors and removing clamp fixtures. Next disconnect the brake master cylinder reservoir while removing its connector and bolts followed by its suspension with rope at the correct angle to avoid hose air entry. Start by removing the reservoir bracket, windshield washer jar, and purging VSV while using SST 09213-58013 (91111-50845), and SST 09330-00021 as it holds the crankshaft pulley for crankshaft bolt loosening. The procedure requires removal of the engine mounting insulator RH and spacer along with bracket followed by camshaft timing oil control valve assembly and Crankshaft Position Sensor until timing chain cover and oil pump seal are accessible for replacement. Use TDC/compression position on cylinder No. 1 to remove the chain tensioner and tensioner slipper along with the No. 1 chain vibration damper and chain. The No. 1 cylinder should be positioned at 20° ATDC for installation. The installation procedure for this repair includes placing 2 bolts (torque: 9.0 Nm) into the chain vibration damper before alignment of the timing marks with subsequent installation of chain tensioner slipper and tensioner (torque: 9.0 Nm). Final checks on the camshaft timing sprocket tension should be performed before the addition of the oil pump seal, timing chain cover, crankshaft position sensor, camshaft timing oil control valve assembly, engine mounting bracket (torque: 55 Nm), engine mounting spacer (torque: 55 Nm), and engine mounting insulator RH ( Use SST to install the crankshaft pulley (torque at 128 Nm) followed by the Water Pump then the Drive Belt and a check of the drive belt tension. Tighten both the bolts and nuts to 10 Nm while using Toyota Genuine Seal Packing Black or Three Bond 1207B or equivalent seal packing against the cylinder head cover. Place the Ignition Coil and brake master cylinder reservoir cover followed by the wire harness side by side with the windshield washer jar and reservoir bracket and brake master cylinder reservoir (torque: 8.5 Nm). The service plan includes installation of the No. 2 air cleaner inlet, air cleaner assembly bolted with 7.0 Nm torque while clamped with 3.0 Nm torque along with the front cowl top panel outer, windshield Wiper Motor and wiper link assembly, cowl top ventilator louvers (RH and LH), hood to cowl top seal, front wiper arms (LH and RH), wiper arm head cap, engine oil addition and cable connection to negative battery terminal before reinstalling rear floor boards. After reconnecting the negative terminal of the battery it is necessary to initialize the affected systems. The installation sequence starts by adding engine coolant followed by leak detection before placing the radiator support opening cover and both the No. 4 center engine under cover and No. 3 engine under cover and front wheels.