OEM 2003 Toyota Echo Timing Chain

2003 Toyota Echo Parts Questions & Experts Answers

• Q: How to service and repair the timing chain on 2003 Toyota Echo?

  A: You must start timing chain service by removing several components including engine coolant drain and the RH front wheel along with the RH engine under cover and drive belt and generator. The service on the PS pump requires disconnection from the engine followed by removing the RH engine mounting insulator through a jack placement process with a wooden block. If the vehicle has A/C the bolt for the liquid tube next to the 5 bolts and insulator and nut must be removed first. Start by removing the cylinder head cover after you detach its 4 nuts, ignition coils, 2 PCV hoses and 7 bolts, 2 seal washers and gasket. Set the No.1 cylinder to TDC/compression alignment by rotating the crankshaft pulley to match the timing mark "0" while both camshaft timing sprocket and valve timing controller assembly have correct reference points. You can remove the crankshaft pulley through the use of Special Service Tools: 09213-70010, 09330-00021 followed by optional tool 09950-50013 (09951-05010, 09952-05010, 09953-05020, 09954-05021, if needed. To access the components within the timing chain cover area requiring removal start by removing 13 bolts and a nut while using a torx wrench socket (E8) for the stud bolt and carefully prying off the cover to prevent damage. Disassemble the cylinder block and oil pan No. 1 by removing their two O-rings and extract the chain tensioner and its components including the chain tensioner slipper and chain vibration damper. To properly inspect the timing assembly components you should measure the chain elongation compared to 123.2 mm (4.850 inch) and confirm that both sprocket sizes exceed 96.2 mm (3.787 inch) for the camshaft while the crankshaft sprocket must reach at least 50.5 mm (1.988 inch). Determine the wear on the chain tensioner slipper as well as the vibration damper while confirming that these parts measure no more than 1.0 mm (0.039 inch). Also test for smooth plunger function in the chain tensioner. Special Service Tool 09612-22011 must be used to tap in a new crankshaft front oil seal until it reaches the timing chain cover edge during its installation. Installation of the timing components requires the crankshaft positioning at ATDC 40 - 140 degrees followed by timing sprocket alignment at ATDC 20 degrees. Then instal Start by installing the chain vibration damper with a torque of 9.0 Nm (92 kgf-cm, 80 inch lbs.), afterwards placing the chain tensioner slipper, and finally completing with the chain tensioner while ensuring both proper tension and torque at 9.0 Nm (92 kgf-cm, 80 inch lbs.). Use Part No. 08826-00100 or equivalent seal packing to cover the timing chain housing and combine it with the new water pump and O-rings and tighten every bolt to its specified torque value. The RH mounting bracket needs to be installed with seal packing (Part No. 08826-00080 or equivalent) then torque at 55 Nm (561 kgf-cm, 41 ft. lbs.). Next, install the crankshaft position sensor followed by the oil control valve then crankshaft pulley using correct torque values. To complete the installation process the technician should fit the cylinder head cover along with the RH engine mounting insulator and the PS pump and generator and drive belt and RH engine under cover and RH front wheel. After engine refilling with coolant the technician can start the engine for leak inspection.