OEM 2003 Toyota Celica Timing Chain

2003 Toyota Celica Timing Chain Parts Q&A

• Q: How to inspect and replace the timing chain, sprockets, and oil seal on 2003 Toyota Celica?

  A: You should check the timing chain length through full chain extension using vernier calipers to determine if replacement is needed. The measurement of 16 links should not exceed 122.6 mm (4.827 inch). Measuring the timing sprocket requires the chain placed around it while measuring its diameter with vernier calipers that touch chain rollers. New chain and sprocket replacements are necessary if the camshaft measures under 97.3 mm (3.831 inch) or the crankshaft measures under 51.6 mm (2.031 inch). The chain tensioner slipper and vibration damper should be replaced if wear measurement rises above 1.0 mm (0.039 inch). The plunger movement in the chain tensioner should be smooth when raising the ratchet pawl then stay locked after release. Install new oil seals on the timing chain cover by using Special Service Tool 09309-37010 to tap them into place until they reach the edge of the cover while applying MP grease to the lip of the seal. Remove the cover first if necessary. Use Special Service Tool: 09309-37010 to install the new oil seal by tapping it until it reaches the timing chain cover edge when the cover is installed. Before doing this, trim the old seal and pry out the damaged seal using a screwdriver while avoiding damage to the crankshaft.