Timing Chain: Inspection

2004 Toyota Matrix XR, FWD, StandardSECTION Inspection
WARNING: This page is about a different car, the 2004 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT TIMING CHAIN AND TIMING SPROCKETS 
    1. Using vernier calipers, measure the length of the 16 links with the chain fully stretched.

      Maximum chain elongation: 122.6 mm (4.827 in.) 

      If the elongation is greater than maximum, replace the chain.

      HINT:

      Make the same pulling measurements at 3 or more places selected at random.

      Fig 1: Measuring Length Of Links
      G02925396Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Wrap the chain around the timing sprocket.
    3. Using vernier calipers, measure the timing sprocket diameter with the chain.
      Fig 2: Measuring Timing Sprocket Diameter With Chain
      G02925397Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.