Totaal:
Toyota officially states the 2SZ timing chain does not require regular replacement. However, based on real-world mechanic experience:
Yes. You can remove the valve cover and timing cover with the engine in the car, but you’ll need to support the engine from above and remove the right-side engine mount. toyota vitz 2sz timing marks
If your chain has colored links (plated links), they serve as a visual confirmation: Toyota officially states the 2SZ timing chain does
The timing marks are located on three main components: toyota vitz 2sz timing marks
View from front of engine (radiator side):
Signs your chain needs attention:
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