That’s when she found the PDF. Buried on a dusty Japanese forum, linked from a thread that hadn’t been active since 2012, was a scanned manual: “2SZ-FE Engine Mechanical – Exclusive Supplement.”
Requires setting the engine to Top Dead Center (TDC) on cylinder 1 and meticulously aligning the timing marks. 2. Valve Clearance Adjustments yaris 2sz fe engine manual exclusive