{"model":"mk4","model_name":"MK4 Supra","vehicle":"Toyota Supra A80 (1993–2002, 2JZ-GE / 2JZ-GTE)","document":"Repair Manual","section":"EM","section_name":"Engine Mechanical","page":56,"pages_in_section":139,"title":"Engine Mechanical","section_header":"Engine — Engine Mechanical","ocr_text":"EG–56\n\nENGINE – ENGINE MECHANICAL\n\nEM0188\n202456\n\n60°\n45°\nWidth\n\n• If the seating is too low on the valve face, use 60° and 45° cutters to correct the seat.\n\nP02126\n\n(d) Hand–lap the valve and valve seat with an abrasive compound.\n(e) After hand–lapping, clean the valve and valve seat.\n\nDeviation\n\nEM0988\n202457\n\n9. INSPECT VALVE SPRINGS\n(a) Using a steel square, measure the deviation of the valve spring.\nMaximum deviation:\n2.0 mm (0.079 in.)\nIf deviation is greater than maximum, replace the valve spring.\n\nEM0801\n\n(b) Using vernier calipers, measure the free length of the valve spring.\nFree length:\nBlue painted mark\n41.74 mm (1.6433 in.)\nYellow painted mark\n41.70 mm (1.6417 in.)\nIf the free length is not as specified, replace the valve spring.\n\nEM0281\n\n(c) Using a spring tester, measure the tension of the valve spring at the specified installed length.\nInstalled tension:\n186–206 N (19.0–21.0 kgf, 42–46 lbf) at 34.5 mm (1.358 in.)\nIf the installed tension is not as specified, replace the valve 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