{"model":"mk3","model_name":"MK3 Supra","vehicle":"Toyota Supra A70 (1986.5–1992, 7M-GE / 7M-GTE)","document":"Repair Manual","section":"EM","section_name":"Engine Mechanical","page":47,"pages_in_section":98,"title":"Engine Mechanical","section_header":"Engine Mechanical — Cylinder Head","ocr_text":"ENGINE MECHANICAL — Cylinder Head                                    EM-47\n\n(d) Hand-lap the valve and valve seat with an abrasive\n    compound.\n\n13. INSPECT VALVE SPRINGS\n    (a) Using a steel square, measure the squareness of the\n        valve springs.\n    Maximum squareness: 1.5 mm (0.059 in.)\n    If squareness is greater than maximum, replace the valve\n    spring.\n\n    (b) Using calipers, measure the free length of the valve\n        spring.\n    Free length: 41.64 mm (1.6394 in.)\n    If the free length is not within specification, replace the\n    valve spring.\n\n    (c) Using a spring tester, measure the tension of the valve\n        spring at the specified installed length.\n    Installed tension:\n    16.0 kg (35. lb. 157 N) at 35.0 mm (1.378 in.)\n    If the installed tension is not as specified, replace the valve\n    spring.\n\n14. INSPECT CAMSHAFT AND BEARING CAPS\n    (a) Place the camshaft on V blocks and, using a dial\n        gauge, measure the circle runout at the center journal.\n    Maximum circle runout: 0.03 mm (0.0012 in.)\n    If circle runout is greater than maximum, replace the\n    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