{"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":74,"pages_in_section":98,"title":"Inspection of Cylinder Block","section_header":"Engine Mechanical — Cylinder Block","ocr_text":"EM 74\t\t\tENGINE MECHANICAL — Cylinder Block\n\nINSPECTION OF CYLINDER BLOCK\n\n1.\tREMOVE GASKET MATERIAL\nUsing a gasket scraper, remove all the gasket material from\nthe cylinder block surface.\n\n2.\tCLEAN CYLINDER BLOCK\nUsing a soft brush and solvent, clean the block.\n\n3.\tINSPECT TOP OF CYLINDER BLOCK FOR FLATNESS\nUsing a precision straight edge and thickness gauge, meas-\nure the surfaces contacting the cylinder head gasket for\nwarpage.\nMaximum warpage: 0.05 mm (0.0020 in.)\nIf warpage is greater than maximum, replace the cylinder\nblock.\n\n4.\tINSPECT CYLINDERS FOR VERTICAL SCRATCHES\nVisually check the cylinder for vertical scratches.\nIf deep scratches are present, rebore all six cylinders. If\nnecessary, replace the cylinder block.\n\n5.\tINSPECT CYLINDER BORE DIAMETER\nUsing a cylinder gauge, measure the cylinder bore diameter\nat positions A, B and C in the thrust and axial directions.\n\nFront ←— ⊕ O Thrust\n\t\t  Direction\n\t\t  O Axial\n\t\t    Direction\n\nA ——|— 10 mm\n\t(0.39 in.)\nB ——|— Middle\nC ——|— 10 mm\n\t(0.39 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