{"model":"mk3","model_name":"MK3 Supra","vehicle":"Toyota Supra A70 (1986.5–1992, 7M-GE / 7M-GTE)","document":"Repair Manual","section":"LU","section_name":"Lubrication System","page":4,"pages_in_section":18,"title":"Troubleshooting","section_header":"Lubrication System — Troubleshooting, Oil Pressure Check","ocr_text":"TROUBLESHOOTING\n\nProblem | Possible cause | Remedy | Page\n\nOil leakage | Cylinder head, cylinder block or oil pump body damaged or cracked | Repair as necessary | \n | Oil seal faulty | Replace oil seal | EM-81\n | Gasket faulty | Replace gasket | \n\nLow oil pressure | Oil leakage | Repair as necessary | \n | Relief valve faulty | Repair relief valve | LU-7\n | Oil pump faulty | Repair oil pump | LU-7\n | Engine oil poor quality | Replace engine oil | LU-5\n | Crankshaft bearing faulty | Replace bearing | EM-63\n | Connecting rod bearing faulty | Replace bearing | EM-63\n | Oil filter clogged | Replace oil filter | LU-5\n\nHigh oil pressure | Relief valve faulty | Repair relief valve | LU-7\n\nOIL PRESSURE CHECK\n\nRecommended Viscosity (SAE):\n\n[CHART showing viscosity ranges from -20 to 40°C with corresponding SAE grades 5W-20, 5W-30, 10W-30, 10W-40, 20W-40, 20W-50]\n\nNOTE: SELECT SUITABLE GRADE AND TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE\nLU0881\n\n[DIAGRAM: Dipstick showing L and F marks]\nEM1103\n\n[DIAGRAM: Oil Pressure Gauge installation on engine]\nLU0882\n\n1. CHECK OIL QUALITY\nCheck the oil for deterioration, entry of water, discoloring or thinning.\nIf oil quality is poor, replace.\nUse API grade SG, multigrade, fuel-efficient and recommended viscosity oil.\n\n2. CHECK OIL LEVEL\nThe oil level should be between the \"L\" and \"F\" marks on the dipstick.\nIf low, check for leakage and add oil up to the \"F\" mark.\n\n3. REMOVE OIL PRESSURE SENDER GAUGE\n\n4. INSTALL OIL PRESSURE GAUGE\n\n5. START ENGINE\nStart engine and warm it up to normal operating temperature.\n\n6. MEASURE OIL PRESSURE\nOil pressure:\nAt idle speed   0.3 kg/cm² (4.3 psi, 29 kPa)\n                or more\nAt 3,000 rpm   2.5 – 5.0 kg/cm²\n                (36 – 71 psi, 245 – 490 kPa)\n\nHINT: Check for oil leakage after reinstalling the oil pressure sender gauge.","image":"https://tsrm.sasquatchvc.com/images/mk3/LU/LU_004.png","url":"https://tsrm.sasquatchvc.com/mk3/tsrm/LU/4","prev":{"page":3,"url":"https://tsrm.sasquatchvc.com/mk3/tsrm/LU/3","api":"https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/LU/3"},"next":{"page":5,"url":"https://tsrm.sasquatchvc.com/mk3/tsrm/LU/5","api":"https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/LU/5"},"section_url":"https://tsrm.sasquatchvc.com/mk3/tsrm/LU","section_api_pages":["https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/LU/1","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/LU/2","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/LU/3","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/LU/4","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/LU/5","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/LU/6","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/LU/7","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/LU/8","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/LU/9","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/LU/10","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/LU/11","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/LU/12","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/LU/13","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/LU/14","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/LU/15","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/LU/16","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/LU/17","https://tsrm.sasquatchvc.com/api/pages/mk3/tsrm/LU/18"],"note":"OCR transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}