TROUBLESHOOTING Problem | Possible cause | Remedy | Page Oil leakage | Cylinder head, cylinder block or oil pump body damaged or cracked | Repair as necessary | | Oil seal faulty | Replace oil seal | EM-81 | Gasket faulty | Replace gasket | Low oil pressure | Oil leakage | Repair as necessary | | Relief valve faulty | Repair relief valve | LU-7 | Oil pump faulty | Repair oil pump | LU-7 | Engine oil poor quality | Replace engine oil | LU-5 | Crankshaft bearing faulty | Replace bearing | EM-63 | Connecting rod bearing faulty | Replace bearing | EM-63 | Oil filter clogged | Replace oil filter | LU-5 High oil pressure | Relief valve faulty | Repair relief valve | LU-7 OIL PRESSURE CHECK Recommended Viscosity (SAE): [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] NOTE: SELECT SUITABLE GRADE AND TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE LU0881 [DIAGRAM: Dipstick showing L and F marks] EM1103 [DIAGRAM: Oil Pressure Gauge installation on engine] LU0882 1. CHECK OIL QUALITY Check the oil for deterioration, entry of water, discoloring or thinning. If oil quality is poor, replace. Use API grade SG, multigrade, fuel-efficient and recommended viscosity oil. 2. CHECK OIL LEVEL The oil level should be between the "L" and "F" marks on the dipstick. If low, check for leakage and add oil up to the "F" mark. 3. REMOVE OIL PRESSURE SENDER GAUGE 4. INSTALL OIL PRESSURE GAUGE 5. START ENGINE Start engine and warm it up to normal operating temperature. 6. MEASURE OIL PRESSURE Oil pressure: At idle speed 0.3 kg/cm² (4.3 psi, 29 kPa) or more At 3,000 rpm 2.5 – 5.0 kg/cm² (36 – 71 psi, 245 – 490 kPa) HINT: Check for oil leakage after reinstalling the oil pressure sender gauge.