ARIA

ENGINE 26 • Oil pressure switch / indicator for proper func- tioning. • Functioning of pressure relief valve on oil pump. • Oil pumps performance using a suitable pres- sure gauge. If low oil pressure is not on account of above factors, wear of journals/bearings is in- dicated for which overhaul of engine may be considered. • Leakage through oil pumps back plate. 4. MECHANICAL FAILURES Defective water pump, idler tensioner, air lock in HLA, damaged turbocharger, engine mounts or al- ternator can be a source of mechanical noise. Defect can be located by replacing alternator, water pump, engine mounts, and idler tensioner with a new one. Metallic knocking sound from an engine may be due to faulty injection, excessive clearance in main and big end bearings, small end bush, tappets, piston slap, seizing of piston rings, scored cylinder bore or breakage of any moving parts. Overhauling of fuel system will set right Diesel Knock. Dismantling of engine may be considered if still noise occurs even after attending all above mentioned problems. Check for EMS problems if any. 2.1.2.2 REGULAR MAINTENANCE NOTE None of the procedures should be performed with ENGINE RUNNING, unless specified in the proce- dure. A. ENGINE OIL REPLACEMENT. !! WARNING • New and used engine oil can be hazardous. • Used oil filter and oil to be disposed as per local regulation. NOTE Before draining engine oil, check engine for any oil leakage. If any leakage is found, make a note of it and repair or replace the defective part before refill- ing the engine oil. 1. Position the vehicle in a 2 poster lift. 2. Open the Engine oil filling cap. 3. Remove the stone guard (For procedure refer stone guard removal in body section) 4. Position a suitable container for collecting the drained Engine oil below the oil Sump drain plug. 5. Loosen and remove the Engine oil sump drain plug (1). 6. Drain Engine oil in the container placed in step 3. 7. After draining the oil completely, wipe the drain plug and reinstall the drain plug. NOTE When replacing the Engine Oil, allow the oil to drain completely and then refill it with new oil after ensur- ing that drain plug is reinstalled and tightened to a torque of 5±1 kg-m with new sealing washer.