ARIA

ENGINE. 25 so on lower side and equal, it may be due to blown cylinder head gasket. D. Fuel System Check the Fuel system for fuel flow. If the flow is re- stricted change the filter. Check for any kink or blockage in the fuel lines. Check “Water in fuel indi- cator” in the instrument cluster, if illuminated drain the water from the sedimentor. E. Clutch Slippage • Clutch slipping can be confirmed by any of the following two methods: • Drive the vehicle with normal load in 3rd gear on level ground and let the speed drop down to ap- proximately 15 kmph. Now press accelerator pedal fully. With slipping clutch abnormal engine speed increase will be seen and vehicle speed will not pick up. Also clutch burning smell will be noticed. If this does not occur and vehicle picks up speed normally, it indicates that clutch does not slip. F. Brake Binding • During driving apply brakes number of times and then shift gear to neutral position and check free rolling of vehicle. Check brake drums/brake discs for overheating and if necessary jack up the vehicle and check wheels for free rotation. 2. EXCESSIVE ENGINE OIL CONSUMPTION High engine oil consumption may also lead to over- hauling of the engine but before proceeding to overhauling, check following points: • Make sure that there is absolutely no external oil leakage i.e. from the camshaft oil seal, crank- shaft oil seal, oil sump gasket, oil pump gasket, and cylinder head cover gasket, turbocharger oil feeder and return lines etc. • Ensure that the oil separator in the cylinder head cover is properly mounted. • Check that no excessive oil found in the inter- cooler piping and OMS is functioning properly. • If no external leakage is found, determine the exact engine oil consumption, as per following procedure. DETERMINING EXACT ENGINE OIL CONSUMP- TION ! CAUTION Do not make a rough estimate of engine oil con- sumption by noting the kilometers covered by the vehicle at any random stage and finding oil con- sumed from the topped up position taking into con- sideration dipstick level and oil sump capacity. PROCEDURE: 1. Once it is doubted that engine oil consumption is higher, place the vehicle on a level ground. 2. Top up oil sump to its capacity of 7.5 liters. 3. Warm up the engine so that oil temperature is 75º- 80º C. 4. Take a clean vessel; place it below the drain plug of oil sump. 5. Drain the hot oil into the clean vessel. Drain it fully. 6. Screw in oil sump drain plug and tighten it. 7. Weigh the vessel along with oil. Let this weight be ‘w1’ gms. 8. Refill the weighed oil into the oil sump. Do not spill any oil. The vessel used for draining should not be used for any other purposes. 9. Drive the vehicle approx. 200 - 300 km. This drive should include at least 30 - 40 kms. Of highway or similar road, vehicle running at about 60 kmph. 10. Let this drive distance be ‘D’ kms. 11. Immediately after the test drive, place the vehicle at the same spot from where it started. 12. Place the same previously used vessel below the Oil sump. 13. Unscrew the drain plug and drain off oil into the vessel. Drain the sump fully. 14. Weigh the vessel along with oil, now for the sec- ond time. Let this weight be ‘w2’ Gms. Find out standard oil consumption as follows: If the engine oil consumption is more than 0.2 liter per 1000 kilometers then it can be treated as high engine oil consumption and the engine can be tak- en for further investigation. 3. EXTREMELY LOW ENGINE OIL PRESSURE Check the following: • External leakages. • Oil level in sump up to maximum mark on dip- stick / Check oil level.