1.5L REVOTORQ ENGINE 49 Back to back swap test with a new turbocharger After all the diagnostic, and if nothing wrong is found, it may be recommended to test with a new turbocharger and decide on turbo replacement. ii. Excessive Engine Oil Consumption High engine oil consumption may also lead to overhauling 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, crankshaft oil seal, oil sump gasket, oil pump gasket, cylinder head cover gasket, turbocharger oil feeder and return lines etc. Ensure that the oil separator in the cylinder head cover is properly mounted. If no external leakage is found, determine the exact engine oil consumption, as per following procedure. Determining Exact Engine Oil Consumption ! CAUTION Do not make a rough estimate of engine oil consumption by noting the kilometers covered by the vehicle at any random stage and finding oil consumed from the topped up position taking into consideration dipstick level and oil sump capacity. NOTE Using a weight, grade, or brand of engine oil other than recommended by TATA Motors may increase engine oil consumption and/or promote engine wear. Determining oil loss by means of visually checking oil level on the dipstick is inaccurate. PROCEDURE 1. Once it is doubted that engine oil consumption is higher, place the vehicle on a level ground. 2. Ensure oil level in dipstick in its max position. 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 second 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 taken for further investigation.
RkJQdWJsaXNoZXIy MTIwNTUz