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ENGINE2.2LDICOR
for overheating and if necessary jack up the
vehicle and check wheels for free rotation.
f. ECU
Rectify the ECU error and check the perfomance
of engine
2. EXCESSIVEENGINEOILCONSUMPTION
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.
DETERMININGEXACTENGINEOILCONSUMPTION:
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.
PROCEDURE:
Once it is doubted that engine oil consumption is
higher, place the vehicle on a level ground.
Top up oil sump to its capacity of 7.5 litres.
Warm up the engine so that oil temperature is 75º
- 80º C.
Take a clean vessel, place it below the drain plug
of oil sump.
Drain the hot oil into the clean vessel. Drain it fully.
Screw in oil sump drain plug and tighten it.
Weigh the vessel along with oil. Let this weight
be ‘w1’ gms.
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.
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.
Let this drive distance be ‘D’ kms.
Immediately after the test drive, place the vehicle
at the same spot from where it started.
Place the same previously used vessel below the
oil sump, unscrew the drain plug and drain off oil
into the vessel. Drain the sump fully.
Weigh the vessel along with oil, now for the
second time. Let this weight be ‘w’ gms.
Find out standard oil consumption as -
2. EXTREMELYLOWENGINEOILPRESSURE
Check the following:
External leakages.
Oil level in sump up to maximummark on dipstick/
Check oil level.
Oil pressure switch / indicator for proper
functioning.
Functioning of pressure relief valve on oil pump.
Oil pump performance using a suitable pressure
gauge. If lowoil pressure is not on account of above
factors, wear of journals/bearings is indicated for
which overhaul of engine may be considered.
Leakage through oil pump back plate.
4. MECHANICALFAILURES
Defective water pump, idler tensioner, air lock in
HLA, damaged turbocharger, engine mounts or
alternator can be a source of mechanical noise.
Defect can be located by replacing alternator,
water pump, engine mounts, idler tensioner with
a new one. Metallic knocking sound froman 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.