Chery QQ Service Manual 465 Engine Mechanical System
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Chery Automobile Co., Ltd
IVFuel consumption
1 General description
Engine oil consumption of engine refers to amount of oil used, never to confuse fuel
consumption and oil leakage of oil pan and cylinder head.
Engine oil is used for:
1.1 Depart the contacting surface away with oil film, prevent dry friction.
1.2 Conduct heat generated from friction
1.3 Bring the residue after burning away.
It is necessary to consume certain amount of oil in order to achieve above-mentioned
aims, in other words ,it is not realistic to find a engine without oil consumption.
Generally speaking, amount of oil consumption is small, it is ok to add a little oil during
the period of replacing oil, even through you may not add the oil. Of course, you must
add the oil if oil level is lower than the minimum mark of oil consumption indicator.
Also, you should make sure that fuel level is not higher than maximum mark, otherwise
oil consumption will be more.
Generally speaking, oil consumption becomes stable after the vehicle driving several
kilometre therefore, oil consumption measurement shall be carried out after vehicle
driving 7500 km. Before measurement, you should make sure that the engine doesn’t
lose fuel because of leakage.
Dipstick is used only for the purpose of inspection not for measurement.
The engine
must be turned off at least 2 minutes before checking oil level, it may be the cause of
manufacturing tolerance if you add enough oil but the level is not reaching the maximum. It
shows that oil is overused if vehicle driving 100 km consuming more than 0.075 L oil,
causes and solutions of oil being overused are introduced as follows:
●Oil consumption indicator doesn’t have good function. Please make vehicle level, check oil
level and spend some time to make the oil subside.
● Oil viscosity is not suitable. Please use recommended SAE according to local temperature.
● Successive high-speed driving
● Heavy load drawing, such as towed vehicle. Please decrease oil mileage .
● The performance of ventilation system of crankcase is not effective.
● Oil leak. Please fasten bolts if necessary, replace gasket and seal gasket if necessary.
● Valve guide or oil seal wear or lost. Please install enlarge sized valve and/or new oil seal.
● Piston ring fracture or wear
● Piston ring or seat is installed not properly or correctly
● Installation or assembly of piston is not good.
● Cylinder head gasket and oil outlet hole is blocked.
2
Measuring method of fuel consumption
2.1 Make vehicle level when checking, temperature of engine is not less than 80 .
2.2 Make engine idling before draining the engine fuel.
2.3 Turn off the engine immediately after drainage ,record the drainage time (3 minutes)
with chronograph, test should show that drainage should be completed within 3
