Chery QQ Service Manual 465 Engine Mechanical System
- 5 –
Chery Automobile Co., Ltd
0W—30
<-30
>+40
A3/B3
SJ/CF
0W—40
<-30
>+40
A3/B3
SJ/CF
Notice:
It is applicable only under the circumstance of ACEA and API standard being listed
ACEA standard can not replace API standard, on the contrary ,API standard can take the
place of ACEA standard.
Viscosity is not equal to quality.
CHAPTER 2 Diagnosis of the Engine
I Engine pressure test.
It can make sure the condition of piston ring
、
valve and cylinder head gasket to carry out
compression pressure test for the engine cylinder.
1 The storage battery must be up to the standard of normal voltage or close to the normal
voltage if you want the operational temperature of engine to be normal.
2 Turn off the engine.
3 Stop ignition.
4 Stop fuel system.
5 Remove out all spark plugs.
6 Remove out vacuum pipe in throttle valve body.
7 Lock the throttle valve to be open with a limit stop.
8 Check the cylinder pressure according to the following steps:
You shall fix the pressure gauge in spark-plug hole, while the engine working along with the
starter, you should make the testing cylinders finish 4 compression strokes at least. You shall
examine and record the readings of every stroke pressure gauge, then throw out the pressure
gauge, as to the other cylinders, repeat above-mentioned steps to carry out the pressure test.
9 Record all pressure readings of all cylinders
Standard pressure of cylinder:1.32Mpa ( Rotational speed of engine shall be no less than
300r/min), pressure of every cylinder shall be no less than 1.10Mpa
,
pressure difference
between any two cylinders shall be no more than 0.098Mpa.
10 Example of possible testing results are introduced as follows:
a Pressure of all cylinders shall be steadily improved to approach the stipulated pressure
promptly, when the pressure is tested to be normal
b It is probably due to piston ring if pressure of the first stroke is too low, but it is showing
a tendency to go up in the afterwards strokes but not reaching the normal standard yet ,or
the pressure goes up obviously after three times being infected with oil.