Chery QQ Service Manual 465 Engine Mechanical System
- 9 –
Chery Automobile Co., Ltd
to the regulation
l
Tighten or replace exhaust manifold washer.
l
Exhaust expansion connection parts damage or wear.
l
Replace parts if necessary.
l
Exhaust pipe is burned or rusty.
l
Replace the exhaust pipe if necessary.
l
Muffler is damaged or burned.
l
Replace the muffler assembly.
l
Exhaust clip and/or bracket are damaged or loosened.
l
Replace the parts if necessary.
2 Valve train
Symptom
Cause of malfunction/Troubleshooting
There is some noise while
idling, the noise becomes
lounder when the rotational
speed is much higher.
This kind of noise has nothing to do with malfunction
of tappet, it is becomes more obvious under low gear
speed of 10-15 km/h, this kind of noise sounds just
like ticktack, the following condition can result in this
kind of noise:
l
Valve end or Valve rocker gasket wear
l
Clearance of valve stem and valve guide is too
big.
l
Radial run-out of valve seat is too remarkable.
l
Radial run-out of valve working surface is too
remarkable.
l
Malposition of valve spring
1 Rock the engine until the nosing valve depart from
the valve seat.
2 Rotate valve spring and valve
3 If the noise is corrected ,check the valve spring to
see whether or not it is in malposition. If the
malposition exceeds the limit, replace the valve
spring.
Driving at high-speed ,there is
some noise, while driving at
low-speed, the noise disappear.
High-speed driving noise may result from the
following condition:
Oil level is too high. If oil level is higher than FULL
(full mark),crankshaft balancer will stir the oil into
foams, when the foam is pumped into the tappet, the
