Great Wall GW491QE, Руководство по обслуживанию

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GI-11
Engine฀service฀/maintenance฀data-Troubleshooting
5.Unstable idle-speed for engine
Cause of failure Methods of elimination
1 With air leakage
1 T he intake manifold pipe is leaking air.
2 Failure in ignition system
3 Failure in valve mechanism
1 B ad sealing of valve;
2 Hydraulic tappet is not working well;
3 Clearance between the valve rod and
the valve guiding rod is much big.
4 The pad of cylinder is leaking air.
5 The supply of petrol is not smooth.
1
1 Check the intake manifold pipe and gasket.
2 A rticle 2 of “engine not start or start with difficulty ”.
3
1 A brade the valve.
2 Change the hydraulic retaining column.
3 Change the valve or the guiding rod of valve
4 Change the cylinder pad
5 R efer to article 3 of “engine slack”.
6.Abnormal sound occurred in engine
Cause of failure Methods of elimination
1 Clearance produced due to the failure in
hydraulic retaining column
2 Piston pin too much loose.
3 Piston, piston ring, and cylinder abraded
too much.
4 The bushing of connection rod abraded too
much.
5 Main bushing abraded too much.
6 T hrust piece of crankshaft abraded too much.
7 Much clearance between camshaft and the
thrust plate of camshaft.
8 Timing chain and timing chainwheel abraded
too much.
9 Chain tensioner null and void.
10 Too much carbon deposit in the combustion
chamber of cylinder.
11 Petrol is not consistent to the specification.
1 Check and change the hydraulic retaining column.
2 Change the piston pin or piston.
3 Check, repair, and change the rank.
4 Change it.
5 Change it.
6 Change it.
7 Change the thrust plate of camshaft.
8 Change it.
9 Change it.
10. Clear away the carbon deposit.
11 Follow the technical specifications.
7.Large consumption of petrol
Cause of failure Methods of elimination
1 Pipeline has leakage of petrol oil.
2 A ir filter is blocked.
3 Failure in ignition system
1 E rror timing of ignition.
2 Failure in spark plug.
4 B ad compression of engine.
5 Slippery of clutch.
1 Tighten connectors and clamps at each point.
2 Check and clean the air filter.
3
1 A djust the timing.
2 Check or change the spark plug
4 R efer to article 1 of “engine slack “
5 Check and adjust the clutch.
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