Инструкция по эксплуатации к двигателю 4G64 S4M (english)

Faults Symptom

Case Study

Solutions

Theengine cannot be

started of it is difficult to start it

Fuel oil pump faults Oil sprayer faults

Use the detector to check whether their working conditions are normal.

Speed sensor faults

Check the circuit of the speed sensor

Ignition system faults (1) Ignition coil is damaged (2) High tension line is damaged or

the poor connection (3) Ignition plug is damped or the

electrode accumulates the

carbon (4) Electrode clearance is too large

or too small (5) Ignition plug is damaged (6) Ignition coil faults

(1) Change ignition coil

(2) Change high tension line

(3) Dry or clear the accumulated carbon

(4) Modulate the clearance of the

ignition plug (5) Change ignition plug (6) Check ignition circuit

Reduction of the compression pressure of the cylinder (1) Poor connection of the valve,

valve seat (2) Severe abrasion of the cylinder,

piston and piston ring_

Cheek cylinder pressure (1) Grinding valve and valve seat (2) Change (3) Repair or change

Breather pipe of the crankcase falls off or disrupts

Install breather pipe again or change it

Intake manifold has air leak

Check the gasket of the intake manifold and screw up nuts

Machine oil pressure is not enough

The amount of the machine pil is not enough

Check the amount of the machine oil which should be within the requirements

Machine oil trademark is not right (its stickiness is too small)

Choose the machine oil according to

tne requirements

The temperature of the machine oil Cool the engine and check the cooling is too high system

Oil cleaner is blocked or the oil lead has oil leak

The pressure gauge of the machine oil is out of work

Change

Oil clean is blocked

Change

Machine oil consumption is too much

Oil leak

Check the oil leaking par, change oil seal and gasket or fix the connecting parts

The abrasion of the cylinder hole is too severe

Check

The abrasion of the valve stem and valvee guide

Check the valve and valve guide

The abrasion of the valve oil seal is too severe, loses elasticity, locked or cut

Change valve oil seal

Ventilation crankcase system is blocked and makes the pressure too high in the crankcase

Check and clear the ventilation crankcase system

When the engine is heating, the idle speed is not stable.

The sensor at the air damper position or connection of wire harness faults, Sensor of the water temperature or connection of the wire harness faults

Check whether the sensor at the air damper or connection of wire harness has faults. Or whether its working parameter is normal. Check whether the connection of wire harness is connected tightly.

When the engine is cooling, the idle speed is not stable.

Sensor of the water temperature or connection of the wire harness faults, Sensor of air temperature or connection of the wire harness faults

The temperature value displayed in the detector should be in accordance with the practical temperature value. Check whether the connection of wire harness is connected tightly.