No
Step 3
Check the existence of the flywheel cracking, deformation and other components intervention. Is the flywheel
normal?
Yes
Replace the flywheel assembly. Confirm
whether the fault is fixed.
No
Step 4
Check whether the main bearing clearance is too large. Does it exceed the specified value?
Standard Value: 0.006-0.022 mm (0.0002-0.0008 in)
Yes
Replace the main bearings. Confirm whether
the fault is fixed.
No
Step 5
Check connecting rod bearing clearance. Does it exceed the specified value?
Standard Value: 0.020-0.044 mm (0.0007-0.0017 in)
Yes
Replace the connecting rod bearings.
Confirm whether the fault is fixed.
No
Step 6
Confirm diagnostic completed.
2.6.7.6 Slight vibration when engine is warming up.
Step 1
Use scan tool to read the "Knock" related data. Is the engine knocking?
Yes
Check the engine timing systems and fuel
quality. Repair the faulty part.
No
Step 2
Check whether there is exhaust manifold leakage?
Yes
Replace the exhaust pipe pad and tighten the
exhaust pipe.
No
Step 3
Check connecting rod bearing clearance, Does it exceed the specified value?
Standard Value: 0.020-0.044 mm (0.0007-0.0017 in)
Yes
Replace the connecting rod bearings.
Confirm whether the fault is fixed.
2-320
Engine Mechanical System JL4G18-D
Engine
EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
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