9. Intake/exhaust system
159
Failure Diagnosis
Phenomenon Causes Troubleshooting
Noise or vibration
Rotating part is contacted Repair or replace it
Unbalanced rotation of a rotor Repair or replace it
Burn Repair or replace it
Loose joint Check or repair it
Deformed or damaged intake systemhose Replace it
Poor clamping state Adjust and tighten the clamp
Contaminated or damaged air filter
Replace and check if the impeller of the
turbocharger is damaged
Leakage of coolant from the turbocharger or oil from
the oil hose
Replace the hose and the gasket
Leakage of gas from the exhaust manifold Replace the gasket or tighten the fixing nut
Poor turbo actuator operation Replace the turbocharger
Leakage from the engine block and the exhaust
manifold
Check the engine
Contaminated blowby gas and abnormal oil amount
Check the turbo impeller and the turbo
intake outlet
Large gap of the turbocharger wheel, causing inter-
ference with the wall
Check if there is any sand or metallic for-
eign substance
Damaged turbocharger wheel
Check if there is any sand or metallic for-
eign substance
Damaged wheel and shaft of the turbocharger
Check if there is any sand or metallic for-
eign substance
Poor rotating force of the turbocharger wheel
Check if there is any sand or metallic for-
eign substance
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