Engine

normal operation after the repair.

Accessory drive belt Defective/worn or CARRY OUT the Engine Accessory Test. noise, squeal or chirping incorrect accessory REFER to: Noise, Vibration and

drive belt Harshness (NVH) (100-04 Noise, Misaligned pulley(s) Vibration and Harshness, Diagnosis and Pulley runout Testing).

INSPECT components and INSTALL new

Damaged or worn

parts as necessary. Refer to the

accessory drive

appropriate section in Group 303 for the

component or idler

procedure. TEST the system for normal

Fluid contamination of

operation after the repair.

the accessory drive belt or pulleys Damaged or worn accessory drive belt tensioner Damaged pulley grooves

Clunking noise Coolant pump has CHECK the coolant pump for excessive

excessive end play or end play. INSPECT the coolant pump for imbalance imbalance with the drive belt off.

INSTALL a new coolant pump as necessary. Refer to the appropriate section in Group 303 for the procedure. TEST the system for normal operation after the repair.

Whine/hum - occurs when Fuel pump module Acceptable condition. Fuel pump module unlocking the vehicle or turns on before engine starts to prime the opening the door with the fuel system. engine off Gasoline Turbocharged Direct Injection (GTDI) only

Whine or moaning noise Air intake system CHECK the air cleaner and ducts for

correct fit. INSPECT the air intake system for leaks or damage. REPAIR as necessary. TEST the system for normal operation after the repair.

Whistling noise - normally Air intake system CHECK the air intake ducts, air cleaner, accompanied with poor throttle body and vacuum hoses for leaks idle condition and correct fit. REPAIR or ADJUST as

necessary. TEST the system for normal operation after the repair.

Turbocharger intake REPAIR or INSTALL a new tube as tube assembly leaking necessary. TEST the system for normal

operation after the repair.

Loose connections or TIGHTEN hose clamps. INSPECT for damage to air intake damage and REPAIR as necessary. hoses and tubes TEST the system for normal operation

after the repair.

Air leaks at turbine INSPECT for leaks. Leaks can usually be housing, blown joints or detected audibility or visually, by a damaged exhaust discoloration caused by escaping hot

exhaust gases. REPAIR as necessary. TEST the system for normal operation after the repair.

Carbon build up in the INSPECT the turbocharger. REFER to turbine housing the Check for Free Rotation - Off Vehicle.

REFER to: Turbocharger (303-04E Fuel Charging and Controls - Turbocharger -