Toyota
Ford Kuga
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Accessory Drive - 2.5L Duratec (147kW/200PS) - VI5 » Accessory Drive
Symptom Chart

Symptom Possible Sources Action
Accessory drive belt noise Accessory drive system CHECK the system with the engine running and the accessory drive belt removed (only run the engine for a very short period). If a noise is apparent, the cause is not the accessory drive system. If a noise is not apparent, the cause is the accessory drive system. CHECK where the noise is coming from. Use a stethoscope or other listening device to determine the source of the noise. INSTALL new components as necessary.

TEST the system for normal operation.

Accessory drive belt incorrectly installed. CHECK the accessory drive belt is correctly installed in the pulley grooves. INSTALL a new accessory drive belt as necessary.

REFER to: Accessory Drive Belt (303-05 Accessory Drive - 2.5L Duratec (147kW/200PS) - VI5, Removal and Installation).

and/or REFER to: Air Conditioning (A/C) Compressor Belt (303- 05 Accessory Drive - 2.5L Duratec (147kW/200PS) - VI5, Removal and Installation).

TEST the system for normal operation.

Pulley(s). CHECK the pulley(s) for damage, freedom of rotation, stone entrapment and alignment.

INSTALL new components as necessary. TEST the system for normal operation.

Lubricant or other contamination. CHECK the accessory drive belt for contamination or damage. RECTIFY the source of the leak and INSTALL a new accessory drive belt.

REFER to: Accessory Drive Belt (303-05 Accessory Drive - 2.5L Duratec (147kW/200PS) - VI5, Removal and Installation).

and/or REFER to: Air Conditioning (A/C) Compressor Belt (303- 05 Accessory Drive - 2.5L Duratec (147kW/200PS) - VI5, Removal and Installation).

TEST the system for normal operation.

NOTE: Squeal is defined as a continuous shriek, most noticeable when the engine is being accelerated or with electrical load.

Accessory drive belt squeal

Accessory drive belt tensioner worn, damaged or contaminated with oil.
  • CHECK the accessory drive belt tensioner for correct operation, damage or contamination.

    REFER to the Accessory Drive Belt Tensioner Component Test in this procedure. INSTALL a new accessory drive belt tensioner as necessary.

    REFER to: Accessory Drive Belt Tensioner (303-05 Accessory Drive - 2.5L Duratec (147kW/200PS) - VI5, Removal and Installation).

    or REFER to: Air Conditioning (A/C) Compressor Belt Tensioner (303-05 Accessory Drive - 2.5L Duratec (147kW/200PS) - VI5, Removal and Installation).

    TEST the system for normal operation.

NOTE: Whine is defined as a continuous noise at the same frequency, generally associated with plastic pulleys.
  • Accessory drive belt whine
Poor surface finish on accessory drive belt idler pulley flat surface(s). REMOVE the accessory drive belt.

REFER to: Accessory Drive Belt (303-05 Accessory Drive - 2.5L Duratec (147kW/200PS) - VI5, Removal and Installation).

and/or REFER to: Air Conditioning (A/C) Compressor Belt (303- 05 Accessory Drive - 2.5L Duratec (147kW/200PS) - VI5, Removal and Installation).

INSPECT the idler pulley(s) for surface finish. INSTALL a new idler pulley(s) as necessary.

TEST the system for normal operation.

Accessory drive belt idler pulley bearing failure. REMOVE the accessory drive belt.

REFER to: Accessory Drive Belt (303-05 Accessory Drive - 2.5L Duratec (147kW/200PS) - VI5, Removal and Installation).

and/or REFER to: Air Conditioning (A/C) Compressor Belt (303- 05 Accessory Drive - 2.5L Duratec (147kW/200PS) - VI5, Removal and Installation).

INSPECT the idler pulley(s) for smooth rotation. INSTALL a new idler pulley(s) as necessary.

TEST the system for normal operation.

NOTE: Chirp is defined as a twittering noise, often intermittent

Accessory drive belt chirp

Pulley misalignment (usually evident at idle).
  • CHECK that the accessory drive belt is running centrally on the flat pulleys. TEST the system for normal operation.
  • CHECK the pulleys for excessive end float and bent flanges.
  • With the engine running at idle, use a stethoscope to identify the source of the noise.

    INSTALL new components as necessary. TEST the system for normal operation.

NOTE: Rattle is defined as a metallic knocking noise
  • Accessory drive belt rattle
Accessory drive belt tensioner hitting the end stops. CHECK the accessory drive belt tensioner for correct operation or damage. REFER to the Accessory Drive Belt Tensioner Component Test in this procedure. INSTALL a new accessory drive belt tensioner as necessary.

REFER to: Accessory Drive Belt Tensioner (303-05 Accessory Drive - 2.5L Duratec (147kW/200PS) - VI5, Removal and Installation).

or REFER to: Air Conditioning (A/C) Compressor Belt Tensioner (303-05 Accessory Drive - 2.5L Duratec (147kW/200PS) - VI5, Removal and Installation).

TEST the system for normal operation.

Loose components or hardware. CHECK the components or hardware for correct installation and tighten as necessary.

TEST the system for normal operation.

    More about «Accessory Drive»:

    Inspection and Verification

    Accessory Drive Belt Concerns

    Symptom Chart

    Component Tests

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