Accessory Drive - 2.0l Ecoboost — Ford Focus ST III (2012-2015)

Accessory Drive - Component Location

Note. Typical application shown in illustration.

Scheme 7: Identifying Accessory Drive Related Component

Item	Description
1	Automatic belt tensioner, accessories drive belt
2	Coolant pump pulley
3	Generator pulley
4	Crankshaft pulley / vibration damper
5	Pulley - A/C compressor
6	Multi-groove belt, A/C compressor
7	Multi-groove belt, accessory units (excluding A/C compressor)

Inspection and Verification

Verify the customer concern.
Visually inspect for obvious signs of mechanical damage. Visual Inspection Chart MECHANICAL SPECIFICATIONS Damaged or contaminated accessory drive belt Damaged or contaminated pulley(s) Incorrect accessory drive belt Incorrect fitment of the accessory drive belt Accessory drive belt tensioner Accessory drive belt idler pulley Generator Power steering pump Power steering pump leakage Air conditioning (A/C) compressor Pulley(s) Loose hardware
If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

Accessory Drive Belt Concerns

Note. Do not lubricate the accessory drive belt, accessory drive belt tensioner or idler pulley(s) as potential damage to the accessory drive belt material construction, accessory drive belt tensioner damping mechanism, accessory drive belt tensioner pulley bearing and idler pulley(s) bearing may occur.

Cracking

Accessory drive belts are made from rubber which hardens with time and can develop cracks. As the accessory drive belt runs on the back of some of the pulleys, the cracks are opened up. Small cracks are not considered to be a failure of the accessory drive belt. Only if the crack is deep enough to reach the bottom of the groove to expose the cord or any chunks are found to be missing from the accessory drive belt, is the accessory drive belt condition considered to be unacceptable.

Scheme 8

Scheme 8: Accessory Drive Belt Concerns

Scheme 9

Scheme 10

Check the accessory drive belt for cracks. If the damage exceeds the acceptable limit, install a new accessory drive belt. Refer to: «Accessory Drive Belt»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost). Chunking Chunking describes the condition where long lengths of rubber become detached from the ribs of the accessory drive belt. This is considered to be a failure of the accessory drive belt. (Scheme 8): Identifying V-Ribbed Serpentine Belt With Chunks Of Rib Missing
Check the accessory drive belt for damage. If any chunks are found to be missing, install a new accessory drive belt. Refer to: «Accessory Drive Belt»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost). Pilling Pilling is dust that forms in between the ribs of the accessory drive belt from rubber that is worn off the accessory drive belt when it is new. There may also be loose particles left on the accessory drive belt during the manufacturing process. These are worn off and form into small balls of rubber that then get trapped in the grooves of the accessory drive belt. This condition will usually clear itself within 4800 km - 8000 km (3000 miles - 5000 miles) of normal driving. (Scheme 9): Identifying V-Ribbed Serpentine Belt With Piling
Check the accessory drive belt for pilling. The condition of the accessory drive belt should be compared against the illustration. Small scattered pills. Not considered a concern. No action required. Small scattered pills. Not considered a concern. No action required. Longer pills up to 50% of the rib height. Possible noise concern. INSTALL a new accessory drive belt if noise is apparent. Refer to: «Accessory Drive Belt»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost). Longer pills up to 50% of the rib height. Possible noise concern. INSTALL a new accessory drive belt if noise is apparent. Refer to: «Accessory Drive Belt»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost). Heavy deposits in the grooves. Possible noise and stability concern. INSTALL a new accessory drive belt. Refer to: «Accessory Drive Belt»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost). Heavy deposits in the grooves. Possible noise and stability concern. INSTALL a new accessory drive belt. Refer to: «Accessory Drive Belt»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost). Incorrect fitment Accessory drive belt noise can be generated by the accessory drive belt being incorrectly fitted on the pulley as shown in the following illustration. Make sure that all the V grooves on the accessory drive belt contact correctly with the pulley. (Scheme 10): Identifying Drive Belt - Incorrect Installation Position
If the cause is not visually evident, verify the symptom and refer to the Symptom Chart. 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»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost). 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»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost). 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 in «Component Tests»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost). INSTALL a new accessory drive belt tensioner as necessary. Refer to: «Accessory Drive Belt Tensioner»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost). 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). Accessory drive belt idler pulley bearing failure. REMOVE the accessory drive belt. Refer to: «Accessory Drive Belt»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost). INSPECT the idler pulley(s) for surface finish. INSTALL a new idler pulley(s) as necessary. TEST the system for normal operation. REMOVE the accessory drive belt. Refer to: «Accessory Drive Belt»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost). 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. Loose components or hardware. CHECK the accessory drive belt tensioner for correct operation or damage. REFER to the Accessory Drive Belt Tensioner in «Component Tests»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost). INSTALL a new accessory drive belt tensioner as necessary. TEST the system for normal operation. CHECK the components or hardware for correct installation and tighten as necessary. TEST the system for normal operation. Accessory drive belt fraying Accessory drive belt. Pulley(s). CHECK the extent of the fraying by referring to the illustrations shown in the Visual Inspection in «Inspection and Verification»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost__inspection-and-verification). Only INSTALL a new accessory drive belt if the fraying is within the criteria quoted in the Visual Inspection in «Inspection and Verification»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost__inspection-and-verification). TEST the system for normal operation. CHECK the pulley(s) for damage, freedom of rotation and alignment. INSTALL new components as necessary. TEST the system for normal operation.

Accessory Drive Belt Tensioner - Static Check

The accessory drive belt tensioner may be checked statically as follows

Inspect the area surrounding the accessory drive belt tensioner for lubricant or other contamination. Rectify any leaks before installing a new accessory drive belt tensioner. If the accessory drive belt tensioner is contaminated, do not attempt to clean it as the damping mechanism inside may be damaged. INSTALL a new accessory drive belt tensioner as necessary. Refer to: «Accessory Drive Belt Tensioner»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost) . TEST the system for normal operation.
Detach the accessory drive belt in the area of the accessory drive belt tensioner.
Using the correct tool, move the accessory drive belt tensioner from its relaxed position through its full stroke and back to the relaxed position to make sure there is no excessive stick, grab or bind, and to make sure there is tension on the accessory drive belt tensioner spring.
Rotate the accessory drive belt tensioner pulley and check for damage, freedom of rotation and alignment. INSTALL a new accessory drive belt tensioner as necessary. Refer to: «Accessory Drive Belt Tensioner»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost) . TEST the system for normal operation.
If the accessory drive belt tensioner meets the above criteria, proceed to test the accessory drive belt tensioner dynamically. If the accessory drive belt tensioner does not meet the above criteria, INSTALL a new accessory drive belt tensioner. Refer to: «Accessory Drive Belt Tensioner»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost) . TEST the system for normal operation.

Accessory Drive Belt Tensioner - Dynamic Check

The accessory drive belt tensioner may be checked dynamically as follows

With the engine running, observe the accessory drive belt tensioner movement. The accessory drive belt tensioner should move (respond) when the engine is accelerated rapidly or when the A/C clutch cycles ON and OFF (the degree of movement can be up to 4 mm). If the accessory drive belt tensioner movement is not constant without engine acceleration or A/C clutch cycling, a pulley or shaft is possibly bent, out of round, or the damping mechanism inside the accessory drive belt tensioner may be damaged. INSTALL a new accessory drive belt tensioner as necessary. Refer to: «Accessory Drive Belt Tensioner»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost) . TEST the system for normal operation.
Excessive accessory drive belt rideout (uneven depth of grooves in the accessory drive belt) may cause excessive accessory drive belt tensioner movement. Check the condition by installing a new accessory drive belt. Refer to: «Accessory Drive Belt»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost) . TEST the system for normal operation.

Air Conditioning (A/C) Compressor Belt

SPECIAL TOOL(S) / GENERAL EQUIPMENT 303-1596 Installer, Stretchy Belt Knife

Scheme 11

Scheme 11: Air Conditioning (A/C) Compressor Belt

Removal

WARNING

Make sure that the ignition key is removed.

Scheme 12

Scheme 13

Scheme 14

Refer to: Jacking and Lifting - Overview ( «JACKING AND LIFTING - OVERVIEW»(/ford/focus-st/iii-2012-2015/remont/hoistjack/#jacking-lifting-except-electric) ).
(Scheme 11): Locating Engine Lower Front Bracket Bolts
(Scheme 12): Locating Engine Lower Cover Bolts
General Equipment: Knife (Scheme 13): Cutting Power Steering Pump Drive Belt

Scheme 15

Scheme 15: Installation

Special Tool(s): 303-1596 (Installer, Stretchy Belt)
(Scheme 15): Checking Power Steering Pump Drive Belt
see scheme 10: Locating Engine Lower Cover Bolts
see scheme 11: Locating Engine Lower Front Bracket Bolts

Note. Removal steps in this procedure may contain installation details.

Scheme 16

Scheme 16: Removal

Scheme 17

Refer to: «Air Conditioning (A/C) Compressor Belt»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost__air-conditioning-ac-compressor-belt).
(Scheme 16): Removing Engine Upper Cover Bolts
(Scheme 17): Removing Accessory Drive Belt

Installation

To install, reverse the removal procedure. Refer to: «Air Conditioning (A/C) Compressor Belt»(/ford/focus-st/iii-2012-2015/remont/accessory-drive-belts/#accessory-drive-20l-ecoboost__air-conditioning-ac-compressor-belt) .