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Malfunctions, causes and remedies

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  3. Malfunctions, causes and remedies

Installation and maintenance information

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HARDENED, POLISHED EDGES


CAUSE
1. Pulleys do not align
2. Reinforcing members damaged due to improper installation
3. Incorrect set configuration

REMEDY
1. Check the drive, align any misaligned pulleys and install new belt set correctly
2. Change the belt and install belt correctly
3. Always replace the entire belt set

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HEAVY EDGE WEAR, BRITTLE EDGES


CAUSE
1. Excessive slip 
2. Pulleys do not align
3. Worn pulley grooves

REMEDY
1. Change belt, set correct tension
2. Check drive, align non-aligned pulleys or replace them if necessary
3. Align or replace pulleys, change belt

optibelt-automotive-stoerung-ursache-abhilfe-stoerung_03.png

BREAKAGE AND FRAYING OF BASE COMPOUND / BELT SECTION


CAUSE
1. Belt tension too low/high
2. Lifetime exceeded
3. Foreign bodies

REMEDIES
1. Change belt
2. Set correct tension

optibelt-automotive-stoerung-ursache-abhilfe-stoerung_04.png

BELT RUNNING NOISE


CAUSE
1. Tension too low
2. Lifetime exceeded

REMEDY
1. Re-tension or change belt
2. Change belt

optibelt-automotive-stoerung-ursache-abhilfe-stoerung_05.png

CONTAMINATION OF THE BELT


CAUSE
1. Leakage of the engine or engine compartment
(such as leakage of oil, antifreeze, etc.)

REMEDY
1. Remove leak, change belt

optibelt-automotive-stoerung-ursache-abhilfe-stoerung_06.png

UNEVEN WEAR OF THE BELT SECTION


CAUSE
1. Pulleys do not align
2. Strong belt vibration

REMEDY
1. Check drive, align non-aligned pulleys or replace them if necessary, change belt
2. Check tension, retension belt if necessary

optibelt-automotive-stoerung-ursache-abhilfe-stoerung_07.png

CRACK IN BELT AFTER SHORT RUNNING PERIOD


CAUSE
1. Reinforcing members damaged due to improper installation
2. Tension set too high

REMEDY
1. Change the belt and install belt correctly
2. Change belt, set correct tension

optibelt-automotive-stoerung-ursache-abhilfe-stoerung_08.png

HARDENED, POLISHED EDGES


CAUSE
1. Improper installation tension
2. Reinforcing members of the belt damaged due to improper installation

REMEDY
1. Change belt, set correct tension
2. Change the belt and install belt correctly
3. Always replace the entire belt set

optibelt-automotive-stoerung-ursache-abhilfe-stoerung_09.png

WEAR OF THE FABRIC OF THE WEB


CAUSE
1. Tension set too high
2. Worn timing belt pulley

REMEDY
1. Change belt, set correct tension
2. Replace timing belt pulley, change belts

optibelt-automotive-stoerung-ursache-abhilfe-stoerung_10.png

WEAR OF THE TOOTH
FLANK/ROOT CRACKS
AND TOOTH SHEARING


CAUSE
1. Tension too high/low
2. Action of foreign bodies
3. Fixed timing belt pulley and/or tension idler

REMEDY
1. Change belt, set correct tension
2. Remove foreign objects, ensure the cover is positioned properly, change belt
3. Detect causes ( e.g., faulty bearing) and find remedies, change belt

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FAULTY SYSTEM COMPONENTS


CAUSE
1. Bearing play
2. Damaged tread surface

REMEDY
1. Replace guide idler pulley, tension pulley, and /or guide idler 
2. See Remedy 1.

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TIMING BELT RIPS


CAUSE
1. Foreign bodies in the drive
2. Action of foreign substances
3. Installation tension too high
4. Kinking the belt before or during assembly

REMEDY
1. Remove foreign bodies/substances, change belt
2. Change belts, ensure the cover is positioned properly
3. Change belt, set correct tension

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CRACKING ON BELT TOP SURFACE


CAUSE
1. Ambient temperature too high/low
2. Action of foreign substances
3. Stiff back bend idler
4. Ageing

REMEDY
1. Detect causes ( e.g., cooling capacity test) and find remedies, change belts
2. Change belts, ensure the cover is positioned properly
3. Replace pulley, change belts
4. Change belt

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WEAR ON EDGES


CAUSE
1. Absence of axially parallel setting; belts run against flanged pulley
2. Wheels are not set axially or timing belt cannot run aligned 
3. Flanged pulley has an imperfection, bearing play of components
4. Bearing play of components

REMEDY
1. Check drive, align non-aligned pulleys or replace them if necessary; 
change belt
2. See remedy 1.
3. Replace-tension/guide idler pulley
4. See Remedy 3.

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NOISE


CAUSE
1. Tension too high: Belts screech, squeal
2. Tension too low: Belt hits against the cover

REMEDY
1. Set correct tension
2. See Remedy 1.

optibelt-automotive-stoerung-ursache-abhilfe-stoerung_18.png

HARDENED, POLISHED EDGES


CAUSE
1. Improper installation tension
2. Reinforcing members of the belt damaged due to improper installation

REMEDY
1. Change belt, set correct tension
2. Change the belt and install correctly

optibelt-automotive-stoerung-ursache-abhilfe-stoerung_19.png

CRACK IN BELT AFTER SHORT RUNNING PERIOD


CAUSE
1. Reinforcing members damaged due to improper installation
2. Tension set too high

REMEDY
1. Change the belt and install belt correctly
2. Change belt, set correct tension

optibelt-automotive-stoerung-ursache-abhilfe-stoerung_20.png

BREAKAGE AND FRAYING OF BASE COMPOUND / BELT SECTION


CAUSE
1. Belt tension too low/high
2. Lifetime exceeded
3. Foreign bodies

REMEDIES
1. Change belt, set correct tension 
2. Change belt
3. See Remedy 2.

optibelt-automotive-stoerung-ursache-abhilfe-stoerung_21.png

FAULTY SYSTEM COMPONENTS


CAUSE
1. Bearing clearance
2. Damaged tread surface

REMEDY
1. Replace guide idler pulley, tension pulley, and/or guide idler
2. See Remedy 1.

optibelt-automotive-stoerung-ursache-abhilfe-stoerung_22.png

UNEVEN WEAR OF THE BELT SECTION


CAUSE
1. Pulleys do not align
2. Strong belt vibration

REMEDY
1. Check drive, align non-aligned pulleys or replace them if necessary, change belt
2. Check tension, retension or change belt if necessary

optibelt-automotive-stoerung-ursache-abhilfe-stoerung_23.png

CONTAMINATION OF THE BELT


CAUSE
1. Leakage of the engine or engine compartment
    (such as leakage of oil, antifreeze, etc.)

REMEDY
1. Remove leak, change belt

RUNNING NOISE OF THE BELT


CAUSES
1. Leakage of the engine or the engine compartment
(such as leakage of oil, antifreeze, etc.)

REMEDIES
1. Remove leak, change belts

optibelt-automotive-stoerung-ursache-abhilfe-stoerung_24.png

BELT RUNNING NOISE


CAUSE
1. Tension too low
2. Lifetime exceeded

REMEDY
1. Re-tension or change belt
2. Change belt

SAFETY TIPS

  • Please observe installation regulations and safety instructions supplied by the manufacturer of the car.
  • Please only perform installation of the drive belts with special tools and a minimum exertion of force! The use of screwdrivers, crowbars or such tools is prohibited.
  • Do not treat the control unit components with corrosive chemicals. Belts must not come into contact with oil or similar substances.
  • Fill in the timing belt adhesive label legibly and attach it firmly in the engine compartment.
  • If individual components are faulty, the other components must also be replaced.

STORAGE

  • Store timing belts dry and at +15 to +25ºC.
  • If stored properly, the level of quality will be maintained for years.
  • If stored improperly, e.g. through exposure to oxygen, light, extreme temperatures or moisture, the physical properties can change and the belts will become unusable.

IMPORTANT
Until they are used, the drive belts should remain in their original packaging and stored free of any tension. When stacking, a height of 300 mm should not be exceeded or deformation may occur.