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Tensioner pulley
Cam belt
Timing belt tensioner pulley
Guide pulley
Timing belt deflection pulley
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Deflection / guide pulley, v-belt
Replace a Spare part Drive belt tensioner – a defective one or if the limit of use has been already reached. Find out useful information about Drive belt tensioner
Faults of the belt tensioner
bearing play;
deformation of the bracket;
Backlash of housing;
tensioner seizure.
Symptoms of the belt tensioner fault
displacement of the belt;
falling of the belt from the shaft;
too strong or weak belt tension;
no battery charge signal;
uneven wear of the belt;
Free belt movement in the pulley;
difficulty in managing;
engine wobble;
jerks during rotation of the roller;
traces of the belt on the rollers;
whistle while working;
vibration of roller and belt;
emergency stop of the vehicle;
belt slipping.
Causes of the belt tensioner malfunction
incorrect adjustment;
presence of a belt deflection;
corrosion of the cover;
damage to the spring;
wear of sleeves;
any foreign particles;
heavy loads;
severe contamination;
mechanical damage.
Diagnostics
For the diagnosis of the belt tensioner you must determine the level of tension using a special device. Start the diagnosis by an inspection. To do this, dismantle the belt and inspect the tensioner bearing. Heavy wear, presence of backlash, damage, destruction of the bearing require immediate replacement of the device. Then check the bracket. It should have no bends and damage. After that pay attention to the belt. The size of its deflection should not exceed 1.5 cm.
Replacing the belt
Repair works are not carried out, because the part has a monolithic structure. To replace the part you need to disconnect the battery terminals, disconnect the body. Then, using the tire lever you should fix the crankshaft to avoid possible rotation. It is necessary to loosen the belt by loosening the bolts, remove the bracket. Next, using a set of spanners, unscrew tensioner bolts, dismantle the belt and the part. In place of the defective parts install new ones.
