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Condition
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Cause
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DEFINITION: The following describes conditions of the timing belt you may encounter during inspection and the possible causes.
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Note
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Failure to follow the described timing belt inspection and maintenance may result in a broken timing belt and cause severe engine damage.
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Tooth is broken and/or tooth root is cracked
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Damaged camshaft/crankshaft oil seal and/or coolant leak
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Tensioner not functioning properly
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Back surface of the belt is cracked/worn/scratched/scored
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Interference with the belt cover
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Side of belt surface is worn
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Improper installation of the belt
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Overload or misalignment of the cam drive components
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Heavy thrust loading against the idler guide flanges
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Teeth are worn
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Poor belt cover sealing
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Rough and/or scored cam sprockets
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Clean break across fibers
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Kinked belt before and/or during assembly
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Foreign material under the belt
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Oil/Coolant impregnated and/or swollen belt
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Poor belt cover sealing
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