Description
Function of the Timing Idler Pulley
The timing idler pulley guides the timing belt along its correct path around the crankshaft and camshaft sprockets. It maintains proper belt alignment and helps distribute tension evenly. A seized or worn idler causes belt noise, uneven wear, and can lead to timing belt failure. Always replace idler pulleys during timing belt service, as bearing failure is a common cause of belt breakage.
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