T1N Idler Pulley Washer

This washer goes behind the idler pulley located right in front of the oil filter housing.

It acts as a spacer to ensure the pulley is in proper alignment with the rest of the pulleys in the serpentine belt system.

These can easily get lost when replacing this pulley. Failure to use this washer / spacer when installing the upper pulley will result in damage to your oil filter housing and could cause catastrophic engine failure.