Inspect Belt Tensioner

IMPORTANT: Inspect all belt tensioner and pulley systems in this manner.

NOTE: Belts are equipped with an automatic tensioner which does not require adjustment.

Pulley and spring tensioner is serviced as an assembly

With belt ON the drive, perform the following checks:

Check to see if tensioner arm (A) is against free arm stops (B). Replace belt if this condition is seen.

Check belt tracking mark on the pulley. Replace belt tensioner if tracking mark is considerably wider than belt.

With belt OFF the drive, perform the following checks:

NOTE: Do not pry between pulley and spring case.

Release tension on belt using a long-handle 1/2 in. drive tool. Remove belt from alternator pulley.

Release tension on tension arm (A)

Rotate tension arm (A) slowly using a 1/2 in. drive tool. Note arm should rotate smoothly between arm stops (B); if not, replace tensioner.

Replace tension mechanism if there is:

• Metal-to-metal contact is present between rotating and stationary parts at location (C and D) on tensioner.
• Cracks or broken spring case or stops.

Install belt tensioner with cap screw to engine front cover at mounting holes tighten to specification.

Specification

A-Tension Arm
B-Free Arm Stops
C-Metal-to-Metal Contact Between Arm and Spring Case
D-Metal-to-Metal Contact Between Arm and End Cap

RW29387,00006A7 -19-23SEP04-1/2

Specification

RW29387,00006A7 -19-23SEP04-2/2