Timing Belt: Inspection: Auto-TENSIONER

WARNING: This page is about a different car, the 2003 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

Check for oil leaks. If oil leaks are evident, replace the auto-tensioner.
Check the rod end for wear or damage and replace the auto-tensioner if necessary.
Measure the rod protrusion. If it is out of specification, replace the auto tensioner.
1. Standard value: 12 mm (0.5 inch)
  
  Fig 1: Measuring Rod Protrusion
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Press the rod with a force of 98 to 196 N (22 to 44 pound) and measure the movement of the rod.
If the measured value is out of the standard value, replace the auto-tensioner.
1. Standard value: 1.0 mm (0.03 inch) or less
  
  Fig 2: Measuring Movement Of Rod
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.