Pinpoint Test C: Diagonal Wear
WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
This pinpoint test is intended to diagnose the following:
- Incorrect wheel and tire rotation
- Excessive toe in/out
- Incorrect tire inflation
- Loose, worn or damaged suspension components
PINPOINT TEST C: DIAGONAL WEAR
- C1 MEASURE THE TREAD DEPTH
- Using a tread depth gauge or similar tool, measure the tread depth of the wear pattern.
- Is the tread depth greater than 1.58 mm (0.062 in)?
- YES : If no performance concerns (noise/vibration) are present, the tire can remain in service. CHECK the air pressure in the tires, ADJUST as necessary. ROTATE the wheel and tire assemblies. INSPECT for loose, worn or damaged suspension components. INSTALL new components as necessary. CHECK the alignment and ADJUST as necessary. REFER to SUSPENSION SYSTEM - GENERAL INFORMATION article.
- NO : INSTALL a new tire(s). CHECK the air pressure in the tires, ADJUST as necessary. ROTATE the wheel and tire assemblies. INSPECT for loose, worn or damaged suspension components. INSTALL new components as necessary. CHECK the alignment and ADJUST as necessary. REFER to SUSPENSION SYSTEM - GENERAL INFORMATION article.