Piston - Ring-to-Groove Clearance

WARNING: This page is about a different car, the 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, 2004 Ford Excursion, and 2004 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

Inspect the piston for ring land damage or accelerated wear.

Fig 1: View Of Piston
Courtesy of FORD MOTOR CO.
Measure the piston ring-to-groove clearance.
- If out of specification, install new components as necessary.
  
  Fig 2: Measuring Piston Ring-To-Groove Clearance
  Courtesy of FORD MOTOR CO.