Town Car V8-4.6L VIN W (1997)
Piston Ring: Service and Repair
NOTE:
1. Always use a piston ring expanding tool to install rings on a piston.
2. If installing new rings in a used cylinder that has not been refinished, remove the cylinder wall glaze using only spring-loaded Engine Cylinder
Hone Set T73L-6011-A. De-glaze only if there is no visible sign of cross-hatch markings on the cylinder wails.
3. After any refinishing operation, allow cylinder bore to cool. Make sure piston and bore are clean and dry before checking piston fit. Always clean
the cylinder bore thoroughly with detergent and water solution.
4. Piston rings should be staggered on the piston to make sure the piston ring end gaps are NOT aligned.
5. Replace all rings that are scored, broken, chipped or cracked. Check the end gap and side clearance.
CAUTION:
Piston rings should not be transferred from one piston to another, regardless of mileage or piston ring failure may occur.
PROCEDURE
1. Remove piston rings using a piston ring expander.
2. Clean and inspect piston.
3. Verify piston ring end gap and ring side clearance.
4. Install oil ring expander and two rails by hand. Position oil ring rail and expander gaps as shown.
5. Using a piston ring expander, install two compression rings as shown. Follow instructions on the piston ring package.
