Crown Victoria V8-4.6L CNG SOHC VIN 9 (1999)
Piston Ring: Specifications
Piston Ring To Groove Clearance
Refer To Note
On 10:1 Engines: Upper Compression Ring 0.030-0.070mm.
Lower Compression Ring 0.020-0.060mm. On 9:1 Engines: Upper
Compression Rings 0.020-0.060mm. Lower Compression Ring
0.020-0.060mm.
Piston Rings-Ring Gap-Compression (Top)
0.13-0.028 mm
Piston Rings-Ring Gap-Compression (Top)
0.15-0.30 mm
Ring Gap - Oil Ring (Steel Rail)
0.15-0.65 mm
Oil Ring-Side Clearance
0.027-0.196 mm
Piston Ring-Ring Gap-Compression-(Bottom) 0.30-0.55 mm
