Impala V6-3.9L (2007)
Piston Ring: Specifications
Piston Ring End Gap
First Compression Ring ....................................................................................................................................................... 0.15-0.30 mm 0.006-0.011 in
Second Compression Ring ................................................................................................................................................... 0.25-0.45 mm 0.009-0.017 in
Oil Control Ring .................................................................................................................................................................... 0.15-0.65 mm 0.06-0.025 in
Piston Ring to Groove Clearance
First Compression Ring ..................................................................................................................................................... 0.03-0.065 mm 0.001-0.002 in
Second Compression Ring ............................................................................................................................................... 0.02-0.055 mm 0.0007-0.002 in
Oil Control Ring ..................................................................................................................................................................................... 0.01 mm 0.004 in
Piston Ring Thickness
First Compression Ring ................................................................................................................................................... 1.175-1.190 mm 0.046-0.047 in
Second Compression Ring ......................................................................................................................................................... 1.475-1.490 mm 0.058 in
Oil Control Ring - Maximum ................................................................................................................................................................. 2.50 mm 0.098 in