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PISTON RING SPECIFICATION CHART Ring Position Groove Clearance Maximum Clearance Upper Ring .051-.094 mm 0.11 mm (0.0020-.0037 in.) (0.004 in.) Intermediate Ring 0.04-0.08 mm 0.10 mm (0.0016-0.0031 in.) (0.004 in.) Oil Control Ring .019-.229 mm .25 mm (Steel Rails) (.0007-.0090 in.) (0.010 in.) Ring Position Ring Gap Wear Limit Upper Ring 0.20-0.36 mm 0.43 mm (0.0079-0.0142 in.) (0.0017 in.) Intermediate Ring 0.37-0.63 mm 0.74 mm (0.0146-0.0249 in.) (0.029 in.) Oil Control Ring 0.025-0.76 mm 1.55 mm (Steel Rail) (0.0099- 0.03 in.) (0.061 in.) 7. The No. 1 and No. 2 piston rings have a different cross section. Ensure No. 2 ring is installed with NOTE: Piston rings are installed in the following • Oil ring expander. • Upper oil ring side rail. • Lower oil ring side rail. • No. 2 Intermediate piston ring. • No. 1 Upper piston ring. 8. Install the oil ring expander. 9. Install upper side rail (1) by placing one end between the piston ring groove and the expander 10. Install No. 2 intermediate piston ring using a pis- ton ring installer. 9 - 1384 ENGINE - 4.7L SERVICE INFORMATION WK |