Page 118 of GM Goodwrench Engines Catalog by GM Goodwrench

GOODWRENCH SERVICE REPLACEMENT ENGINES Section V Page 117 August 2004 12520270 350 CID New 5.7L 1987-94 Chevrolet, GMC G3 (L05)(5.7K) Emis. Sys (above 8500lb. GVW) NA4 1987-90 Chevrolet, GMC P2,3 (L05)(5.7K) Emis. Sys (above 8500lb. GVW) NA4 1987-91 Chevrolet, GMC RV2,3 (L05)(5.7K) Emis. Sys (above 8500lb. GVW) NA4 1988-95 Chevrolet, GMC CK2,3 (L05)(5.7K) Emis. Sys (above 8500lb. GVW) NA4 1991-96 Chevrolet, GMC P3 (L05)(5.7K) 1994-96 Chevrolet, GMC G3 (L05)(5.7K) MT1 (exc. KL5, 5Z1, 9C2, NM8) 1994-96 Chevrolet, GMC G3 (L05)(5.7K) NM8, MT1 (exc. 9C2) 1994-96 Chevrolet, GMC G3 (L05)(5.7K) 5Z1 (exc. 9C2, NM8) 1995 Chevrolet, GMC G3 (L05)(5.7K) MT1, 9C2, 5Z1 (exc. NM8) Engine-Specific Content: Front Cover, Oil Pan, Torsional Damper, and Valve Rocker Cover Replaces: 12509657 Replaced By: INSTALLATION INSTRUCTIONS Part number 12520270 5.7 Goodwrench 5.7 Liter engine is built with 1993 model year designed oil pan (no rail bead), oil pan gasket, and oil pump assembly. When servicing this engine, it is required that replacement parts be of the same type and design. This engine is built with current-production valve rocker covers. It may be necessary to use cover from replaced engine. On models with a 5-Quart Oil Pan, remove oil pan and oil pump assembly. Replace with original or new oil pan assembly part number 12518043, oil pump assembly part number 10168529, and screen oil part number 10166159. This engine is built to production point of build torque specifications, and loss of some torque is normal. It is not necessary to retorque any bolts. 12530282 350 CID New 5.7L 1999-2000 Chevrolet, GMC CK1 (L31) M30 (exc. NM8) 1996-98 Chevrolet, GMC CK1,2 (L31)(5.7R) M50, M30 (exc. NM8) 1996-2002 Chevrolet, GMC G1,2 (L31)(5.7R) M30 Engine-Specific Content: Crankshaft Hub, Front Cover, Oil Pan, and Valve Rocker Cover Notes: For 2001 G-van application, service engine block contains English threads. May require Valve Covers to be transferred from original engine for some applications INSTALLATION INSTRUCTIONS No special installation instructions are necessary. Please refer to the general installation procedure section of this book. 12530283 350 CID New 5.7L 1996-2000 Chevrolet, GMC CK2,3 (L31) MT1 (exc. NM8, KL5) 1996-2000 Chevrolet, GMC CK2,3 (L31)(5.7R) MW3 (exc. NM8) 1996-2002 Chevrolet, GMC G2,3 (L31)(5.7R) MT1 1996-99 Chevrolet, GMC P3 (L31)(5.7R) MW3, MT1 (exc. NM8, KL5) Engine-Specific Content: Crankshaft Hub, Front Cover, Oil Pan, and Valve Rocker Covers Notes: For 2001 G-van applications, service engine block contains English threads. When used for 2001 and 2002 vehicles, must also use 2000 MY Starter/Trans/Eng mounting bolts. INSTALLATION INSTRUCTIONS No special installation instructions are necessary. Please refer to the general installation procedure section of this book.

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