Page 113 of GM Goodwrench Engines Catalog by GM Goodwrench

GOODWRENCH SERVICE REPLACEMENT ENGINES Section V Page 112 August 2004 12518296 305 CID New 5.0L 1988-92 Chevrolet, Pontiac F (L03)(5.0H) 1989-93 Chevrolet B (L03)(5.0H) 1989-92 Buick B (L03)(5.0H) 1991-92 Oldsmobile B (L03)(5.0H) 1991-92 Cadillac D (L03)(5.0H) Engine-Specific Content: Front Cover, Oil Fill Cap, Oil Pan, and Valve Rocker Cover INSTALLATION INSTRUCTIONS This engine is built with 1993 production components. When servicing engine, use 1993 service parts. For "D" and "F" car applications, remove oil pan and replace with pan from replaced engine or order oil pan kit, part number 12518044. For applications without oil level sensors, plug hole using plug, part number 3448834, and T/W thread sealer, part number 12345493. Engine built after 04/13/94 have roller timing chains. For second service, sprocket part numbers 12552129 and 14088784, chain part number 14088783 and bolt part number 9417950 must be used. Engines built with link timing chain must use camshaft sprocket part number 10168441, crankshaft sprocket part number 10128346, chain part number 10128485 and bolt part number 3874878. This engine is built to production point of build torque specifications, and loss of some bolt torque is normal. It is not necessary to retorque any bolts. 12518298 305 CID New 5.0L 1987-95 Chevrolet, GMC G1,2 (L03)(5.0H) 1987 Chevrolet, GMC R1,2 V1 (L03)(5.0H) 1988-95 Chevrolet, GMC CK1,2 (L03)(5.0H) Engine-Specific Content: Front Cover, Oil Fill Cap, Oil Pan, and Valve Rocker Cover Replaces: 10181385 Replaced By: INSTALLATION INSTRUCTIONS This engine is built with 1993 production components. When servicing engine, use 1993 service parts. Install clutch pilot bearing, part number 03752487, for manual transmission applications. This engine is built with cylinder heads that have counter-bored inlet manifold attaching end holes (for piloted inlet manifold side gaskets) that require 1/4" longer fasteners. On 1987-90 models, the following parts are required: R.H. Front 09439918* R.H. Rear 15538420* L.H. Front 10108663 L.H. Rear 09439918* *Use sealer part number 1052080. Use inlet manifold gasket kit part number 12506365. On 1987 RV10 R20 models: Remove and discard front cover. Install front cover from original engine or obtain front cover assembly part number 10089669. Install torsional damper from original engine or obtain torsional damper part number 10066046. This engine incorporates current valve rocker cover. It may be necessary to use covers from original engine. This engine is built to production point of build torque specifications, and loss of some bolt torque is normal. It is not necessary to retorque any bolts.

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