Engine - Exchange Program: Overview
File In Section: 6 - EngineBulletin No.: 77-61-05
Date: February, 1997
INFORMATION
Subject:
Engine Exchange Program for 5.7L LS1 GEN III V8
Model:
1997 Chevrolet Corvette
with 5.7L V8 Engine (VIN G - RPO LS1)
This bulletin covers an engine exchange and part restriction program for the 1997 5.7L LS1, GEN III V8 engine. The engine exchange and part restriction program is in effect until June 30, 1997. Its purpose is to provide early product feedback and increase customer satisfaction.
All requirements regarding serviceability and non-serviceable items, warranty claims, processing procedures and shipping instructions are explained in this bulletin. Your cooperation in following these procedures will greatly improve the effectiveness of this program.
New Features of the 5.7L LS1 GEN III V-8:
^ Composite Intake Manifold
^ Dual Wall Exhaust Manifolds
^ Equally Spaced Intake and Exhaust Ports
^ 1.70:1 Ratio Roller Rockers
^ Covered Valley
^ Extended Sump Structured Oil Pan
^ GeRotor Oil Pump
^ Electronic Throttle Control (ETC)
^ Six Bolt Main Caps
^ Coil Near Plug Ignition (Installed on Rocker Covers)
^ Deep Skirt Aluminum Block
^ Distributorless Ignition System (Cam and Crank sensor)
^ 24x Reluctor Ring
^ Knock Sensors Mounted in Engine Valley
^ All Metric Fasteners
^ If any internal components require replacement, or there are any major engine leaks (oil or coolant), the engine must be exchanged.
Engine Components which may be Serviced (without exchange): See * for restricted parts.
Important:
These components are under a parts restriction. These parts are new for 1997 and a part restriction program was set up to gain engineering feedback. For service procedures of these components contact the Corvette Launch Center (1-800-498-5148). Canadian dealers should contact TAC at 1-800-263-7740.
Procedures for these service operations are in the 1997 Corvette Service Manual. Upon completion of your diagnosis, all parts must be reinstalled.