Chevrolet Performance ZZ427 Mode D'emploi

ZZ427/480 (19166393) Deluxe Specifications
Specifications Part Number 19211813
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This publication provides general information on components and procedures that may be useful when installing
or servicing a ZZ427/480 engine assembly. Please read this entire publication before starting work. Also, please
verify that all of the components listed in the Package Contents section below were in fact shipped in the kit.
The information below is divided into the following sections: Package contents, torque information, ZZ427/480
engine assembly specifications, and engine start up procedures, component information and a service parts list.
The ZZ427/480 engine assembly incorporates modern technology in a package that can be installed in
applications where 366cid and up Big Block Chevrolet (BBC) V-8s were originally used. This engine is assembled
using brand new, premium quality components. Due to the wide variety of applications in which a ZZ427/480
engine assembly can be used, some procedures and recommendations may not apply to specific applications.
The ZZ427/480 engine assembly in an all new Gen VI iron cylinder block manufactured on new production tooling;
consequently you may encounter dissimilarities between the ZZ427/480 engine assembly and previous versions
of the BBC V-8. The ZZ427/480 engine is internally balanced and only should be used with an internally balanced
flywheel, flexplate, and harmonic damper. In general, items such as motor mounts, bell housing, starters, etc.
can be transferred to this ZZ427/480 engine assembly when it is installed in a vehicle originally equipped with a
BBC V-8 engine. When installing a ZZ427/480 engine assembly in a vehicle not originally equipped with a BBC
V-8 it may be necessary to adapt or fabricate various components for the cooling, fuel, electrical, accessory drive
system and exhaust systems.
Chevrolet recommends that you use a minimum octane rating of 92 (R+M/2) fuel in the ZZ427/480 (10:1
compression ratio) to prevent pre-ignition and detonation.
Observe all safety precautions and warnings in the service manuals when installing a ZZ427/480 engine assembly
in any vehicle. Wear eye protection and appropriate protective clothing. Support the vehicle securely with jack
stands when working under or around it. Use only the proper tools. Exercise extreme caution when working with
flammable, corrosive, and hazardous liquids and materials. Some procedures require special equipment and
skills. If you do not have the appropriate training, expertise, and tools to perform any part of this conversion safely,
this work should be done by a professional.
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ZZ427/480 (19166393) Deluxe Specifications REV 15JA15
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