00-06-01-026E

File in Section:
Bulletin No.:
Service Bulletin
Date:
06 - Engine
00-06-01-026E
November, 2013
INFORMATION
Subject:
Intake Manifold Inspection/Replacement After Severe Internal Engine Damage
Models:
2014 and Prior GM Cars and Trucks
This bulletin has been revised to add the 2014 model year. Please discard
Corporate Bulletin Number 00-06-01-026D.
•
•
When replacing an engine due to internal damage,
extreme care should be taken when transferring
the intake manifold to the new Genuine GM Part
service engine long block. The internal engine
damage may have resulted in the potential
discharge of internal engine component debris
into the intake manifold via broken pistons and/or
bent, broken, or missing intake valves.
After removing the intake manifold from the
engine, the technician MUST carefully inspect all
of the cylinder head intake ports to see if the valve
heads are still present and not bent. Usually when
the valve heads are missing or sufficiently bent,
internal engine component debris will be present
to varying degrees in the intake port of the cylinder
head. If this debris is present in any of the cylinder
head intake ports, the intake manifold should be
replaced.
•
This replacement is required due to the complex
inlet runner and plenum configuration of most of
the intake manifolds, making thorough and
complete component cleaning difficult and nearly
impossible to verify the complete removal of
debris. Reinstallation of an intake manifold
removed from an engine with deposits of internal
engine component debris may result in the
ingestion of any remaining debris into the new
Genuine GM Part service engine. This will cause
damage or potential failure of the new Genuine
GM Part service engine long block.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a
job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your
vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the
information.
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