00-06-01-026E Intake Manifold Inspection Replacement After Severe Internal Engine Damage - (Nov 11 2013) Intake and Forced Induction Intake Manifold
|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 CorporateBulletin Number 00-06-01-026D.When replacing an engine due to internal damage, extreme care should be taken whentransferring 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 internalengine 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 headsare still present and not bent. Usually when the valve heads are missing or sufficientlybent, internal engine component debris will be present to varying degrees in the intakeport of the cylinder head. If this debris is present in any of the cylinderhead intake ports, the intake manifold should be replaced.This replacement is required due to the complex inlet runner and plenum configurationof most of the intake manifolds, making thorough and complete component cleaning difficultand nearly impossible to verify the complete removal of debris. Reinstallation ofan intake manifold removed from an engine with deposits of internal engine componentdebris may result in the ingestion of any remaining debris into the new Genuine GMPartservice engine. This will cause damage or potential failure of the new Genuine GMPart service engine long block.
GM bulletins are intended for use by professional technicians,NOT a "do-it-yourselfer". They are written to inform thesetechnicians of conditions that may occur on some vehicles, or toprovide information that could assist in the proper service of avehicle. Properly trained technicians have the equipment,tools, safety instructions, and know-how to do a job properly andsafely. If a condition is described, DO NOT assume that thebulletin applies to your vehicle, or that your vehicle will havethat condition. See your GM dealer for information on whetheryour vehicle may benefit from the information.
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