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SERVICE SUPPLEMENT 6.0L CES Exhaust Manifold Visual Inspection 517386 - 525649

May, 2012 SUP2012-02S

The following information DOES NOT supercede SUP2012-02; instead provides an additional Visual Inspection to help determine if a manifold is suspect. Simply using a small mirror and flashlight (preferably a small LED), you can visually inspect inside the water outlet fittings of the manifolds. SUP2012-02 was recently issued to address a small number of exhaust manifolds that are suspect to a casting flaw. SUP2012-02 addresses an Exhaust Cooling System Validation Procedure that requires the engine to be run and a Diacom Recording sent to PCM. Before proceeding with the Validation Procedure, performing the following inspection may uncover a faulty manifold. With the hoses removed from the outlet fittings of the exhaust manifolds, inspect both the right and left side manifolds for casting problem. Left hand and Right hand manifolds are determined by viewing the engine from the rear (transmission end). Refer to illustrations below for good or bad casting identification. The Left hand manifold should represent a good manifold and should be used as a reference when evaluating the Right hand manifold. 1. Position the mirror and flashlight as shown, by the water outlet fitting of each manifold. 2. Position the flashlight to make sure that sufficient light is available within the manifold fitting. 3. Inspect inside the manifold water outlet fitting and refer to the illustrations shown below. NOTE: In some cases the inspection can be done without using the mirror. From the opposite side of the engine, you can look across the top of the intake manifold and into the water outlet fitting. Important: The “dotted” half moon area indicates the inspection area for evaluation.

GOOD Casting

BAD Casting LH

Although some flashing is present, this indicates cooling passage is clear and allows water to flow around entire manifold casting. Proceed with Validation Procedure.


Indicates cooling passage blockage allowing water to only flow around half the manifold casting. Call PCM for replacement manifold before running engine.

Published by Pleasurecraft Engine Group Training Services. Pleasurecraft’s policy of continued improvement creates dated information and necessitates changes in procedures, specifications and methods used in trouble shooting and repair. In the event you have any questions regarding any of our products, the most up to date information may be obtained by contacting our service department to insure that any published information in your possession has not been updated. The information in the publication is believed to be true and correct at the time of publication. This publication is for informational purposes only and does not constitute a guarantee or warranty or in any way change or modify the written warranty, which is attached to PCM Products at the time of sale. The knowledge of this publication, the information revealed herein and/or the possession of this publication grants no license or authority to anyone to perform any action or make any statement or commitment, beyond the specific instructions stated herein, in behalf of or in the name of Pleasurecraft Engine Group. It is the sole responsibility of those using the information contained herein, to follow industry standard and common sense safety procedures when using the information contained herein and those using the information contained herein agree to defend and hold Pleasurecraft Engine Group harmless in all cases where injury and/or damage may occur during the use and/or application of the information contained herein.