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Due to changes to the head gasket for the 2007i Duramax Program, the customer has requested changes to the block casting to improve sealing. Timing of this is critical as castings will be required before the end of 2006 C.Y. In order to assist the Duramax team in meeting this timing, we need to begin the design process at this time. As per the attached email file and associated pictures, modify the lifter core and slab core product models as "temporary" changes using the "save as" technique, in order to make the change in one set of tooling for sampling purposes. Once the design is officially approved, the changes will be made permanent under another WR. In summary, the changes amount to the following: Location Stock addition to casting proposal 1) Stock addition to inboard lifter cavity wall .79 mm 2) Lifter cavity head bolt boss radius 1.0 mm 3) Oil drain back holes 2.0 mm (1 mm per side)

File Attachments:

	File Name	Description	User Name	Upload Date
Delete	Stumboproposalemail.rtf	Email in .rtf format	Singer, James (fzfssg)	10/10/2006 3:29:54 PM
Delete	SealLandAnalysis.xls	email attachement	Singer, James (fzfssg)	10/10/2006 3:30:14 PM
Delete	97377916.geo_fin001.003999.gif	email attachment	Singer, James (fzfssg)	10/10/2006 3:30:31 PM
Delete	97377917-deck.gif	email attachment	Singer, James (fzfssg)	10/10/2006 3:30:46 PM
Delete	97377917-iso1.gif	email attachment	Singer, James (fzfssg)	10/10/2006 3:31:03 PM
Delete	97377917-iso2.gif	email attachment	Singer, James (fzfssg)	10/10/2006 3:31:13 PM
Delete	97377917-sect.gif	email attachment	Singer, James (fzfssg)	10/10/2006 3:31:23 PM
Delete	DMAXlifterroughboremachiningOp359-30-06.ppt	email attachment	Singer, James (fzfssg)	10/10/2006 3:32:02 PM

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Primary Part Information:   Select*

Program	Part Type	Part #	Design Phase	Location	PTE	Status
Duramax V8	Block	97377917P	Prod	Defiance	Singer, James	Complete - Approved

Impacted Part Information:

Program	Part Type	Part #	Design Phase	Location	PTE	Status
Duramax V8	Block	97377915A	Prod	Defiance	Singer, James	Waived
Duramax V8	Block	97377916M	Prod	Defiance	Singer, James	Complete - Approved

Location Information:

Location	TM	Approval Date	Priority	Status
Defiance	Meyer, Maurice	10/10/2006 3:50:38 PM	Urgent	Approved