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Discussion Starter #1
I have a 1999 F350 super duty 7.3L built in July 1998 (therefore called a 99, not a 99.5)

I need to replace the water pump along with the gasket,etc.
The ford garage says the P.N. is FOPW-455 for the pump, FORT-1201 for the gasket and FORG-602 for another gasket.

Ford 7.3L Powerstroke Diesel New OEM Water Pump F81Z8501FA

says the following:
99.5-2003 Ford 7.3L Powerstroke Diesel New OEM Water Pump from Ford Motor Company
[F81Z8501FA] $289.99

99-03 Ford 7.3L Powerstroke Diesel Water Pump
[MSF81Z8501FA] $269.00

I can find [F81Z8501FA] on internet, but not [MSF81Z8501FA] which would apply to my early 99 truck. Anybody can help?

TIA
 

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Wow, you can probably just get the part from any parts dealer like Advance or Autozone, they will look nit up by VIN.
 

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They are the same part numbers. The "MS" was added to the PN so that if you tried to search for a cheaper one you would always come back to PDP's website. Read the part number this way:
F= '90's vehicle
8= 199->8<- first year of use
1= International
Z= Ford Service Part

8501= water pump (anything between 8500-8600 denotes water pump)

FA= Design level. First design used would be a AA. The upgrade would be a BA, then a CA, and so on. The FA code supersedes the AA design so in actuality you should always be able to put a FA part on a AA motor but not the other way around.

Using Motorcraft numbers opens a whole new can of worms. Amazon sell a Gates 45000 water pump for your truck for $85. Search Amazon for my '97 water pump and it is the same thing BUT has a removable neck. Same part different revisions.

Clear as Mud? Cool.
 

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Discussion Starter #4 (Edited)
Mud as clear... or the other way around. Thank a whole lot! Would you believe 514$ in my home town in Québec, Canada! But the hourly rate is much cheaper.
 

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