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#1
10-01-2019, 07:06 PM
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Is this a correct waterpump for my 72 formula
Looking to buy a waterpump casting number 482138 I have a 400 engine
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#2
10-01-2019, 07:21 PM
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My 72 Formula has that cast number on the water pump too.
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Mike/Illinois |
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#3
10-01-2019, 07:38 PM
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https://www.ebay.com/itm/1972-1971-P...oAAOSweEFbLB3u
https://www.ebay.com/itm/Pontiac-Wat...UAAOSwFANc22lj
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1976 LeMans B09 Freeway Enforcer, 455/M40 Smokey 1977 Trans Am, 400/M21 Black/Gold Bandit. 44K actual miles 2017 Sierra SLT 1500 Z71 4X4  2019 Canyon SLT Crew 4X4  
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#4
10-01-2019, 07:49 PM
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depends on the build date, here is a good post from the past with a very knowledgable source in Ol Pinion Head(Roger) :
http://forums.maxperformanceinc.com/...d.php?t=830803
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'72 Formula 455HO TH400, Revere Silver, black deluxe '74 Trans Am SD 4 speed, Admiralty Blue, blue deluxe |
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#5
10-01-2019, 08:00 PM
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Quote:
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#6
10-01-2019, 08:04 PM
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Feel free post a pic of the date. I stand by earlier posts, have pulled too many "138"s over the years.
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Buzzards gotta eat... same as worms. |
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#7
10-02-2019, 01:07 PM
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isn't that the casting number used from 1971 through to the end of Pontiac V8 production?
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
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#8
10-02-2019, 07:09 PM
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Quote:
More from the above link: "488296 continued on throughout the '70's... basically it is the most common "tall" w/p casting. The font & style of casting numbers got much bigger as the '70's rolled along. Even original Pontiac 301 & 265 waterpumps were built from this casting, be it with a different design low drag cast impeller. Often the impellers have been changed at rebuilders, so don't count today, on a very late dated one to have it's original low drag cast impeller." Should have also noted earlier that sometime in '79, Pontiac Central Foundary went away from using Alpha Numeric date coding on the "296" water pumps & went to a Julian date code, this was for '80 & 81 model 301's & 265's as well as over the counter Service Parts water pumps.
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Buzzards gotta eat... same as worms. |
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#9
10-02-2019, 07:34 PM
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Tall 488296 casting numbers and the small 72 cast on a K191 pump (November 19, 1971). That's from an original 72 cars with a November 26 production date.
I need to look at my 72 GTO (Oct 26th) and see what pump I have on that car I always thought the 488296 pump with the 72 casting are the correct one for 72 cars.   
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