Join Date: Jan 2015
Location: Injun Territory, 'Merica!
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the above pump is a parts store '69 replacement pump from the 70's/80's/90's.
Of note, since Ames cant get their listing right...
All original '69 Pontiac V8 water pumps were of the "short" 11 bolt design.
-Have documented multiple low mile late build '69 Pontiacs having their original date coded "short" style 11 bolt pumps.
-The first "tall" 11 bolt pump wasn't even cast till mid Summer of '69, & those first "124" casting pumps went on the first '70 model Pontiacs built in late August '69.
-Late production '69 Firebirds built up into Nov '69 continued to use the "short" 11 bolt pump. There were tight fan clearance issues on the Birds esp when the Pontiac 400 was specced with the 5 blade factory flex fan, this precluded the factory use of the 1/2" taller "124" casting pump.
-By mid '70, Pontiac dealership service departments began substituting the "124" casting "tall" water pumps along with corresponding water pump pulley when '69 Pontiac V8 A, B, G series needed water pumps replaced.
On generic casting Pontiac pumps, have disassembled a few, to see what was going on with back side of cast impeller. Most generic Pontiac pumps don't even have a cast impeller. For those that have had cast impellers, its been intersting to see what the aftermarket mfg used, as there were at least 5 specific impellers used in '63-81 original Pontiac water pumps. On the above aftermarket pump, can't guarantee the bearing insert is a std size, not something I would rebuild.
Last edited by Pinion head; 04-04-2017 at 08:39 AM.