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post #1 of 16 (permalink) Old 04-03-2017, 08:46 AM Thread Starter
 
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69 GTO Water Pump

Hello I am struggling to find a water pump for my 69 GTO 400 V8. It is a early production so it has a 4" hub height. I come to find out that this pump is now a obsolescent part. I called Ames Perf. and they may have a option buy the end of April. I am hoping maybe one of my GTO brothers may know a option I can explore, as I don't want to wait that long. Thanks
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post #2 of 16 (permalink) Old 04-03-2017, 12:55 PM
 
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Does your '69 have it's original casting WP? does it still have its cast impeller? If the casting is not heavily rust pocked, it can be properly rebuilt with correct cast impeller. have another run of WP rebuilds coming up. Am sorry, but dont stock generic replacement casting pumps.
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post #3 of 16 (permalink) Old 04-03-2017, 03:32 PM Thread Starter
 
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ID:	89025It does have cast impeller I know that. and It only has 30799 A - stamped in it.
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post #4 of 16 (permalink) Old 04-03-2017, 08:46 PM
 
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Okies69,

Pinion Head rebuilt my water pump and turned it around very quickly (he was ready to rebuild a batch), I too have a 4" hub. I would recommend him for your rebuild. Dan

*67K miles... Under Construction* :)
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post #5 of 16 (permalink) Old 04-04-2017, 07:56 AM
 
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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.
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post #6 of 16 (permalink) Old 04-04-2017, 08:22 AM Thread Starter
 
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thanks you for the info... I was incorrect after another look last night i found that it is NOT a cast impeller. So now don't even have a good core. Not sure what to do now. I had some one suggest converting to the "tall" pump buy changing all my acc. mounting and crank pully.
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post #7 of 16 (permalink) Old 04-04-2017, 08:53 AM
 
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Originally Posted by Okies69 View Post
thanks you for the info... I was incorrect after another look last night i found that it is NOT a cast impeller. So now don't even have a good core. Not sure what to do now. I had some one suggest converting to the "tall" pump buy changing all my acc. mounting and crank pully.
To convert to the "tall" 11 bolt wp, you will only need to convert to the correct wp pulley. Does your '69 engine have power steering? If so, it should have a "900" or "901" PS pump pulley. Those are last 3 digits of part number inscribed on the face of the PS pulley. If so, the engine will have an "846" crank pulley, or a stack of "842" & "843" crank pulleys (factory AC). If factory non AC with PS, with previous mentioned pulley numbers, will need a "127" wp pulley to go with "tall" 11 bolt wp.
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post #8 of 16 (permalink) Old 04-04-2017, 04:53 PM Thread Starter
 
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It does have factory AC and PS. I see there are two crank pullys one for AC and the other that aligns with water pump pully and powers ALT. and PS. If i switch crank pully to match the "tall "pump wont i need to change the mounting of the ALT. and PS pump. as the belt would be a half inch off
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post #9 of 16 (permalink) Old 04-05-2017, 08:26 AM
 
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Originally Posted by Okies69 View Post
It does have factory AC and PS. I see there are two crank pullys one for AC and the other that aligns with water pump pully and powers ALT. and PS. If i switch crank pully to match the "tall "pump wont i need to change the mounting of the ALT. and PS pump. as the belt would be a half inch off]
To go to the "tall" 11 bolt water pump with '69 accessories, the crank pulley(s) doesn't change, just the water pump pulley & pump. To go with "tall" 11 bolt pump, you will need a "128" or "130" water pump pulley. neither are reproduced. Both are smaller diameter, designed for AC applications, just have a different stagger than the original '69 model "062" short 11 bolt wp pulley.
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post #10 of 16 (permalink) Old 07-02-2018, 08:45 PM
 
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I have the same problem, changing to the 4.5 water with just a deeper pulley.
Butler quoted me about 120 for the pulley.
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