Alright, here is my dilemma. I have now bought 2 different water pumps and both have the same problem. My motor is a 69 400 that was orignally equipped witht the short style water pump (4" hub). Both of the pumps I have bought, a flowcooler and a stock replacement, are both the long style pump (4.5" hub) which cause the pulleys to not align because the waterpump pulley is a half inch too far out. I thought when I returned the performance pump and bought the stock style that I would fix this problem. How should I fix this problem. Should I find a longer crankshaft pulley or machine a spacer? Please help, and sorry for the length.
I had the same issue on my 69, but I believe it was the reverse situation.
From what I remember, '69 was the big crossover year for water pumps. Not only did they move from 8 bolt to 11 bolt, but they also changed lengths on the shafts.
I went back to O'Reilly Auto Parts where I bought the original replacement water pump and I had them look it up in the system again.
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I just went to O'Reillys website and looked up a 69 Firebird.
A1 Remanufactured Water Pump
Part # Price Desc ------ ------ -------------------- 58-302 $24.99 with 3 31/32" HUB HT 58-303 $19.99 with 4 15/32" HUB HT
Thanks for the help. I have a friend who can CNC mill me a spacer out of billet to solve the problem. Would this be an ok fix to the problem? I dont really want to return this pump I already have all the way to CA.
You are better off with the right pump. You will have to make at least two spacers: One for the balancer, and one under the bracket that bolts to the head for the PS pump and the alternator. You will also have to buy bolts that are 1/2" longer, and on the balancer that could make for some unwanted flexing and vibration.
9799130 XJ, 3995646 AH, 3927796 AE 1970 these pullies would work for your setup. I have been down this road. Do a ebay seach for pontiac pullies you might get lucky. I bought a few extra so I could run a 11 bolt long pump and keep the other brackets the same.
I have a few extra pulleys.I'll take a look and let you know if any of them match Rohrt's part numbers.
David
http://FirstGenFirebird.org/show/closeup.mv?CarID=571 If i don't get this car back on the road soon i'm gonna go postal! On a quest for FGF knowledge 1968 Pontiac Firebird Convertible 1969 Oldsmobile Cutlass "S" Convertible *Sold*