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1964 Oldsmobile 98 - water pump removal on a 394


minmar96

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Does anyone know the trick to removing the bottom bolt on the water pump? Do you need to remove the main pulley? It seems like I need to but I do not want too if I do not need to. If I have to remove it is the pulley "keyed" so it can only go on one way? Or do I need to mark it so it is put on in the same location? Any help would be greatly appreciated.

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There's a rounded notch in the balancer/crank pulley to allow removal of this bolt. Rotate the crank until the notch is at the top and aligned with the w/p bolt, then use a thin-walled deep socket to remove the bolt. I've found that a 1/4" drive socket works better.

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Yes- the balancer/pulley is keyed to go on only one way. You should NOT have to remove the balancer to r&r the water pump. Use the 1/4" drive deep socket. It will go in there. Done it many times.

Just a thought- does car have aftermarket a/c? It would have an extra pulley bolted to the front of the balancer which would probably have to be removed.

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