dhaven64 Posted September 9, 2014 Share Posted September 9, 2014 Hey guys. I removed the fuel pump from my 64 Riv with the numbers 47...stamped on the mounting flange (couldn't make out the other digits but assuming it's 4706) My question is regarding a small odd shaped hole on the underside casting between 2 screws. Is it normal or do I need a new fuel pump? I would like to rebuild this one if possible. Any help would be greatly appreciated. Link to comment Share on other sites More sharing options...
Seafoam65 Posted September 9, 2014 Share Posted September 9, 2014 Hey guys. I removed the fuel pump from my 64 Riv with the numbers 47...stamped on the mounting flange (couldn't make out the other digits but assuming it's 4706) My question is regarding a small odd shaped hole on the underside casting between 2 screws. Is it normal or do I need a new fuel pump? I would like to rebuild this one if possible. Any help would be greatly appreciated. Most fuel pumps have a hole in the casting on the bottom so that if the diaphragm fails, thegasoline has a place to leak out on the ground rather than be forced to leak into the timing cover and fill the engine oil with gasoline. This is probably the hole you are seeing. Water pumps have the samehole, called a weep hole that allows a pump that has failed to leak coolant on the ground rather than forcing it through the water pump bearing which could lead to total failure and the pump hub flyingoff causing damage to other underhood components. Link to comment Share on other sites More sharing options...
dhaven64 Posted September 9, 2014 Author Share Posted September 9, 2014 Thanks so much for that info! Makes perfect senseI'm going to rebuild it then. Link to comment Share on other sites More sharing options...
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