Buick35 Posted July 30, 2022 Share Posted July 30, 2022 I had a rebuilt water pump that I installed on my 35 Buick less than a year ago. Last week I noticed a whitish powdery substance around the outside of the rear round plate gasket area that to me looks like corrosion.Kinda like what appears on battery terminals.I sent my old pump out to get rebuilt,it should be back soon.I was running straight water with a rust preventative but I think I'll go to anti freeze. Any thoughts on this or what it could cause it? Thanks,I could try to send pictures later. Link to comment Share on other sites More sharing options...
Mark Shaw Posted July 30, 2022 Share Posted July 30, 2022 If the pump is aluminum or pot metal, it is most probably catodic corrosion. You may need to introduce a zinc sacrifical anode to manage the problem. Cathodic corrosion is an electrochemical process where two metals are placed in an electrolyte and one of the metals corrodes. Corrosion continues as long as the electric contact is maintained, since the electrons continue to flow to the cathode. The Basics of Cathodic Protection (corrosionpedia.com) Link to comment Share on other sites More sharing options...
Buick35 Posted July 30, 2022 Author Share Posted July 30, 2022 Thanks,I might do that.Now where to buy one. Link to comment Share on other sites More sharing options...
Mark Shaw Posted July 30, 2022 Share Posted July 30, 2022 16 minutes ago, Buick35 said: Thanks,I might do that.Now where to buy one. Cut down an RV water heater anode to fit in the radiator top tank and use commercial antifreeze. Link to comment Share on other sites More sharing options...
DonMicheletti Posted July 30, 2022 Share Posted July 30, 2022 The pump should be made of all cast iron - no aluminum Link to comment Share on other sites More sharing options...
Buick35 Posted July 30, 2022 Author Share Posted July 30, 2022 I just checked the pump that I pulled off and the round back plate cover is aluminum,at least magnet won t stick to it.Now I know. I wonder if I should send it back. Link to comment Share on other sites More sharing options...
Oldtech Posted July 31, 2022 Share Posted July 31, 2022 10 hours ago, Buick35 said: I just checked the pump that I pulled off and the round back plate cover is aluminum,at least magnet won t stick to it.Now I know. I wonder if I should send it back. Stainless maybe? Link to comment Share on other sites More sharing options...
Bloo Posted July 31, 2022 Share Posted July 31, 2022 Stainless would be nice. Unlikely I think, but nice. 1 Link to comment Share on other sites More sharing options...
DonMicheletti Posted July 31, 2022 Share Posted July 31, 2022 Interesting. I have had '10, '18. '31, '32 and '38 Buicks. All had all ferrous water pumps. No aluminum. You learn something every day. Brass is another good substitute if you paint the pump. Link to comment Share on other sites More sharing options...
bob staehle Posted July 31, 2022 Share Posted July 31, 2022 On 7/30/2022 at 11:05 AM, Mark Shaw said: Cut down an RV water heater anode to fit in the radiator top tank and use commercial antifreeze. Mark Snyder's sells an anode they call a head saver # A-6010-ahs Bob 1 Link to comment Share on other sites More sharing options...
Buick35 Posted July 31, 2022 Author Share Posted July 31, 2022 Thanks but I already ordered one. Link to comment Share on other sites More sharing options...
Buick35 Posted August 1, 2022 Author Share Posted August 1, 2022 On 7/31/2022 at 11:27 AM, DonMicheletti said: Interesting. I have had '10, '18. '31, '32 and '38 Buicks. All had all ferrous water pumps. No aluminum. You learn something every day. Brass is another good substitute if you paint the pump. Here's a picture of my corroded one.I can buy a ferrous backing plate for it I think.Greg Link to comment Share on other sites More sharing options...
Buick35 Posted August 1, 2022 Author Share Posted August 1, 2022 On 7/31/2022 at 5:46 PM, Buick35 said: Thanks but I already ordered one. I installed a zinc anode today.It's a metal plate that I fit inside the bottom of the thermostat housing.I think that should work. Link to comment Share on other sites More sharing options...
EmTee Posted August 3, 2022 Share Posted August 3, 2022 On 8/1/2022 at 6:27 PM, Buick35 said: It's a metal plate that I fit inside the bottom of the thermostat housing. Any picturres? Link to comment Share on other sites More sharing options...
Buick35 Posted August 3, 2022 Author Share Posted August 3, 2022 I'll try to send one later.Thanks 1 Link to comment Share on other sites More sharing options...
Buick35 Posted August 4, 2022 Author Share Posted August 4, 2022 Here's a couple of pictures,I'm still fighting a leak but I'm having on it,I think. Link to comment Share on other sites More sharing options...
Buick35 Posted August 4, 2022 Author Share Posted August 4, 2022 Another picture,sorry us not sending. Link to comment Share on other sites More sharing options...
Buick35 Posted August 4, 2022 Author Share Posted August 4, 2022 On 8/1/2022 at 6:02 PM, Buick35 said: Here's a picture of my corroded one.I can buy a ferrous backing plate for it I think.Greg H ordered a steel backing plate from Bobs Link to comment Share on other sites More sharing options...
Buick35 Posted August 5, 2022 Author Share Posted August 5, 2022 On 7/30/2022 at 1:05 PM, Buick35 said: I just checked the pump that I pulled off and the round back plate cover is aluminum,at least magnet won t stick to it.Now I know. I wonder if I should send it back. I called Bob's and they told me that's the way it comes from the manufacturer and they couldn't do anything about,besides they only have a two year guarantee on them.I did order another plate. Link to comment Share on other sites More sharing options...
Buick35 Posted August 8, 2022 Author Share Posted August 8, 2022 On 8/5/2022 at 9:35 AM, Buick35 said: I called Bob's and they told me that's the way it comes from the manufacturer and they couldn't do anything about,besides they only have a two year guarantee on them.I did order another plate. I got another plate from Bob's today and it's steel. 1 Link to comment Share on other sites More sharing options...
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