Tim Wolfe Posted September 15, 2017 Share Posted September 15, 2017 What hardness should the water pump shaft be for a 1930 Chrysler 218.6 cu. in. ? I paid a lot of money for a pump rebuild only to have the front bushing seize the shaft. Builder wouldn't honor the warranty, said there wasn't any lube in the water. The front bushing doesn't get close to the coolant! Broke the pump in half after driving 9 miles. I'll rebuild my own from now on. Link to comment Share on other sites More sharing options...
Spinneyhill Posted September 15, 2017 Share Posted September 15, 2017 I made mine (1930 Dodge 8) out of silver steel. I think you call it tool steel in North America. It machines alright and polishes nicely. Link to comment Share on other sites More sharing options...
robert b Posted September 15, 2017 Share Posted September 15, 2017 Did your rebulider use a sinted bronze bushing in the pump ?, if he used normal bronze bushing there will do lubrication of the bearing and over heating of the braring. Rhese pumps use sinted boshing that allow oil to lube the bearing. Link to comment Share on other sites More sharing options...
Spinneyhill Posted September 18, 2017 Share Posted September 18, 2017 On 9/16/2017 at 11:32 AM, robert b said: Did your rebulider use a sinted bronze bushing in the pump ?, if he used normal bronze bushing there will do lubrication of the bearing and over heating of the braring. Rhese pumps use sinted boshing that allow oil to lube the bearing. Yes I did. I replaced a brass bush with a hole in it. Water was coming out of the oil cup. It is an expensive exercise buying a sintered bush in this country. The original size, of course, is NLA. I had to buy one and turn it to size. It is a flanged bush. Link to comment Share on other sites More sharing options...
Tim Wolfe Posted October 24, 2017 Author Share Posted October 24, 2017 Made a couple shafts out of 0-1 tool steel, then sent them out to be hardened. Should work this time!! Link to comment Share on other sites More sharing options...
Spinneyhill Posted October 25, 2017 Share Posted October 25, 2017 Hmmm. I didn't think of hardening mine. I just fitted it when it was finished. Link to comment Share on other sites More sharing options...
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