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CT Jack · 05-25-2025, 08:15 AM

Do what Richard Knight recommends. Based on your measurement you need to remove a minimum of 1/16'" of the pump surface material within the nose area of the casting. I had to do this several times in the past. The first time it happened I took material off the ID of the fan casting. That was a bad idea, it destroyed the fan. Ford used many vendors to produce pump castings. It appears the external dimensions around the pump nose were not closely specified.
Remove the pump and grind or belt sand the nose area. Without the shaft key installed test fit the fan on the shaft for clearance. A clearance >1/16" should be achieved.

05-25-2025, 08:15 AM	#20
CT Jack Senior Member Join Date: May 2010 Location: Hebron, CT Posts: 537	Re: New aluminum fan blade problem Do what Richard Knight recommends. Based on your measurement you need to remove a minimum of 1/16'" of the pump surface material within the nose area of the casting. I had to do this several times in the past. The first time it happened I took material off the ID of the fan casting. That was a bad idea, it destroyed the fan. Ford used many vendors to produce pump castings. It appears the external dimensions around the pump nose were not closely specified. Remove the pump and grind or belt sand the nose area. Without the shaft key installed test fit the fan on the shaft for clearance. A clearance >1/16" should be achieved.