| Final | time | | 1. Browning Ross |  United States | 4:00.4 | | 2. Guillermo Solá Aravena |  Chile | 4:00.5 | | 3. John Twomey | United States | 4:02.0 | | 4. Curtis Stone | United States | 4:03.7 | | 5. Oscar Gauharou |  Argentina | 4:04.2 | | 6. Luis Gonzaga Rodrigues |  Brazil | 4:05.5 | | -. Hugo Ponce | Argentina | | | -. Libardo Mora |  Colombia | | | -. Frank Prince |  Panama | | | -. Wilfred Tull |  Trinidad Tobago | |
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| Heat 1 | time | | 1. Curtis Stone | United States | 4:08.9 | | 2. Guillermo Solá Aravena | Chile | 4:08.9 | | 3. Hugo Ponce | Argentina | 4:10.1 | | 4. Libardo Mora | Colombia | 4:10.8 | | 5. Frank Prince | Panama | 4:11.9 | | 6. Luis Secco | Argentina | | | -. Luis Modesté | Trinidad Tobago | | | -. Guillermo Rojas |  Guatemala | | | -. Argemiro Roque | Brazil | DNS | | -. Anastasio Zelaya |  Paraguay | DNS |
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| Heat 2 | time | | 1. Browning Ross | United States | 4:13.8 | | 2. John Twomey | United States | 4:13.8 | | 3. Luis Gonzaga Rodrigues | Brazil | 4:14.4 | | 4. Oscar Gahuarou | Argentina | 4:14.9 | | 5. Wilfred Tull | Trinidad Tobago | 4:15.2 | | 6. Haroldo Gallardo Monsalves | Chile | | | -. Rubén Figueredo | Paraguay | | | -. Rogelio Gomez Rodriguez |  Peru | | | -. Efrain Recinos | Guatemala | DNS |
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