What to do with rod knock for tempary fix?

For a temporary fix of rod knock, you can try adding a high-mileage oil or a thicker viscosity oil to help reduce the noise and provide better lubrication. Also, using an oil additive designed to quiet engine noise may offer some short-term relief. However, these are just stopgap measures; the underlying issue needs to be addressed promptly to prevent severe engine damage. Ultimately, consider planning for a rebuild or replacement of the engine as a long-term solution.