This fix was suggested to me by a buddy who had used it before on his rad. The looseness of the bleed screw was worse on mine than his, yet it held up to very spirited driving which is why i said i was surprised. No coolant loss and no steam observed out of the bleed screw. It handled as much pressure as the rad cap. In any case i have changed the rad...with the clutch fan out, it was just too tempting not to try.
People can be as terrified of observed data as some. Its a free country.