Reason for radiator failure
Don't know how true it is for our coaches but, here goes.
Back in 1970's I had the radiators fail in two separate cars.
The owner at the radiator shop told me it was because the anti-polluting additions and rules dictate that the engines run hotter in order to burn the pollutants. Because of this the radiators had to be able to "flex" (expand and contract because of heat) more. So the manufacturing process (read soldering here) meant use less tin and more solder. This then meant that the joint/sealing medium solder was less resistant to acids eating at the solder. This acid state of the antifreeze was caused by the higher engine temps causing the antifreeze to break down after a couple/few years. This time frame was quite variable because of the frequency with which a vehicle was driven.
PLAY SAFE. REPLACE YOUR ANTIFREEZE AFTER THREE YEARS OR 30,000 MILES. Just saying to be on the safe side. I am not an expert on this but merely relating my experience and a conversation I had with someone that owned and worked his radiator repair business.
Topic: Reason for radiator failure