Leroy, I had similar on my car. An MMC aluminium rad. The top bracket welded to the tank was peeling away. No leaks just weld failure.The reason was poor alignment of the fixing point on the cross bar, it was putting lateral strain on the bracket. I used JB Weld initially but that failed despite me adjusting the alignment. I eventually put a separate steadying bracket over the top of the tank, formed to match the tank profile with a padding to reduce/prevent rubbing wear. Did the job about 6/7 years ago and no problems. The rad was a replacement put on by a previous owner. Not well done as the mis alignment was a basic error. It was done at a dealer too so no excuses. My fix was making the bolt hole oval to line up better but the extra bracket would be fine on its own.
