Tip for fixing radiator leak on upper driver side fitting
Both my '92 SSE supercharged and '93 SSEi developed a small coolant leak around the upper driver'* side oil fitting in the plastic end tank. In both cases, the oil line fitting was tight and wasn't leaking; the problem was the seal where the oil line fitting goes into the plastic end tank.
My first thought was that I needed to buy 2 new radiators, but I had already replaced the one on my '92 a few years ago, so I put on my "MacGyver" hat and removed the air box and used a large pair of angled pliers and gently and slowly tightened the outer retainer around the oil line fitting on each of my cars, and on both cars, the coolant leak stopped.
I hope this helps someone else...$0 in parts and 20 minutes of my time for each car sure beat replacing the radiator for $200 each plus 60+ minutes of my time for each car.
'99 Bonneville SLE, white, 112,000 miles
'02 Park Avenue Ultra, white diamond pearl, 88,000 miles