You can fix an
oil cooler just like a radiator, find the leak and solder it shut. To avoid future leaks, try not to blip the throttle @ startup, as this creates a very high pressure spike that can create a leak. I found this out from Earl's, when I sent my first
oil cooler back for warranty after it developed a leak. I added a bypass thermostat, but Earls makes a check valve that will shut off flow at very high pressure loads. Try
www.amstreetrod.com for an quote.