block off plate...earlier it was said someone used 'aluminum foil' for a block off plate. I used very thin black aluminum with edges bent 90 degrees around the corners and attach this easy 'on / off' removable
oil cooler block off plate with velcro attached to the side of the cooler. Getting brisk now in Meechigan in mornings (or later) and I start out with the plate on ..as day or car warms up and it is no longer needed i can very easily detach from the velcro connectors and throw it in the trunk til such time it is needed again. Bill