Bill, the rad would have to be really bad to let the engine overheat sitting in the shop. If it over heats real soon after start up you probably have a blockage, like a stat froze closed, or upside down, or the water pump isn't moving water. If you pull the upper hose off the housing and don't see the pointy end of the stat, it's in wrong. A bleed hole will help with the possibility of air pockets. You could pull both upper and lower hose off, block off the lower hose outlet, fill it with water, then remove the block from the lower outlet. That will give you an idea of the flow through the rad. Mike
