[twobjshelbys]

Should I expect the expansion tank to be dry (empty) when the engine is cool? I filled it up to just above the baffle plate and got some blow off at the cap as things heated up. I expected it to do that to some degree and that it would find steady state. It was empty yesterday morning, but I left it alone and checked it again when it was cool enough to open the cap, and there was a little (but not alot) in the tank. This morning at cold it's empty again.

Does it do any good to put an additional recovery (like the bag I've seen on Mustangs) on the cap tube?