I'm not very knowledgeable when it comes to the cooling system. I have a 71 small block. There is a hose just beneath my radiator cap. I believe its only purpose is for overflow, correct? Why do some of the the earlier c3's have expansion tanks and some don't? I had a small spot of antifreeze under my car. It was directly beneath this hose located beneath the cap. I just had some work done, and antifreeze was added. I'm guessing this was the cause. Thanks in advance for your reply.
Greg
Greg
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