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Discussion Starter · #1 ·
Hello Brand new here, Just bought my 67 Chevy ll with 327 rebuild. I noticed the upper hose is sucking in from pressure. After it cools and i crack the cap it blows back up, also a little antifreeze on ground. After looking i have discovered no overflow. I had the cap tested yesterday at Auto Zone they pressure tested it said it was bad so got one with release valve on top. It also feels like the upper hose is weak.
1. Do i have to have an overflow?
2. Are the reinforced chrome hoses better than the rubber?
3. Could there be any other issues i should look at?

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