Found this on only one side Do I need to have of these rubber gaskets on both. Both my tubes look to be 3/4. One had a fitting stuck in it that was deteriorating so I pulled it out that I assume was for the 5/8th. What is that called and where can I pick a new one up
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WildCard600
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That looks like a undersized hose that someone stuffed into the heater core nipple instead of over it.
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Not factory
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Yeah no "gaskets" on those, just hose clamps.