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Old 02-03-2024, 10:50 PM   #2
Dead Parrot
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Join Date: Aug 2012
Location: Oklahoma City, OK
Posts: 2,496
Re: ? about the Radiator Coolant Tank Cap

Don't think it matters. A lot of overflow tanks have a built in vent at the top that directs any overflow down the side of the tank. I replaced the lost cap on my 79 Camaro with a metal Wylers bullion cap. Worked for years and a near perfect fit.
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