« Reply #3 on: March 28, 2014, 05:48:28 PM »
most likely for aftermarket overflow bottle. junk it.
+1
Re: Overflowing...Yes, still is if you fill the radiator to the top on an early car. Coolant needs room for expansion. I've seen a few aftermarket ones that bolt into the two radiator mounting bolts that look nice. They aren't authentic looking by any means, but functionally a good idea. Oxygen entering in and out of the radiator brings about cooling system corrosion, hence the development of the overflow closed system of the later model vehicles.
« Last Edit: March 30, 2014, 08:07:43 AM by 67gtaclone »
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Richard Urch
1967 (11/2/66, S.J.) GTA Luxury Coupe, 289-4V w/Thermactor Emissions, C-4, Int./Ext. Decor +many options
2005 (04/05) GT Premium Convertible, Windveil Blue, Parchment Top w/Med. Parchment interior, Roush Body Appointments