Rad overflow bottle
#3
The choices are endless! I built this one (bolted to the radiator support)from an old inert gas bottle I found in a scrap bin:
#5
No they don't have to be air tight. They should hold a pint to a quart. My bottle is about 3/4 qt. and it never gets much in it. The hose needs to go into the bottle to near the bottom, so it will syphon coolant back as the radiator cools. Mine is just stuffed into the top and cut to be about 1" off the bottom. The strap to mount it is called a "minerallac strap" and they can be purchased at Home Depot, or any electrical supply house. They are used to hold electrical conduit, and come in sizes from 1/2" to 4". I used a 2" for mine.
Last edited by 1971BB427; 11-13-2012 at 08:37 PM.
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