holy cow I missed a huge part. You said 1/8npt...the inlet for your rad is 3/4" so you should be using no less than 3/4 like 745 and those said. I thought you had 1/2"npt for some reason I read it wrong. I bet that will get you much cooler doing that this weekend. Now will it help egt or not is the next question.
...BTW your Bieber avatar is awesome.-Malone
Those fittings come in a lot of veg conversion kits, and they can last quite awhile, but I have seen some get pretty misshapen even without an overheat. they should be fine for some running around, but I would for sure change them out in the long run.
I have used the plastic fittings for a temporary in the actual coolant lines when I couldn't get any other fittings and there were no hoses at the parts store. As soon as I got the right hose I took them out, so I have no idea how long they will work or if you should keep them. Maybe get some brass fittings and keep them with you just in case. This at least isn't as bad as the engine coolant system for making it home.
You also want to plumb it so that any air will end up at the expansion tank. Otherwise purging may become a challenge.
Quote from: libbydiesel on December 09, 2013, 12:31:20 pmYou also want to plumb it so that any air will end up at the expansion tank. Otherwise purging may become a challenge.Agreed; make the expansion tank the highest point of the system instead. I've dealt with B5 Passats that like to get air in the heater cores due to the being the high point in the system instead of the expansion tank. Save yourself the hassle and make the expansion tank the high point and main filling reservoir.