My left radiator/low temp switch/material falure
Well, my Left Rad is a victim of the notorious failure near the brackets. One leak by each bracket. The bike went down on the left side before I bought it. The top row was bent down just enough that you could kinda tell. The very bottom row was still straight.
Last year, at about 20K miles, I installed the low temp switch in Picture 1. This year, at about 24K miles, that rad started to leak. At both the top and bottom rows and right next to the bracket.
I'm suspecting some electrolysis between that brass(?) switch and the alum radiator. Picture 2 shows the OEM switch made of a different material. What, I don't know. Maybe someone here does. Sorry the picture doesn't show, but the OEM plug is very silver. no gold metal anywhere.
I'm suspisious because I ran the bike from 16K miles (right after the lowside) to ~20K miles with the OEM switch, and zero leakage from the rad all summer and hot weather. And my bike regularly saw 220-225F. At ~20K miles, I installed the switch, and Engine Ice. About 4,000 miles later, and hardly any hot weather in that span, the rad fails.
I had my favorite radiator shop try to repair it, he told me it was definatly material failure, and although he tried to epoxy it, it didn't hold.
Does anyone agree that the problem may have been promoted by using that brass switch in an aluminum cooling system?