# Coolant (anti-freeze) corrosive to galvanized steel? \*pics\* **URL:** \ **Category:** SON240sx Automotive\ **Created:** [May 21, 2004, 8:49pm UTC](https://forums.speedlife.net/t/coolant-anti-freeze-corrosive-to-galvanized-steel-pics/81015 "2004-05-21T20:49:32Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [May 21, 2004, 8:49pm UTC](https://forums.speedlife.net/t/coolant-anti-freeze-corrosive-to-galvanized-steel-pics/81015/1 "2004-05-21T20:49:32Z")
I needed to make an adapter for a water temp gauge so I went and bought a 35mm galvanized tubing from Home Depot and had my dad weld on a threaded adapter. This tube will go between the upper-rad hose (once I cut the hose in 1/2). **The big question is.** Will this tubing corrode from coolant over time? I doubt it will corrode to the point that it will leak but I don’t want like the metal to slowly deteriorate and pollute the coolant (as whacked as it may sound). This is what it looks like on Phil’s KA-T. The piece he has is made by GReddy ($60-$75CAD). It’s the blue piece you see between his upper rad hose. THIS IS **_NOT MY CAR_** 🙂 ![http://www.mach1.ca/images/phil/tempadapter.jpg](http://www.mach1.ca/images/phil/tempadapter.jpg) Here is the adapter my dad made (cost me $4 for the tubing). The copper piece is the Autometer temperature probe (used by electric gauges): ![http://240sx.cubicdesign.com/images/2004/tempadapter/pic1sm.jpg](http://240sx.cubicdesign.com/images/2004/tempadapter/pic1sm.jpg) ![http://240sx.cubicdesign.com/images/2004/tempadapter/pic5sm.jpg](http://240sx.cubicdesign.com/images/2004/tempadapter/pic5sm.jpg) More pics… [http://240sx.cubicdesign.com/images/2004/tempadapter/](http://240sx.cubicdesign.com/images/2004/tempadapter/) ---
**Author:** ![Sven](https://avatars.discourse-cdn.com/v4/letter/s/e47c2d/32.png) [@Sven](https://forums.speedlife.net/u/Sven)\ **Post date:** [May 21, 2004, 10:50pm UTC](https://forums.speedlife.net/t/coolant-anti-freeze-corrosive-to-galvanized-steel-pics/81015/2 "2004-05-21T22:50:34Z")
> [@Gonad](#): > > Will this tubing corrode from coolant over time? Yes. Over 100 years. I don’t think you have to worry about any corrosion for the life of the car though … ---
**Author:** ![jjm\_240sx](https://avatars.discourse-cdn.com/v4/letter/j/b77776/32.png) [@jjm\_240sx](https://forums.speedlife.net/u/jjm_240sx)\ **Post date:** [May 22, 2004, 1:19pm UTC](https://forums.speedlife.net/t/coolant-anti-freeze-corrosive-to-galvanized-steel-pics/81015/3 "2004-05-22T13:19:57Z")
Do you think that the metal will absorbe the heat and give you faulty readings? ---
**Author:** ![SHIFT\_KA24DET](https://avatars.discourse-cdn.com/v4/letter/s/b9bd4f/32.png) [@SHIFT\_KA24DET](https://forums.speedlife.net/u/SHIFT_KA24DET)\ **Post date:** [May 22, 2004, 1:24pm UTC](https://forums.speedlife.net/t/coolant-anti-freeze-corrosive-to-galvanized-steel-pics/81015/4 "2004-05-22T13:24:25Z")
> [@jjm\_240sx](#): > > Do you think that the metal will absorbe the heat and give you faulty readings? No ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [May 22, 2004, 2:22pm UTC](https://forums.speedlife.net/t/coolant-anti-freeze-corrosive-to-galvanized-steel-pics/81015/5 "2004-05-22T14:22:03Z")
> [@FrEaK](#): > > Your dad knows welding galvanized steel is highly toxic right? My dad can’t weld. He had someone else do the welding. And I guess that person probablly knows about it. In anycase, I guess this is ok then. My dad tells me to paint the metal (inside and out). Don’t know if that’s a good idea. Comments? ---
**Author:** ![SHIFT\_KA24DET](https://avatars.discourse-cdn.com/v4/letter/s/b9bd4f/32.png) [@SHIFT\_KA24DET](https://forums.speedlife.net/u/SHIFT_KA24DET)\ **Post date:** [May 22, 2004, 2:41pm UTC](https://forums.speedlife.net/t/coolant-anti-freeze-corrosive-to-galvanized-steel-pics/81015/6 "2004-05-22T14:41:42Z")
Where did you get that fitting that is welded onto the pipe? ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [May 22, 2004, 8:52pm UTC](https://forums.speedlife.net/t/coolant-anti-freeze-corrosive-to-galvanized-steel-pics/81015/7 "2004-05-22T20:52:15Z")
My dad fabbed some little cylindrical metal piece which he then drilled and tapped threads onto. He then drilled a hole on the tubing and placed this metal piece in and welded it on. ---
**Author:** ![Sm0ke](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@Sm0ke](https://forums.speedlife.net/u/Sm0ke)\ **Post date:** [May 22, 2004, 9:53pm UTC](https://forums.speedlife.net/t/coolant-anti-freeze-corrosive-to-galvanized-steel-pics/81015/8 "2004-05-22T21:53:08Z")
I highly doubt that the coolant will corrode the metal. OT: That’s a nice weld! 😉 ---
**Author:** ![Racer\_XTREME](https://avatars.discourse-cdn.com/v4/letter/r/e47c2d/32.png) [@Racer\_XTREME](https://forums.speedlife.net/u/Racer_XTREME)\ **Post date:** [May 24, 2004, 12:25pm UTC](https://forums.speedlife.net/t/coolant-anti-freeze-corrosive-to-galvanized-steel-pics/81015/9 "2004-05-24T12:25:36Z")
I have the same piece to extend one of my coolant hoses when i did the swap, and it turned rust colour, but has not leaked yet, and we are going on 3/4 year.