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Hose, evaporator connection..

Gerald K4NHN on Fri September 19, 2008 8:21 PM User is offlineView users profile

I was thinking ahead today about if I have to remove the evaporator on the Chevy Luv truck I'm working on. So I tried to break the joint apart on the low side. It didn't want to come apart, using a back up wrench and another to turn the slip joint side. The fixed nut is alum and the slip nut is steel.. with so many years together, it doesn't want to come loose. Any suggestions, I've applied some Kroil which I've used for many years with good results. Can I use some heat to make it give way if it comes to having to get it apart.

Gerald K4NHN
Cayce, SC

GM Tech on Fri September 19, 2008 10:18 PM User is offline

That is galvanic corrosion- there are methods- but I've never got them to work- the aluminum threads will stay in the steel nut if you continue- Do a forum search for galvanic corrosion..

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Gerald K4NHN on Fri September 19, 2008 10:58 PM User is offlineView users profile

I understand what galvanic corrosion is but the scearch didn't turn up anything here on the fourm. I've had the threads to come off before with the two different metals, a real bad feeling.. I had done a scearch on this but didn't find anything that addressed the problem. I may not have put in the right words to get the answers....

Gerald K4NHN
Cayce, SC

TRB on Fri September 19, 2008 11:52 PM User is offlineView users profile

Try these for starters.

http://www.google.com/search?ie=UTF-8&oe=UTF-8&q=galvanic+corrosion&btnG=Google+Search&domains=autoacforum.com&sitesearch=www.autoacforum.com

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Gerald K4NHN on Sat September 20, 2008 12:04 PM User is offlineView users profile

Thanks Tim, I don't know why they didn't turn up when I did the galvanic corrosion search.. But some good reading.
Gerald K4NHN
Cayce SC

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