So I installed a new radiator this weekend.

I notice a small leak coming from the Fan switch. I did re-use the old fan switch and didn't take note of the O - Ring on the switch.

I thought it was my fault because I didn't tighten the switch enough but it's pretty tight and I don't want to over tighten.

I will replace my O- ring, does anyone know if I need to use sealant or not?

 

Teflon tape on the threads will fix your problem.

 

I used a light amount of permatex ultra grey sealant (Hondabond) sealant on my spoon rad which I just did this weekend, works fine and I've re-used my switch three times with the same o-ring. But my threads were completely dry on a new install, if you can't get the threads totally dry teflon tape is a good idea too like suggested above. Make sure you still have the o-ring in place when you pull the switch this time, check to see that it isn't deformed or missing.

 

Thanks for the replies guys.

I'm thinking I will replace the switch tonight with a new one for peace of mind and add the bond suggested.

I didn't think about the threads of the switch being sealed when I got to this part.

Thanks again.

 

So I was about to go crazy this morning when I saw Coolant under my car and realized it was coming from the new switch.

I was about to go "HULK SMASH" well I wrapped it with Teflon and tightened it.

No leaks when I got to work, I would usually see a pool under the switch area on the splash guard.

:-) so freaking happy now!!

http://www.flickr.com/photos/81346647@N08/7734127062/http://www.flickr.com/photos/81346647@N08/7734127062/ by http://www.flickr.com/people/81346647@N08/, on Flickr

 

Thread sealing isn't mentioned in the shop manual as being needed, but I think it is a good idea when dealing with cooling system threads. Good to see you got it corrected.