Nissan Repair: recommend a glue, upper tank, waterbox

Question
My car is Nissan Alitima 1997 GXE. Now the waterbox had a crack in the upper part about 3 inchs long. It have little leak and I need fill the water box in a few days. Do you know some glue can affix it?

Thanks and regards.

Yaoye

Answer
Yaoye,

If you are calling the overflow tank the water box then you can correct the problem with RTV silicone sealant.  Simply take the tank off and clean the area with a good detergent with a scrub pad and let it dry.  Then, use clear RTV to cover the crack and you should be good after 24 hours of dry time.  Reinstall and you should be good to go for years.  If you are talking about the radiator it self then you will have to have the upper tank replaced.  It costs about $50 bucks for an upper tank replacement.