While changing the oil on our old spare 95 Explorer today, I noticed a steady drip of coolant from the radiator. I had not noticed any pooling until today, but it is dripping enough to mark its territory. I spotted the leak on the radiator tank. There appears to be a small crack on the flat forward area of the plastic tank, right on the opposite side of the upper inlet. Other than this, the radiator still appears very clean inside & out.
Has anyone ever repaired a small plastic tank leak such as this with JB Water Weld? I've read more than a few posts of people sealing plastic tanks with this stuff that last for years. I figure it's worth a shot. If it doesn't work, and I have to replace the radiator, not much time or effort lost. If it does work, $220 saved for a while.
edit: also seems to be suggested to drill a divot into each end of the crack to stop from progressing any further. I haven't removed the radiator yet to check it out. If it's bad enough I'll just replace it.