Has anyone had sucess with rad stop leak products. My leak is between the plastic tanks and the core it seems to be both bottom corners.

 

I've used Stop Leak on a few older cars in the past. Always worked pretty good for the leaks that I had.

I think it was called Bars Stop Leak. It looked like fine metal powder.

I have no idea if this stuff is good or bad for your engine in the long run, though I suspect a proper repair is the best solution.

 

If you use stop leak it could have adverse effects on your heater core and replacement of that is over $1,000------------------- there is a large rubber gasket that is between each tank and the core, it is common for this gasket to shrink after a few years and start leaking. Most of these leaks occur in winter because gaskets, plastic and metal contracts. When hot or summertime the leaks sometimes stop. The repair shop will remove the gaskets and replace them. For a quick inexpensive repair you could try recrimping the small metal tabs on the core to make them fit tighter on the tanks. This sometimes works but these tabs can only be crimped a few times then they may break. Since these leaks appear to be on the bottom be sure the actual leak is not higher up and dripping to look like the source is the bottom area

 

Try JB Weld.

 

Just get a new radiator. 2 screws on the shroud, 4 screws on the upper mounts, and two hose clamps, (and two transmission lines on an automatic) and the thing pulls right out. Modine is my brand preference.... lifetime guarantee, and made right here in Michigan.

-Joe