Radiator leak

[Muddassir]

My radiator doesn't leak continously, but it leaks a lot at once when it is on park position and was driven for like 2 hours.

What could be the possible cause?

[Eye8Pussies]

check for a crack in the radiator, and check all the fins as well- a good way of checking hte fins is by looking for red crystals on them, which means that coolant is leaking through

if oyu have a crack, then you'll most likely have ot replace the rad
if it's the fins, you can use the stop leak stuff

[Muddassir]

Thanx
I am trying stop leak today. Does it go well with just water, or I need antifreeze coolent for it for sure?

[Eye8Pussies]

I believe that you should still have the regular mix of water and coolant- if I remember correctly, it will also tell you on the back of the bottle