How to repair a radiator leak???

Question

Hi, I'm in the U.S. My car had a small crack in the radiator recently because of over heating. Now whenever the radiator fluid is warm, it leaks out from that crack. I think its the plastic part of the radiator. Or it may be metal, not sure. Is there something I can seal that crack with? Thanks for your help.

Answer 1

Two ways I sealed a leak in my radiator, first of all it can depend on the year of the car anything before 1995, there is a trick allot used car dealers use its three raw eggs only! it works for a couple of months.
Second is to have the remove the radiator and make sure you tape up what hoses go were and number them so when you put it back it wont be so hard. oh but first of all use your brain first, what I do is just look at the radiator without nothing, look at the hoses, look above it, under it, the work of it, and read on it, know how it works, did you know its nothing nothing hard to fix it! well getting back to second part, their is a pressure tester @ your local Kragen or I highly recomend auto zone (its the best for car parts etc) and buy that pressure tester on your radiator and you can see where the leak is at when the air pressue goes on the cap. You will probably have to move is what i call the fins, that black fish fins like part of the radiator, remember it wont be that easy but just simple. then once the leak is located have a welder weld it or an auto zone you can buy the cement glue. well I hope you fix your radiator..

Answer 2

If it is plastic, drain the fluid and try JB Weld, follow the directions then put it on like putty to cover the crack. Let it stand for at least 36 hours, refill and off you go. Be sure to prep your area with some type of a cleaner like alcohol or acetone.

Answer 3

Best way is to replace it with a new (or junkyard) radiator. But if that will hurt your budget too much, you can try patching it together with an epoxy type glue such as JB Weld.

Answer 4

Araldite worked for me!!