JB Weld? Drain fluid, make sure it's realllly dry. If it's cracked, smear JB weld or another epoxy compound that bonds to plastic, wait for it to cure (probably 4-6 hours), then refill fluid and see if it leaks at full operating temperature.
weld it with nylon rod using iron plastic welder.
Replace the radiator. It is plastic and cannot be repaired.
you don't repair a radiator overflow jug as they are usually plastic. Buy a new or used one from a sslvage yard.
Replace the radiator
No. Over the years, being a mechanic, I've tried every imaginable attempt at repairing the plastic and nothing has held. REPLACE THE RADIATOR. Usually radiator shops have the best prices.
The plastic tank on the side of the radiator can be replaced but it would be quicker and cheaper to just install a new radiator.
I would try epoxy, it will seal most items.
Call a plumber.
I had 2" crack on top of the radiator. I tried JB Weld and other similar putty but they did not work on plastic. I bought Permatex PermaPoxy™ 5 Minute Plastic Weld from Advanced Auto Parts for $7. It took 10 minutes to finish the job and it worked.
I just did this repair. First remove the air box. (three bolts). Next remove the right radiator fan (two screws). Now you have plenty of room to remove the hose. Use channel locks for the hose clamps. (remove). Remove hose. Buy new hose clamps. reverse to install. Fill radiator with 50/50 anti-freese. run motor check for leaks. top off radiator again. fill reservouir. there you have it.
5 %
The radiator is more than likely plastic and cannot be repaired ..DO NOT use any of those quick fix things like the radiator repair crud .. just take it like a man and replace the radiator............