weld it with nylon rod using iron plastic welder.
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.
A new radiator.
If the radiator tanks are plastic you will have to replace the radiator.
yes :)
what should i use to fix a small crack on top of radiator. on a 1998 ford ranger what should i use to fix a small crack on top of radiator. on a 1998 ford ranger
Replace the radiator. It is plastic and cannot be repaired.
If the radiator cracks on top or bottom (bolth sides are plastic) ........ replace the radiator, can't be properly repaired.
Jb weld expoxy mix
A plastic radiator will crack under extreme over heat conditions for example a defective thermostat or bad cylinder head gasket will cause a cooling system to over pressurise and rupture.
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
Replace the radiator. Try JB Weld or JB Kwik Weld on the crack first -- you can pick it up for $4 and it is definitely worth a shot. I have tried the jb weld it didn,t work . I had to buy a new raditor ANSWER I work in a shop where we routinely replace the plastic tank. If you have to repair the plastic tank then do it from the inside. You can separate the tank from the core by carefully loosening the aluminum tabs holding it in place.