It is often cheaper and easier to buy a newer-style aluminum or plastic radiator, but if you are set on attempting an a- home fix of your older, brass radiator, it can be done. Be sure to keep an eye on any patches you apply. Do not count on a patch as an indefinite solution; it should be viewed as temporary.
Instructions
- 1
Remove the radiator from the vehicle.
2Drain any remaining coolant from the radiator.
3Use lacquer thinner on the cracked area to remove the paint.
4Pour denatured alcohol into the radiator and turn it so the alcohol runs out the crack. This will clean the inside.
5Spray the cracked area with a non-flammable brake cleaner to further remove any oil or residue.
6Cover the whole backside of the damaged area with masking tape to prevent dripping. Make sure to leave no open seams.
7Mix a two-part epoxy together in a cup until it is the consistency of honey. Add denatured alcohol (1 capful at a time) to the epoxy if you need to thin it.
8Place the radiator, tape side down, on blocks and pour the epoxy mixture on and in the crack.
9Warm the patch with a hair dryer to speed up hardening time. Be sure not to get it hot, just warm.
10Remove the tape and test the radiator for leaks. When satisfied, reinstall the radiator.
