General Core Repair

NOTE: If the leak area surface is not clean, the repair material will not stick to the surface.

1. Position core so repair area is accessible.
2. Apply wet cloth between core pipes and headers if working near plastic tanks or joints, or submerge tank in water.
3. Heat repair area slightly with small torch or heat gun to be sure it is dry.
^ Do not use a blow torch.





4. Brush area to be repaired with small steel brush that is supplied in kit and remove dust away from repair area.

WARNING: To help avoid personal injury when using the primer (which contains trichloroethane) the following precautions and steps should be followed:
^ If primer Is swallowed, seek medical attention.
^ If primer contacts the eyes, do not rub eyes. Splash the affected area with large quantities of cold water and seek medical attention.
^ If primer contacts the body, wash thoroughly with soap and water.
^ Do not mix the primer with water.

5. Open tube of primer using spurred cap or pin and apply primer to repair area only. Use of primer produces stronger repair.





6. Scrub repair area with cotton swab until fresh swab stays clean.
^ Clear, yellow-brown coating does not have to be removed.





7. Heat repair area with heat gun or by moving small torch in circular pattern using soft, blue flame.





8. Withdraw small torch or heat gun and rub adhesive stick on repair area. Adhesive will flow at temperature of approximately 260°C (500°F).
^ If stick doesn't start to melt, remove it and reapply heat. Do not heat stick directly with flame. High heat will burn and char adhesive.
9. Continue heating until adhesive flows and wets entire repair area and fills joint. If a hole is in center of tube, heat tube and let hot surface melt and pull in adhesive. Force of flame or heat gun will also tend to guide adhesive toward hole. For leaks between tube and header, flow adhesive completely around tube and header joint with tank installed.
10. Heat repair area until adhesive is bubble free, smooth and has light yellow color. Curing is not required.
11. Test radiator for leaks when cool. If repair area still leaks, heat it gently to dry it. Heat and flow adhesive or apply more as necessary to repair leak.