CURING A LEAKING RADIATOR
1. If the leak is at the coupling to the pipe there’s probably little cause to worry. Tightening the nut may be enough to stop the leak. If not, you need to undo the cap nut, take off the fitting, then replace the olive inside.
You’ll need to drain the radiator before you can tackle this job.
And if you need to carry out repairs to the valve, you’ll have to drain at least part, if not all, of the system.
If the leak is caused by corrosion, the only cure is to fit a new radiator. You can make a temporary repair, however, using a plastic resin filler.
2.To work on the radiator you will need to isolate it, by turning off the valves at each end. To turn off the lockshield remove the cap which holds it in its set position then fit a key onto the top.
3.Next turn off the manual valve at the other end. You can then take the radiator out to replace it or carry out a temporary repair.
If you install a new radiator. You can avoid further corrosion problems by adding a rust in-hibitor to the water after flushing out the system with clean water.