Often when a leak is seen on a plastic radiator, many think it must be replaced when it can be repaired by a DIY type person.
Repairing a leak is an easy task that most any DIY backyard mechanic can do.
There are three ways to repair a plastic radiator.
3 Ways to Repair a Plastic Radiator
- Use a soldering iron to melt the plastic back into place.
- Use epoxy that melts into the radiator, fixing the leak.
- Solder the leak, then apply epoxy.
If you have a soldering iron, putting your soldering skills to work would be the cheapest option.
For those that don’t have a soldering iron, they are low-cost items.
Example Soldering Iron on Amazon
Weller D650 Industrial Soldering Gun
Using epoxy also has good results. The epoxy melts into the plastic, sealing up the leak.
Example Epoxy Plastic Repair Kit on Amazon
Versachem 90214 Plastic Tank and Radiator Repair Kit – 30 Grams
The third option is to do both soldering and epoxy, which doubles up on the leak, making it last much longer, if not for good.
How To Repair a Plastic Radiator Soldering Method
Drain the radiator if the fluid is leaking out, as the spot needs to be dry.
It will depend on how big the crack is as to how much melting of the plastic needs to be done.
After melting the plastic, testing it to see if it is still leaking is the only way to know if it is fixed.
Often epoxy is used in combination to make sure the leak doesn’t come back.
How To Repair a Plastic Radiator Epoxy Method
Using epoxy is a common method that uses chemicals that combine to cause a chemical reaction that generates heat melting everything together.
Epoxy has the added benefit of adding more material to a leak which can be a problem when the walls of a radiator are too thin.
Mixing the substances together that come in a kit is a straightforward, easy job. Be sure to follow the instructions and get the area clean before applying it.
Fixing your own radiator is a big money saver, especially when looking at replacements.
Most leaks are simple to fix and can be fixed within an hour or so.
Joints can be harder to repair, but the same principle is used. Often a joint is harder since they are in an inconvenient location which sometimes requires removing a part that is in the way.
Removing the entire radiator for hard-to-reach spots is the best way to fix it. Having good access to the problem area is ideal.
Sometimes the leak may be too big, and the radiator is damaged too much to repair, then it must be replaced.
Have you fixed a plastic radiator before? Let us know about it in the comment below.