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Sunday, January 26, 2014

Fixing a Leaky Plastic Radiator

With the right tools, fixing a leaky plastic radiator is an easy way to remedy radiator issues while waiting for a replacement radiator to arrive. The first step, of course, is to locate the source of the leak.
The most obvious sign of a leak is steam erupting from a certain area on the radiator. If you don’t notice anything of this sort, wash the radiator and the hoses clean, fill the radiator up and wait for it to dry, then start the engine. Pressure buildup in the system will make leaks appear as wet spots on the radiator.

Once you’ve identified the source of the leaks, allow everything to cool off. Two options are best for repairing leaks on plastic radiators: plastic radiator repair epoxy or airless plastic welding. The former uses a two-part epoxy designed specifically to bind well with the type of plastic used for constructing radiators.
After cleaning the site of the leak thoroughly, mix the epoxy in equal parts and apply it liberally to the site. Leave the epoxy to set properly overnight before you top up the radiator with fluid and start the engine.
With the second option, a special tool is needed to melt the plastic before applying and mixing in a similar plastic to seal the leak. This type of repair is usually much more resilient than epoxy and should last long after you have a spare radiator on hand to permanently remedy the issue.

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