Radiator Cap

HOW TO DETECT THE RADIATOR CAP FAILURE

The first step of the part diagnosis is visual inspection. You need to inspect the cap and make sure it is intact. Any mechanical damage (scratches, cracks, rust) shows that it is time for the cap replacement. Next, you have to examine the spring. For this purpose you need to compress it. If the spring compresses too easily, it has already reached its service life limit and is subject to replacement.

Inspect the pressure relief valves: if the part is in good working order, they should raise effortlessly and return to their initial position under the action of the spring. You can check the cap tightness on the test bench. It must sustain the nominal pressure specified by the manufacturer.