Over the years I have noticed that many owners never even consider replacing their radiator or expansion tank cap. I have seen some pretty bad ones come into the shop. A bad radiator cap hardly ever leads to severe problems, but it can be the cause of minor coolant loss and drips on your garage floor.
Problem & Solution
Common among these chassis:
The next time your engine is cold, remove the cap and carefully inspect the seal. in many cases you may see cracks in the rubber and a deformed seal as shown in this picture. We carry new caps for most models. They are inexpensive and the easiest do-it-yourself job I know of!