radiator cap

[briggie]

A college student drove his ratty, raggedy old car into the mechanic's shop, needing some repair advice for his jalopy.

The mechanic looked at it for a couple of minutes and said, "What you really need is the radiator cap solution."

"Oh," said the student, trying not to sound too confused, "Do you mean the radiator cap isn't holding enough pressure?"

"That's part of the problem," the mechanic said. "You need to lift the radiator cap and drive another car under it. Then you can replace the radiator cap, and it should solve your problem."