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Unlike the Revel, it broke down constantly, teaching me new vocabulary words like “idle jet,” “petcock” and “lean oil mixture.”

A mechanic discovered that the car’s petcock - a small valve at the bottom of the radiator - had been loosened, and the water had leaked out.

A mechanic discovered that the car’s petcock — a small valve at the bottom of the radiator — had been loosened, and the water had leaked out.

Once that has been solidly coursing for 10 minutes, cap the vent with the petcock.

Let’s start with the elephant, a.k.a. the pressure canner: hulking and heavy with gaskets, dials, clamps and something called a petcock.