Pulsing Brakes

The Puzzler

TOM: I'm afraid! I'm afraid to even venture a guess!

RAY: He asks him, "Did anyone have his hands on your lug nuts?"

TOM: He asks him one question, and from the answer to that question, he knows what's wrong with the guy's car.

RAY: Mmm.

TOM: Wow!

RAY: And the question he asks him is, "Do you wash the car immediately after returning from these long trips?"

TOM: Awww! Really?

RAY: And the fellow says, "As a matter of fact..."

TOM: "Before I get home..."

RAY: "As soon as I pull into the driveway, before I even loosen my tie, I've got the hose out, and I'm hosing the dirt off the car, and in doing so..."

TOM: "Ach! I'm warping the disc rotors!"

RAY: By hitting those hot rotors with ice-cold water...

TOM: With cold water.

RAY: On one side only.

TOM: Oh, man! One side only!

RAY: Well, he's hitting just the wheel side of the disc rotor. When you go through a puddle, you're immersing the whole disc rotor in the water.

TOM: Yeah.

RAY: And so you tend to equalize the forces. But when the thing is red hot, because you've been driving like crazy to get home to your sweetie...

TOM: Yeah.

RAY: At least pulling into the driveway and wash the car, and you put that ice-cold water on that red-hot disc brake...

TOM: On one side.

RAY: On one side of it, zzzzzzt! It's warped! And who's our winner this week?

TOM: Wow! Oh, boy! That's good! I mean, that's good, but we're going to get a lot mail.

RAY: Don't we always?

TOM: I'm just letting you know, you know. We do have a winner. The winner is Jessie Dornstreich.

RAY: Dornstreich.

TOM: From Philadelphia, PA.

[ Car Talk Puzzler ]

Support for Car Talk is provided by:

Donate Your Car,
Support Your NPR Station

...and get a tax break!

Get Started

Find a Mechanic

Promo tile

Rocket Fuel