Join the Car Talk Community!

Bringing a Dead Bug Back to Life

The Puzzler


TOM: When he opened the hood, he found a pair of coveralls, a spare tire - and a jack.

RAY: He got into the car, and turned the ignition key to the "on" position. There was no point to turn it to "crank," because the battery was what? Dead.

He pumped the gas a couple of times, like you would do in one of those old cars to prime the carburetor.

He then jacked up one of the rear wheels, which are the wheels that receive power from this engine. He put the transmission in gear; probably -- I'm guessing -- third gear. If you put it in fourth gear the engine would turn too slowly. If you put it in first, it would be too hard to turn the engine.

What he simply did was turn that tire that was elevated off the ground by hand with the transmission in gear.

He begins to turn the wheel really fast. Once it began to turn, the engine actually started up and ran and that wheel began to turn on its own.

The reason the other wheel didn't turn is because there's a differential, which will only send power to the wheel with the least amount of resistance.

Finally, of course, he would get into the car, take it out of gear, get out and lower the jack down, and if he was lucky he would drive to work without stalling.

So, do we have a winner?

TOM: The winner is Kevin Powell from Scotch Plains, New Jersey, wherever that is.

RAY: That's right next to Scotch Guard.

TOM: For having his answer selected at random from among all the correct answers that we got, Kevin will get from us a 26 dollar gift certificate to the Shameless Commerce Division at cartalk.com, with which he can pick up a stainless steel Car Talk thermos.

[ 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


Go



Submit


Rocket Fuel