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#2617: Definitely Not OK

#2617: Definitely Not OK

The Best of Car Talk Feb 28, 2026 36 min
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About this episode

Click and Clack, the Tappet Brothers, dive into quirky car-related stories and listener questions, including a humorous take on alternative word definitions and a detailed discussion about tire matching on four-wheel drive vehicles. They also address a caller’s concern about a 1993 Ford Explorer idling for hours, reassuring that modern fuel-injected engines handle such situations well. The episode blends practical car advice with lighthearted banter, featuring unique callers like Brother Roger from a New Mexico monastery and a Colorado listener worried about her daughter’s car mishap.

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Technical Too Afraid to Ask
Term

four-wheel drive

"We have like seven four-wheel drive vehicles. Ah, four-wheel drive for the desert?"

Four-wheel drive means the car can send power to all four wheels at the same time, which helps it drive better on slippery or rough roads.

Car

Dodge Ram

"...icles, but what triggered it was when I took our Dodge Ram four-wheel drive truck into the Dodge dealer and..."

The Dodge Ram is a big truck that can drive on tough roads and carry heavy things. People like it because it can go off-road and pull trailers, so it's good for work or outdoor activities.

Part

differential

"are linked by the gears and the differential, if you have two different-sized tires,"

The differential is a part in your car that helps the wheels turn at different speeds when you go around corners, so your car drives smoothly without the tires slipping.

Part

spider gears

"you will be spinning what's called the spider gears. And they will be spinning all the time"

Spider gears are tiny gears inside the differential that help your car's wheels spin at different speeds when you turn, so the car handles better.

Term

transfer case

""Unless we throw the transfer case in. Right, correct. So his heart may be in the right place.""

A transfer case is a part that helps send power to both the front and back wheels so the car can drive all four wheels at once.

Term

all-wheel drive

""No, that's not true unless the vehicle is an all-wheel drive vehicle where the four-wheel drive is engaged all the time.""

All-wheel drive means the car can send power to all four wheels all the time, helping it stay stable and grip the road better.

Brand

Subaru

"Well, in fact, in a vehicle like a Subaru, it's more important."

Subaru is a car company that makes cars with special engines and all-wheel drive, which helps cars drive better on slippery roads.

Car

Ford Explorer

"Well, I'm calling you because I think I have a problem. I have a 1993 Ford Explorer with 120,000 miles on it. My daughter, who lives next door,"

The 1993 Ford Explorer is a type of SUV made by Ford. It was popular in the 1990s because it could handle different types of roads and was good for families or outdoor activities.

Term

ignition

"He got out of the car and forgot to shut the ignition off."

The ignition is what you use to start or stop the car's engine, usually by turning a key or pressing a button.

Term

engine idling

"So the car idled for seven hours or more."

Engine idling means the car's engine is running but the car isn't moving. Leaving it on for a long time can waste gas and might hurt the engine.

Term

carburetor

"Because his car had a carburetor in it. And this thing is fuel injected"

A carburetor is like a simple machine that mixes gas and air for a car's engine to run. Older cars used it before computers helped control this process.

Term

fuel injection

"And this thing is fuel injected and it has many devices which are designed to keep the fuel-air mixture exactly right"

Fuel injection is a way cars get gas into the engine using computers to make sure the right amount is used. This helps the car run better and cleaner.

Term

fuel-air mixture

"which are designed to keep the fuel-air mixture exactly right and to change it when it goes astray."

The fuel-air mixture is how much gas and air get mixed together for the car to run. Getting this mix right helps the car work well.

Concept

engine control computer

"because you were sleeping. And the computer kept everything going perfectly all night long. You mean those cars now?"

A computer in the car helps control how the engine works by making sure everything is just right. It helps the car run better without the driver needing to do anything.

Part

fan belt

"I mean, if something had happened in the night, for example, if the fan belt had broken"

The fan belt is a rubber band inside the car's engine that helps keep the engine cool and powers some important parts. If it breaks, the car can get too hot or stop working properly.

Term

shutdown mechanisms

""But they do have shutdown mechanisms, which your car doesn't have. For example, if the oil pressure drops off,""

Shutdown mechanisms help protect your car's engine by turning it off if something goes wrong, like if it doesn't have enough oil pressure.

Part

throw-out bearing

"And basically, I had a really bad problem with my throw-out bearing. One day, I went out to drive. And whenever I put it in the clutch, it would just start screaming. Really, really loud. And so, I have a mechanic buddy who said, that is your throw-out bearing. It is bad. Yeah, it could be."

This is a part inside a manual car that helps you change gears smoothly. When you press the clutch pedal, this part moves to let the gears change without grinding.

Part

clutch kit

"We go buy a clutch kit. Good. And we buy a gasket."

A clutch kit is a set of parts that helps your car change gears smoothly. It connects the engine to the wheels and lets you switch gears when driving.

Part

gasket

"Good. And we buy a gasket. We put both of those on."

A gasket is like a seal or a sticker that stops oil or other fluids from leaking out where two parts of the engine meet.

Part

pressure plate

""So, we put in the whole clutch kit with the throw-out bearing and the pressure plate in""

The pressure plate is a part that pushes the clutch disc to connect the engine to the wheels. When you press the clutch pedal, it lets go so you can change gears.

Part

rubber boot

"There's a little rubber boot on the side of the transmission where that fork enters the bell housing."

A rubber boot is like a soft cover made of rubber that keeps dirt and water out of important parts in your car, helping them work better and last longer.

Part

bell housing

"You can see that little ball. There's a little rubber boot on the side of the transmission where that fork enters the bell housing."

The bell housing is a metal cover that connects the engine to the transmission and keeps important parts inside safe. It looks like a bell shape and helps hold everything together.

Part

grease

"You might be able to just get in there with a little brush and put some grease on that and you might, might ever, might be able to get that squeak to go away."

Grease is a slippery stuff you put on car parts so they move easily and don't make noise or get damaged.

Part

WD-40

"I would squirt it with the little WD-40 first and then put the grease on it."

WD-40 is a spray you can use on your car to stop noises and help parts move better.

Part

thrust bearing

"the thrust bearing in your engine is worn out. Uh-huh. And if that's the case, as you're stepping on the clutch, you're moving the whole crankshaft towards the front of the car."

The thrust bearing is a part inside the engine that stops the main spinning shaft from moving too much forward or backward. If it gets worn out, the shaft can move too much and break things inside the engine.

Part

crankshaft

"as you're stepping on the clutch, you're moving the whole crankshaft towards the front of the car."

The crankshaft is the part inside the engine that turns the up-and-down movement of the engine parts into spinning that makes the car move. If it moves too much, it can break the engine.

Term

oil leak

"I've had an oil leak and it seemed kind of subtle and it's gotten a little worse. And my husband checked some bolts and he wants to put on a lift and clean the engine to locate the leak."

An oil leak means the engine's oil is dripping out somewhere, which can cause problems if it runs too low. It's important to find and fix the leak to keep the car running well.

Term

black light process

"Our old mechanic in Harrisburg, who we trusted, where we moved from told me that I'd probably need to do a black light process, which he doesn't do."

A black light process is a way mechanics find leaks by adding a glowing dye to the oil and shining a special light that makes the leak show up bright. This helps find exactly where the oil is coming from.

Brand

Volvo

"except in most cases the rear main seal hardly ever leaks on Volvos."

Volvo is a car company from Sweden that makes cars known for being safe and lasting a long time.

Car

GMC S-15

""Well, I set on fire one of those modern marvels of American engineering called a GMCS-15 pickup. Uh-huh. Yeah.""

The GMC S-15 pickup is a small truck made by GMC a long time ago. It was like a smaller version of bigger trucks and was good for people who wanted a truck that used less gas.

Term

starter fluid

"So I sprayed some of that lovely etherized starter fluid. Starting fluid. Ah, yes."

Starter fluid is a spray that helps your car's engine start when it's having trouble. You spray it into the engine to help it catch fire and run.

Part

air filter cover

"I took off the air filter cover, sprayed some of that in there and tried to start it up"

The air filter cover is a part that keeps the air filter safe. The air filter cleans the air before it goes into the engine.

Part

dry chemical fire extinguisher

""have I done any permanent damage to my engine by having some dry chemical fire extinguisher down inside it? No. No, as a matter of fact...""

A dry chemical fire extinguisher sprays powder to put out fires. Using it inside an engine is unusual but usually won't cause damage.

Part

catalytic converter

""that's what they put in the catalytic converters to reduce the emissions. So if anything, if anything, you've reduced.""

A catalytic converter is a part of the car that cleans dirty gases from the engine so the air is cleaner when it comes out.

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