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"Cool it! The Truth About Antifreeze They don't Want You to Know"

"Cool it! The Truth About Antifreeze They don't Want You to Know"

Car Connection Workshop Nov 06, 2025 29 min
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About this episode

Dive into the essential truths about antifreeze and its role in vehicle maintenance. Niall Motormouth Jenkins debunks the myth of 'lifetime antifreeze' and emphasizes the importance of regular testing and replacement to prevent costly engine failures. He shares insights on testing methods, the significance of freeze and boiling points, and the dangers of using tap water in cooling systems. With humor and practical advice, this episode is a valuable resource for anyone looking to maintain their vehicle's cooling system effectively.

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Technical Too Afraid to Ask
Term

antifreeze

"Yep, I think I heard it. What the heck is that? Antifreeze, car antifreeze. We're going to break it down for you."

Antifreeze is a special liquid that helps keep your car's engine cool and prevents it from freezing when it's cold outside.

Term

frozen coolant

"Frozen coolant means a cracked engine block, and that's a Christmas gift you don't want"

If the coolant in your car freezes, it can break parts of the engine, which is very expensive to fix. It's important to check that your coolant is mixed correctly for the weather.

Term

cooling system

"...but I'm not going to because here's what you got to know. And I'll follow up this episode with another episode of our podcast on iHeart platforms, all the platforms, Spotify, Instagram...the vehicles cooling system, the number one most neglected system on every single automobile..."

The cooling system helps keep the engine from getting too hot. It uses parts like the radiator and water pump to keep everything at the right temperature.

Car

Jeep Wrangler

"...is about. So we've been working on a 1997 Jeep TJ Wrangler that was gifted to us from the Wrecking Yard. And..."

The Jeep Wrangler is a tough, off-road vehicle that can handle rough terrain, making it popular for outdoor adventures. The 1997 model is part of a series that many people love because it looks cool and can go almost anywhere. It's often talked about because of its fun driving experience and ability to customize it.

Term

freeze point

"...Here's what we're checking for. We're checking for the freeze point. And that's not the only thing. We have to test your vehicle's antifreeze for more than just how cold can my car go before it freezes up..."

The freeze point is the temperature at which something turns into ice. In cars, it's important to know this for the liquid that keeps the engine cool, so it doesn't freeze and cause problems.

Term

cracked engine block

"...frozen coolant means a cracked engine block. And that is not something you want to have to deal with..."

A cracked engine block means there's a break in the part of the engine that holds everything together. This can cause big problems, like leaks and overheating, and can be very expensive to fix.

Term

pH balance

"...we're looking for the pH balance alkalinity and acid corrosion level. Here's what we discovered about the Dexcool..."

pH balance is a way to measure how acidic or basic a liquid is. In coolant, it's important to keep it balanced to avoid damage to the engine.

Term

Dexcool

"Here's what we discovered about the Dexcool back in the early 90s. It was good till it wasn't."

Dexcool is a special kind of coolant used in some cars to help keep the engine cool. It's different from regular antifreeze and is designed to last longer.

Part

head gasket

"...we were dealing with head gaskets, failed intake gaskets, cylinder heads being etched from the acid..."

The head gasket is a part that sits between the engine block and the top part of the engine. It keeps the oil and coolant from mixing together, which is really important for the engine to work properly.

Part

intake gasket

"...failed intake gaskets, cylinder heads being etched from the acid..."

The intake gasket is a seal that helps keep air and fuel in the right place in the engine. If it breaks, it can cause problems with how the engine runs.

Part

cylinder head

"...cylinder heads being etched from the acid was actually eating the aluminum to the cylinder heads..."

The cylinder head is the top part of the engine where the fuel burns to create power. If it gets damaged, it can cause big problems for the engine.

Term

500 liter barrels

"...I bought antifreeze in bulk. Anyways, because the jugs, they just hang around and they're terrible to hang on to. So we used to buy it in 500 liter barrels..."

A 500 liter barrel is a big container that holds a lot of liquid, like antifreeze. It's useful for buying in large amounts instead of many small bottles.

Term

distilled water

"...you have to use distilled or filtered water or if you know for sure it's not coming out of a municipal tap..."

Distilled water is very clean water that has had all the dirt and chemicals removed. It's better for your car because it won't cause any problems in the engine.

Term

tap water

"...you cannot mix the antifreeze or put tap water into your vehicle's cooling system..."

Tap water is the regular water that comes from your sink. It's not good for your car because it can have chemicals that might damage the engine.

Term

severe service vehicle

"your vehicle is classified as severe service vehicle. It needs more service than less..."

A severe service vehicle is a car that needs more maintenance because it's used in tough conditions, like short trips or carrying heavy loads.

Concept

junkyard rescue

"Jeep TJ Wrangler Sport that put it in the junkyard. So we rescued it. It's what we call our 97 Jeep TJ Wrangler Rescue."

A junkyard rescue is when someone takes a car that was thrown away or damaged and fixes it up. People do this to save old cars and make them usable again.

Term

upgrades

"We're doing some upgrades to it right now. Every all the mechanicals are all done."

Upgrades are changes made to a car to make it better. This can mean improving how it drives or making it look nicer.

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