5 Things: Cooling System Bogeyman That Can Destroy Your Road Trip
About this episode
The hosts kick off with workshop-style banter, then pivot to the “cooling system boogeyman”—why cooling systems are often the most neglected car system and how heat can turn small issues into road-trip killers. They frame cooling as a money-saver topic: catching problems early prevents overheating, major engine damage, and expensive repairs. The show also includes a summer tech note about transmissions “sweating” in hot weather, plus listener Q&A logistics and plug-ins for local partners and the podcast’s YouTube learning series.
Your Cooling system is more than just antifreeze in a radiator, It is a complete system that works together to protect your engine, transmission, and your travel plans.
In this episode of Motormouth's Morning Drive, Nile Jenkins breaks down 5 Things every vehicle owner needs to understand about the cooling system Bogeyman:
1) Why overall cooling system condition matters more than one single component
2) How hidden failures can sneak up and leave you stranded
3) why the 'cooling system Ninja" can strike when you least expect it.
4) Why radiator age matters even when there are no visible leaks.
5) Why thermostats, water pumps, hoses, clamps, belts and belt condition must be inspected before failure happens.
Remember: vehicles usually do not warn you before a cooling system failure becomes expensive. There may be no warning light before damage occurs.
Maintenance Matters. Mileage Matters. Age Matters. Whatever comes first.
Knowledge is not luck - luck is Labouring Under Correct Knowledge.
#CoolingSystem #VehicleMaintenance #CaCareTips
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Honda Civic DX two-door hatchback
"and that's where following a maintenance system will keep that vehicle running just like my own 400,000 kilometers the next one is 300 and just turned over 319,000 kilometers that's our 99 Honda Civic DX two-door hatchback and it has air conditioning so cold you can hang beef in there"
This is a Honda Civic, a very common compact car that’s known for being tough and inexpensive to keep running. The host is pointing to a specific Civic trim/body style (DX, two-door hatchback) as an example of a car that’s lasted a very long time.
The Honda Civic is a long-running compact car line known for durability and low running costs. In this segment, the host specifically mentions a Honda Civic DX two-door hatchback with air conditioning, using it as an example of a high-mileage car that still works well.
antifreeze
"wanted to bring that right to the forefront folks because a lot of you think it's just about antifreeze ... it's cooling system is not just about antifreeze"
Antifreeze is the fluid in your radiator/cooling system that helps keep the engine from freezing in winter and boiling over in heat. The key point here is that not all antifreeze is equally good, even if it’s marketed as long-lasting.
Antifreeze is the coolant additive (often mixed with water) that helps prevent freezing in cold weather and raises the coolant’s boiling resistance. In this segment, the host emphasizes that antifreeze quality and chemistry matter, not just the label or claimed service life.
cooling system
"because it's cooling system is not just about antifreeze that's just one of the items that makes up the cooling system so it's not all your cooling systems"
Your cooling system is how the car prevents the engine from overheating. It’s not only the coolant/antifreeze—there are other parts that help move heat out of the engine.
A vehicle’s cooling system is the network that moves coolant through the engine and radiator to keep temperatures in a safe range. It includes more than just antifreeze—its hoses, radiator, water pump, thermostat, and coolant condition all work together.
boiling point
"we need to test that on a regular basis for the boiling point and the freeze point the acid corrosion level ph balance and alkalinity"
The boiling point is the temperature where the coolant starts to boil. If your coolant boils too easily, the engine can overheat.
The boiling point is the temperature at which the coolant changes from liquid to vapor. Coolant with an appropriate boiling point helps prevent overheating and vapor lock during hard driving or hot ambient conditions.
freeze point
"we need to test that on a regular basis for the boiling point and the freeze point the acid corrosion level ph balance and alkalinity"
The freeze point is the temperature where the coolant would start to freeze. If it freezes, it can damage the engine and radiator.
The freeze point is the temperature where coolant will start to solidify. A sufficiently low freeze point helps protect the engine and radiator from cracking during cold weather.
pH balance
"we need to test that on a regular basis for the boiling point and the freeze point the acid corrosion level ph balance and alkalinity"
pH balance is a way to describe how acidic or basic the coolant is. The right balance helps prevent rust and corrosion inside the engine’s cooling passages.
pH balance describes how acidic or basic the coolant is, which strongly affects corrosion protection. Coolants are formulated with inhibitors that keep pH in a protective range; when pH drifts, corrosion risk rises.
acid corrosion level
"we need to test that on a regular basis for the boiling point and the freeze point the acid corrosion level ph balance and alkalinity"
This is a measure of how “corrosive” the coolant is. If it’s too acidic, it can eat away at metal parts in the cooling system over time.
Acid corrosion level refers to how acidic the coolant is and how aggressively it can corrode metal surfaces inside the cooling system. Higher corrosiveness can shorten the life of components like the radiator, water pump, and internal engine passages.
alkalinity
"we need to test that on a regular basis for the boiling point and the freeze point the acid corrosion level ph balance and alkalinity"
Alkalinity is how well the coolant can “hold steady” instead of becoming too acidic. That helps protect metal parts from corrosion.
Alkalinity is the coolant’s buffering capacity—its ability to resist pH changes. In cooling systems, adequate alkalinity helps maintain corrosion-inhibitor effectiveness over time.
Toyota FJ Cruiser
"taking our 2007 fj cruiser apart at the cooling system level pulled the radiator out thermostat hoses the whole nine yards you need to watch those videos"
The host uses a 2007 Toyota FJ Cruiser as an example of a cooling-system job. They’re saying you sometimes have to take out parts like the radiator and thermostat to figure out what’s wrong.
The Toyota FJ Cruiser is being used as a real-world example of how deep you may need to go when diagnosing a cooling-system problem. The host describes pulling the radiator, thermostat, and hoses to understand what’s happening at the cooling-system level.
2018 Jeep Wrangler JK
"we had a two uh we did shot a video on a 2018 Jeep uh i think it was a Jeep Wrangler JK ... that's the first time i've ever seen um an onboard computer flag a thermostat and put the service light on"
The host talks about a 2018 Jeep Wrangler JK where the car’s computer noticed a thermostat problem. Instead of only being found by a mechanic, it triggered a warning light to tell you something’s wrong.
The Jeep Wrangler JK (2018) is referenced as the first time the host saw an onboard system directly flag a thermostat issue. The point is that the vehicle’s electronics can detect abnormal cooling behavior and illuminate a service warning.
ALDL connector
"in most cases it's up to the tech to go in through the ALDL connector so put the scan tool on there the engine analyzer not the little handheld unit"
The ALDL connector is a plug used to connect diagnostic equipment to the car. It lets a mechanic read detailed information from the car’s computer, especially when troubleshooting cooling problems.
The ALDL connector is a diagnostic interface used on certain vehicles to communicate with the vehicle’s engine control system. The host contrasts it with using a basic handheld device, saying a full scan tool/analyzer is needed to see cooling-system readings.
scan tool
"so put the scan tool on there the engine analyzer not the little handheld unit a full analyzer so we can see"
A scan tool is what mechanics plug in to read the car’s computer messages. It can show what the cooling system is doing so you can diagnose the problem correctly.
A scan tool is a diagnostic device that reads data and trouble codes from the vehicle’s onboard computer. The host emphasizes using a full analyzer to monitor cooling-system temperature/voltage rather than relying on a small handheld unit.
serpentine drive belt
"belts and hoses they're important they house the coolant the water the water pump is driven by the belt the serpentine drive belt that baby pops off your engine goes into super overheat"
A serpentine belt is a single belt that powers important engine accessories. If it comes off, the coolant pump can stop, and the engine can overheat fast.
The serpentine drive belt is the long, multi-rib belt that routes power from the engine to accessories like the water pump. If it pops off, the water pump stops circulating coolant, and the engine can overheat quickly.
radiator
"it ain't just the radiator age that takes it out it's that the radiators they plug up with calcium from the bottom up so we can't see it"
The radiator is the heat exchanger that dumps heat from the coolant to the air. The host warns that radiators can clog internally—especially from the bottom up—reducing cooling capacity without necessarily looking dirty from the top.
calcium
"it's that the radiators they plug up with calcium from the bottom up so we can't see it"
Calcium buildup is mineral scale that can collect inside the cooling system. It can block the radiator’s passages so coolant can’t cool the engine as well.
In cooling systems, calcium buildup refers to mineral deposits that form when coolant and water chemistry allow scale to precipitate. The host claims this can plug radiator passages from the bottom up, reducing heat transfer and cooling capacity.
service light
"you start losing cooling system capacity and there's no service light for that ding ding ding"
A service light is a dashboard warning that tells you something needs attention. The host is saying cooling issues can get bad without that light coming on.
A “service light” is a dashboard warning/indicator that alerts the driver to a detected fault or maintenance issue. The host’s point is that some cooling problems (like reduced radiator flow/heat transfer) may not trigger a service light before overheating risk increases.
Dodge caravans
"he said how we're getting high mileage out of them is every hundred k whether it's leaking or not the radiator comes out we put a brand new radiator in each and every one of those service fans"
The host is referring to Dodge Caravans used as service vehicles. The idea is that replacing the radiator regularly helped prevent overheating and kept them going for a very long time.
The host specifically calls out “Dodge caravans” as the long-running service vehicles in the test. The segment claims a maintenance routine of replacing the radiator every 100,000 kilometers helped achieve extremely high total mileage.
thermostat
"number five the thermostat can and water pump and hoses can let go any time after a hundred k ... it can slam shut at any time or stick wide open without notice"
The thermostat is like a temperature-controlled gate for coolant. If it fails, the engine may overheat (stuck closed) or not cool/heat correctly (stuck open).
The thermostat regulates coolant flow by opening and closing based on temperature. If it sticks closed, the engine can overheat quickly; if it sticks open, the engine may run too cool and the system can still fail to manage temperature properly.
water pump
"thermostats we used to replace every 24 months ... water pump same thing it's good today tomorrow i'm leaving antifreeze everywhere i go it's dripping from somewhere that's the water pump signal that it has failed completely"
The water pump moves coolant around the engine. If it fails, coolant can stop flowing and the engine can overheat—often you’ll see coolant leaking or dripping.
The water pump circulates coolant through the engine and radiator. When it fails, coolant flow stops and the engine can overheat; the speaker also describes a common symptom: coolant dripping from the pump area.
hoses
"thermostat can and water pump and hoses can let go any time after a hundred k ... they rot from the inside out not the outside in so you can't see visually what's going on"
Hoses move coolant through the cooling system. Over time heat and sun can make them break down internally, causing leaks even if they don’t look bad outside.
Cooling hoses carry coolant between the engine, radiator, and thermostat. Heat and UV exposure degrade rubber from the inside out, so leaks can develop without obvious external damage.
Gates Canada
"because belts and hoses by gates canada major company that produces those components belts and hoses are good for two years regardless of mileage"
Gates is a company that makes car belts and hoses. The host brings it up to talk about how these parts wear out over time from heat and sun.
Gates is a major manufacturer of belts and hoses for automotive applications. The speaker cites Gates Canada to support the idea that these rubber components have a limited service life driven by heat and UV exposure.
clamps
"hoses i just talked about that as well clamps they rot they rust they get weak and that's where cooling system leaks come from"
Clamps hold the coolant hoses tight to the connections. If they rust or weaken, they can let coolant leak out.
Hose clamps secure cooling hoses to fittings. Corrosion and weakening can cause clamps to lose tension, leading to cooling system leaks.
serpentine belt
"belts and hoses by gates canada major company that produces those components ... usually until it's left on the roadway on the 400 series highways i can't tell you how many times i've seen somebody serpentine belt laying on a 400 series highway"
The serpentine belt is the main belt that powers important engine accessories. If it breaks or falls off, the car can lose cooling and you can get stranded.
A serpentine belt is the single multi-rib belt that drives multiple accessories (commonly including the alternator and often the water pump on many engines). If it fails or comes off, the cooling system can stop functioning and the engine can overheat.
400 series highways
"usually until it's left on the roadway on the 400 series highways i can't tell you how many times i've seen somebody serpentine belt laying on a 400 series highway"
The host mentions Canada’s 400-series highways to make a point: if your belt or cooling system fails, you can end up stranded on a busy highway fast.
The speaker references Canada’s “400-series” highways as a common place to get stuck when a belt or cooling component fails. It’s used to emphasize how quickly a failure can turn into a roadside emergency.
automatic transmission
"i yes you're cooking the cooling system in the engine you're cooking your automatic transmission"
An automatic transmission is the part that shifts gears automatically. It uses fluid to keep everything lubricated and cool, so if the fluid gets dirty or overheats, problems can start sooner.
An automatic transmission is the gearbox that changes gears for you using hydraulic control and sensors. It relies on transmission fluid for lubrication and cooling, so heat and dirty fluid can accelerate wear.
stop and go traffic
"transmission work harder especially in stop and go traffic if your fluid's dark or smells burnt"
Stop-and-go traffic is when you’re constantly slowing down and speeding up. It makes the car run hotter for longer, which can be harder on the transmission and its fluid.
Stop-and-go traffic increases heat load because the engine and transmission spend more time idling and operating at low speeds. That makes cooling demands higher and can stress fluid quality over time.
CVT transmission
"if you have a nissan rogue with a cvt transmission you need to be changing that transmission oil every 30 000 miles"
A CVT is a type of automatic transmission that changes “gears” smoothly without fixed steps. It relies on the right fluid to work correctly, so old or overheated fluid can cause problems.
A CVT (continuously variable transmission) uses a belt-and-pulley system to provide smooth, stepless gear changes. Because it depends heavily on the correct fluid and operating temperatures, neglected fluid service can lead to accelerated wear and shifting/response issues.
nissan rogue
"it's time to change it i don't care whether it's synthetic or not if you have a nissan rogue with a cvt transmission you need to be changing that transmission oil"
The Nissan Rogue is a common family crossover. In this segment, the host warns that if your Rogue has a CVT, you should keep up with transmission fluid changes because heat and dirty fluid can lead to expensive issues.
The Nissan Rogue is a popular crossover, and this episode specifically calls out its CVT-equipped versions as being sensitive to transmission fluid condition. The key point is that heat and degraded fluid can make the CVT work harder, increasing the risk of transmission problems.
transmission oil
"it's time to change it i don't care whether it's synthetic or not if you have a nissan rogue with a cvt transmission you need to be changing that transmission oil"
Transmission oil is the fluid that keeps the transmission’s moving parts from grinding and overheating. If it turns dark or smells burnt, it usually means it’s worn out and not protecting the transmission well anymore.
Transmission oil (fluid) lubricates internal gears and clutches and also helps carry heat away. Dark, burnt-smelling fluid is a sign the fluid has degraded and may no longer protect the transmission.
rebuild
"some of them go as high as 16 000 the cheap ones are around 6000 to rebuild so don't wait until the shifts get clunky"
A rebuild means the transmission gets taken apart and repaired with replacement parts. It’s usually much more expensive than regular maintenance, so it’s better to fix the problem early.
A transmission rebuild is a major repair where the transmission is disassembled and worn parts are replaced or restored. It’s typically far more expensive than routine fluid service, which is why the host emphasizes not waiting for symptoms.
shifts get clunky
"some of them go as high as 16 000 the cheap ones are around 6000 to rebuild so don't wait until the shifts get clunky your transmission deserves some"
If the transmission starts shifting in a rough or jerky way, that’s a warning sign. It can mean the fluid isn’t doing its job anymore or parts inside are wearing out.
“Clunky” shifting is a symptom that the transmission’s control or internal components may be struggling. It can show up when fluid is degraded, pressure control is off, or wear has progressed enough to affect how smoothly the transmission engages.
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