Fleet Cooling System Maintenance Video Safety Tips
When coolant freezes, it expands and poses a danger to your vehicle's engine block. Here's advice from NHTSA on how to protect your cooling system and avoid vehicle breakdowns in frigid temperatures.

Photo: NHTSA
When coolant freezes, it expands and can possibly damage your vehicle’s engine block. That’s why checking your cooling system is so important in the winter. When temperatures plummet, you certainly don't want to have to deal with a vehicle breakdown.
Here are some tips from the National Highway Traffic Safety Administration:
Make sure you have enough coolant in your vehicle and that it’s designed to withstand the winter temperatures your vehicle might experience.
Refer to the vehicle owner’s manual for specific recommendations on coolant. A 50/50 mix of coolant to water is sufficient for most regions of the country.
Thoroughly check the cooling system for leaks or have your mechanic do it for you.
Check to see if your system has been flushed (draining the system and replacing the coolant). Over time, the rust inhibitors in antifreeze break down and become ineffective. Coolant also needs to be refreshed periodically to remove dirt and rust particles that can clog the cooling system and cause it to fail.
To watch a video on how to ensure your vehicle’s coolant can withstand the winter temperatures your vehicle may encounter, watch the video above.
Originally posted on Automotive Fleet
More Safety

Small Fleets Lag in Telematics Coverage as Industry Moves Beyond Adoption
SambaSafety’s 2026 Telematics Report finds fleets with 10 or fewer vehicles monitor a much smaller share of their vehicles than larger operations, as the industry shifts its focus from collecting data to using it.
Read More →
Back-to-School Traffic Is Not the Risk Fleets Think It Is
Back-to-school traffic does not always mean more crashes. New Empiric Earth data shows why fleets should focus on when and where risk changes.
Read More →
Small Fleet, Big Exposure: How to Reduce Workers’ Comp Risks
For small fleets, one crash can trigger far more than vehicle damage. Here’s how stronger driver safety policies, training, maintenance, and technology can help reduce workers’ comp exposure.
Read More →
Who Makes the Call When Winter Weather Gets Dangerous?
Winter weather can quickly change a small fleet’s plans. Knowing when to reroute, delay, or stop can matter just as much as preparing the vehicles themselves.
Read More →
API Issues Refueling Safety Guidelines
The American Petroleum Institute offers a list of safe vehicle refueling guidelines, including ways to avoid potential problems with static electricity discharges in fall, winter, and early spring.
Read More →
Winter Fleet Prep: Expert Tips to Keep Vehicles Running Smoothly
Cold weather can expose weak batteries, tires, fuel systems, and maintenance gaps fast. Use this winter fleet checklist to prepare trucks and drivers before temperatures drop.
Read More →
8 ADAS Maintenance Tips for Small Business Fleets From Bendix
A dirty camera, bad alignment, or one loose connection could quietly knock your fleet’s ADAS offline. Here’s what Bendix says to check.
Read More →
Developing Budget-Friendly Driver Safety Programs
From driver training and safety meetings to one-on-one coaching and incentive programs, several small fleets share how they have developed a safety culture with their drivers using low- to no-cost resources.
Read More →
A 20-Minute Safety Check for Small Fleets Before Operation Safe Driver Week
No safety department? No problem. Here's a practical checklist small fleet managers can use before Operation Safe Driver Week begins.
Read More →
Why Small Fleets Keep Getting Tripped Up by ELD Compliance
Roadcheck revealed a hard truth: most ELD violations aren't intentional. They're caused by small mistakes that can cost fleets time, money, and trust.
Read More →