VIDEO: Pressure And Heat: Replacing The Weakest Link

VIDEO: Pressure And Heat: Replacing The Weakest Link

All the coolant hoses should be replaced at the same time. This video is sponsored by Continental.

Most late-model cars and trucks are designed to operate at 18 to 21 PSI or less. So most radiator and heater hoses never see the high side of 21 PSI, even if the engine runs hot and overheats. The spring-loaded valve inside the radiator cap will open at its maximum rated pressure and vent steam and coolant to relieve pressure.

Most coolant hoses can safely handle a maximum working pressure of 30 to 40 PSI, which is double what it might see in the real world. Of greater concern is the ability of the hose material to resist deterioration from heat and chemical attack.

The coolant that circulates inside the radiator and heater hoses is usually between 195 to 220 degrees F when the engine has reached normal operating temperature. Quality radiator and heater hoses made of EPDM can usually handle operating temperatures in excess of 300 degrees Fahrenheit. But these are best-case scenarios that do not take into account a hose that has lived a hard life under the hood of a vehicle for thousands of miles.

Most original equipment coolant hoses made of EPDM should easily last up to 10 years or more in normal service. So why should customers expect anything less from an aftermarket replacement hose?

The 60,000/90,000 rule is always a good idea. Start the belt and hose inspection process as early as 60,000 miles. A good opportunity to do this is at every oil change as oil changes are much more frequent than coolant changes. And then plan on hose replacement at 90,000 miles or at least give it consideration.

If a radiator or heater hose has failed, chances are the other hoses are also reaching the end of the road and may soon fail too. For this reason, all of the coolant hoses should be replaced at the same time. You only have to drain and refill the system once (which can be a pain on many late model cars due to air entrapment), and your customer will have the peace of mind that there shouldn’t be any more hose failures for years to come. The coolant should also be changed if it is more than five years old, And, replacing the thermostat is a good idea to prevent overheating problems down the road. The radiator cap should also be inspected and replaced if it leaks, or fails to hold its rated pressure.

This video is sponsored by Continental.

You May Also Like

EV Safety Basics on the Shop Floor – Part I

It’s critical to utilize OEM service information and procedures for each and every hybrid or EV.

Electric vehicle safety — it’s a topic that’s on a lot of our minds. High voltage can be frightening because it can kill, but it shouldn’t scare you away. The reality is EV technology is a safe technology. As long as you understand it, respect it, and follow established safety guidelines for EV service. Let’s look at how to establish safety basics in your shop.

Autel MaxiSYS Ultra Enhances Efficiency At Mighty Auto Pro

Time is money in vehicle repair, and the Autel MaxiSYS Ultra is all about enhancing technicians’ diagnostic prowess.

Empowering the Automotive Aftermarket Through Collaboration

Distributors, manufacturers, training institutions, associations and service providers all help automotive professionals stay ahead in a market that is constantly evolving with new technologies, trends and customer demands.

Understanding LSPI & Engine Oil

Using the correct manufacturer-recommended oil is crucial for peak performance and long-lasting engine health.

Randy Breaux, Group President, GPC North America, Talks to AMN Drivetime

At NAPA, “Breaux Knows” business relationships, ABCs to avoid, and serving the automotive professional.

Other Posts
Serpentine Belt and Drive System Maintenance

Properly maintaining the entire drive system prevents premature belt wear and system failure, ensuring customer satisfaction and vehicle reliability.

How Modern Car Sensors Optimize Performance and Emissions

Learn how Standard ensures accuracy, speed, and durability in their sensors to maximize engine performance and efficiency.

Do EVs Require Special Brake Pads?

Proper brake pad selection is crucial for EVs to ensure consistent stopping power and long pad life.

Five Tips for your Next Wheel Bearing Job

These practical tips are designed to save you time and frustration, ensuring a smooth, noise-free outcome for your customers.