Heavy-Duty Truck Repairs

Truck Coolant System Repair Services in San Antonio & Austin, TX

Coolant system not keeping its cool? We provide coolant system services for heavy-duty trucks, medium-duty trucks, fleets, heavy equipment, buses, and trailers in San Antonio and Austin, TX. Trust us to ensure optimal engine performance and longevity.

Diesel mechanic performing coolant system repairs on semi truck

Coolant System Repairs and Services

We specialize in comprehensive coolant system repairs and maintenance to keep your heavy-duty vehicles running smoothly. Here are some of the coolant system services we offer:

  • Coolant Flush: We provide thorough coolant flush services to remove old coolant, contaminants, and debris from the system, preventing corrosion and overheating.
  • Radiator Repair: Our technicians offer radiator repair and replacement to address leaks, cracks, or other issues affecting coolant circulation and engine cooling.
  • Thermostat Replacement: We offer thermostat replacement services to ensure proper regulation of engine temperature, preventing overheating and engine damage.
  • Water Pump Repair: Our team can diagnose and repair issues with the water pump, ensuring efficient coolant circulation and optimal engine cooling.

Reach Out Today!

Ready to schedule coolant system repairs or maintenance for your heavy-duty vehicles? Contact us today at (737) 256-7770 to speak with our knowledgeable team and ensure your fleet stays cool under pressure.

Areas We Serve

In addition to our locations in San Antonio and Austin, we offer services within a 50-mile radius of each shop, including the following areas in Texas: Pflugerville, San Marcos, Cedar Park, Round Rock, Georgetown, Elgin, New Braunfels, Schertz, Seguin, Devine, Pleasanton, Floresville, and many more. We offer expert mobile repairs and roadside assistance for those located in these areas.


What are common signs of coolant system issues?

Common signs of coolant system problems include:

  • Engine overheating
  • Coolant leaks under the vehicle
  • A sweet smell inside the cabin
  • The dashboard temperature gauge reading is higher than normal

If you notice any of these symptoms, it's essential to have your coolant system inspected promptly to prevent engine damage.

How often should I replace my coolant?

For heavy-duty trucks, it's recommended to replace the coolant every 30,000 to 50,000 miles or every two to three years, depending on the manufacturer's recommendations. Regular coolant replacement helps maintain proper engine cooling and prevent corrosion within the cooling system.

How can I get in touch?

You can reach Austin Fleet Services by phone at (737) 256-7770. Our friendly team is available to assist you with scheduling coolant system repairs or answering any questions you may have about our services.

Why Choose Austin Fleet Services?

We can come to you!
Our Patented Service Vehicles are specially designed and equipped to perform 85% of all vehicle maintenance and repair requirements on site.


Professional Light to Heavy-Duty Truck Repair Services

From axle repair to exhaust systems, diesel engines to transmissions, our technicians have the expertise to handle every repair job with precision and efficiency. Get in touch today for service in-shop in San Antonio & Austin, Texas. Or via mobile service in the surrounding areas.

Don't Take our word for it —
Read our reviews

"William is a awesome guy. He did a great job. Called about the tandem axle not sliding and helps me fixed some other little issue. I definitely recommend austin fleet services"

Jackson Epalle

"These guys are great, had an emergency with a DEF pump on a black Friday, only shop that picked up the phone, took my driver in immediately and didn't give me the runaround like most do now. I asked not to diagnose anything and just change the pump. Truck back on the road in 3-4 hours and saved us at least 3 days waiting for another shop to open. Definitely coming back here next time our  trucks are in the area!"

Vlad Supron

"Outstanding experience with AFS and George, their knowledgeable mechanic who replaced my valve cover gasket. My vehicle is running smoother than ever. Thank you AFS!"

Bianca Martinez

Contact Us

Get in touch with Austin Fleet Services today to schedule service in-shop in San Antonio or Austin/Pflugerville, or via mobile service in the surrounding areas.