Truck Coolant System Repair Services in Seguin, TX

Truck Radiator Repair Shop in Seguin, TX

The cooling system is a critical line of defense against catastrophic engine damage, especially when dealing with the extreme Texas heat. From the radiator to the fan clutch, every component must work in harmony to keep your operating temperatures safe under pressure.

At H&H Diesel Service, we offer complete heavy-duty cooling system services, including:

• Radiator repair and replacement
• Coolant flush and fill
• Water pump repairs
• Thermostat replacement
• Coolant reservoir and sensor service
• Heater core replacement
• Fan clutch diagnostics and repair
• Coolant line and seal leak detection

If you're noticing coolant leaks, fluctuating temperatures, or the smell of antifreeze under the hood, it’s time to take action. Engine overheating isn’t just a warning sign—it’s a direct threat to your truck’s reliability. The longer you wait, the higher the repair bill climbs. If your coolant light's on or the temp gauge is rising, don’t risk it—bring your truck to our radiator repair shop today.

Experience the H&H Difference

Fast Repairs, Even During Busy Seasons: With six oversized bays and eight full-time techs, you get the prompt service your schedule demands—even during peak times.

Expertise That Covers All Bases: You’re trusting specialists trained on systems from PACCAR, Terex, Kubota, and more. From Class 8 trucks to custom rigs, we’ve got your cooling system handled.

Clarity from Start to Finish: You get honest answers and clear timelines. We explain what’s wrong, how we’ll fix it, and exactly what it will cost. No surprises, no games.

Repairs That Come with Peace of Mind: Every repair includes a 30-day workmanship warranty, and we honor all manufacturer-backed parts warranties—so you can focus on the road, not your radiator.

Mobile Repairs: Can’t make it to the shop? We offer dependable roadside assistance and scheduled mobile repairs to a 25-mile radius of Seguin, TX.

Contact Us About Coolant System Repair Now: Call 210-332-5821!

If your cooling system isn’t performing like it should, don’t gamble with your engine. Call 210-332-5821 now and get expert service that keeps your truck running strong, even under pressure. At H&H Diesel Service, your uptime is our mission. We get the job done right the first time with the team you can count on.

FAQs

What Areas Do You Serve for Heavy-Duty Coolant System Repair?

We’re located at 7310 I-10 West, Seguin, TX 78155, near the I-10 intersection. We also proudly serve San Antonio, TX; Lockhart, TX; Luling, TX; New Braunfels, TX; San Marcos, TX; Cibolo, TX; Schertz, TX; Marion, TX; McQueeney, TX; Geronimo, TX; New Berlin, TX; Santa Clara, TX; and Lake Dunlap, TX.

What Are the Common Signs of a Malfunctioning Cooling System?

Common signs of a malfunctioning cooling system in heavy-duty diesel vehicles include engine overheating, coolant leaks, low coolant levels, steam from the engine, and warning lights. Poor cabin heat and fluctuating temperature gauges may also indicate cooling issues requiring immediate inspection and repair.

How Do You Detect Where a Coolant Leak Is Coming From?

To detect a coolant leak in a heavy-duty diesel vehicle, inspect hoses, the radiator, water pump, and coolant reservoir for visible drips or stains. Use a pressure tester to pressurize the system and identify leaks. UV dye and a blacklight can also help locate hidden leaks accurately.

How Can I Get Heavy-Duty Coolant System Repair?

Just call 210-332-5821. We’ll inspect your system, explain exactly what’s going on, and perform the repairs needed to keep you on the road—with no guesswork involved.