Cooling System Repair // South Dakota
Overheating destroys diesel engines fast. We pressure-test the system, find the leak, and fix it - radiator, water pump, thermostat, hoses, EGR cooler, or fan clutch.
Symptoms We See
- ▸Truck overheats under load
- ▸Coolant loss with no visible leak
- ▸Fan clutch stuck on or off
- ▸White smoke from exhaust
- ▸Heater not working properly
What's Included
- ✓Cooling system pressure test
- ✓Radiator repair or replacement
- ✓Water pump and thermostat service
- ✓Hose, clamp, and belt replacement
- ✓Coolant flush and refill
Why It Matters
A two-hundred-dollar thermostat fix that gets ignored turns into a thirty-thousand-dollar overhaul. Cooling system problems should be caught at the first warning sign.
Why Choose 1776
Dealer-Level Diagnostics
Real scan tools for every major heavy-duty platform - not generic readers.
Experienced Techs
Heavy-duty diesel specialists who've seen it before and know how to fix it right.
Honest Communication
Clear estimates, no upsells, and a call before any scope change.
Fast Turnaround
Six bays and parts relationships that keep your truck moving, not parked.
Frequently Asked Questions
How often should I flush coolant?+
Every 250k miles or per the engine manufacturer's spec - sooner if testing shows contamination.
Can you repair an EGR cooler leak?+
Yes - diagnosis, replacement, or delete (where legal) for off-road equipment.
What if my radiator is plugged?+
We can clean, repair, or replace - we'll tell you which makes sense for your truck.
Related Services
Engine Repair, Rebuild & Overhaul
In-frame and out-of-frame overhauls for Cat, Cummins, Paccar, Detroit.
Learn More →HVAC & Exhaust Repair
AC and heater service plus DPF, EGR, and regen repair.
Learn More →Preventive Maintenance
Scheduled PM service that keeps trucks out of the breakdown lane.
Learn More →Truck Down? Call Now.
Give us your fault codes or symptoms. You get a straight answer in plain language.