An overheating engine can destroy a diesel motor in a matter of minutes. Legacy Road Service provides thorough truck coolant system diagnosis and repair to protect your engine before temperatures climb too far.

Truck Radiator Repair Throughout the Southeast
The cooling system on a heavy-duty diesel truck works harder than most operators realize. Managing heat across long hauls, heavy loads, and extreme weather puts every component under constant stress.
Common warning signs include a rising temperature gauge, visible coolant pooling under the truck, a sweet smell from the engine bay, white exhaust smoke, and engine overheating conditions at idle or under load. Any of these symptoms warrants an immediate inspection.
Our technicians diagnose and repair the full engine cooling system, including:
- Radiator inspection, repair, and replacement for cracks, blockages, and external damage
- Water pump replacement for worn impellers, leaking seals, and failed bearings
- Thermostat replacement for stuck-open or stuck-closed conditions affecting temperature regulation
- Fan clutch inspection and replacement for units that fail to engage under load
- Heater core repair and replacement for internal leaks and restricted flow
- Coolant flush and system refill using the correct antifreeze/coolant specification
What Makes Legacy Road Service Different?
Cooling system repairs need effective diagnosis. Replacing parts without identifying the root cause often leads to the same failure returning within miles. And catching the issue early is far less expensive than dealing with the engine damage that follows if it goes unaddressed.
Reasonable Pricing: Cooling system repairs span a wide range of costs depending on the component involved. Legacy Road Service provides honest, upfront estimates so fleet managers and owner-operators can make informed decisions without pressure.
24/7 Availability: An overheating truck in the middle of a run can't wait until morning. Our around-the-clock availability means we can respond to cooling system emergencies whenever and wherever they happen across the Southeast.
White Glove Service: Every cooling system repair starts with a proper pressure test and diagnostic inspection. We identify the source of the problem before recommending repairs, document all findings, and communicate clearly so you understand exactly what was done and why.
Contact Us About Heavy-Duty Radiator Repair Now: Call 843-867-4234
Overheating can shut down your entire operation without warning. Call 843-867-4234 for coolant system repairs. Legacy Road Service fixes radiators, water pumps, and leaks to keep engines running at proper temperatures.
FAQs
What Areas Do You Serve For Heavy-Duty Truck Coolant System Repair?
As well as Moncks Corner, SC, and throughout the Southeast, we also proudly service the surrounding communities, including Ladson, Goose Creek, Summerville, Sangaree, North Charleston, Mount Pleasant, Charleston, Awendaw, Bonneau Beach, St. Stephen, Hanahan, Holly Hill, Isle of Palms, Sullivan's Island, St. George, Ravenel, Kingstree, Hollywood, Manning, and Folly Beach, SC.
What Is the Major Cause of Cooling System Failure?
The most common cause of cooling system failure in commercial trucks is neglected maintenance, specifically failing to flush and replace coolant on schedule. Degraded coolant loses its corrosion inhibitors, allowing scale and rust to build up inside the radiator, water pump, and engine passages. This restricts flow and accelerates component wear throughout the entire system.
What Are the Common Signs of a Malfunctioning Cooling System?
Common signs include a rising or fluctuating temperature gauge, visible coolant leaks under the truck, white smoke from the exhaust, a sweet smell near the engine, and the heater producing less heat than usual. An engine that overheats at idle but cools down at highway speed often points to a failing fan clutch or a partially blocked radiator.
How Can I Get Heavy-Duty Truck Coolant System Repair?
If you need semi truck coolant system repair in Moncks Corner, SC, or across the Southeast, call Legacy Road Service at 843-867-4234. Our team is available 24/7 and ready to diagnose and repair your cooling system before a small problem turns into a damaged engine.
Heavy-Duty Truck Repairs
We provide professional heavy-duty truck repairs designed to keep your equipment running, your drivers moving, and your downtime to a minimum. With a focus on doing the job right the first time, our structured procedures and experienced technicians deliver results fleet managers can trust.
