Overheating Emergency? Stop Immediately
We Fix Cooling System Failures Same Day
Coolant leaking? Temperature gauge climbing? Engine alarming or derating? Stop the truck — overheating can destroy a diesel engine in minutes. We provide same-day cooling system diagnostics and repair for semi-trucks and heavy-duty fleets across the Dallas–Fort Worth area.
Salazar Semi-Truck Repair Inc. – 2323 Chalk Hill Rd, Dallas, TX 75212
Why Drivers & Fleets Trust Us With Overheating Emergencies
- Emergency-focused shop: We handle overheating, coolant leaks and roadside breakdowns every day.
- Heavy-duty only: Semi-trucks, box trucks and commercial fleets — no passenger cars.
- Engine protection mindset: Our priority is to protect your engine, not just top off coolant.
- Dealer-level diagnostics: We use OEM-capable tools to monitor temps, fan control and derate conditions.
- Fleet-first workflow: Unit numbers, mileage, photos, notes and PM recommendations on every job.
- EFS available: For approved fleet accounts operating in DFW.
Overheating Is the #1 Silent Engine Killer in Heavy Trucks
A heavy-duty diesel engine is built to work hard — but only within the right temperature range. When a truck overheats, you risk:
- Blown head gasket and coolant in the cylinders.
- Warped cylinder head and expensive machine work.
- Turbocharger damage from extreme heat.
- Derate or shutdown in the middle of a load.
- Long-term reliability issues that show up months later.
A simple coolant leak or bad hose can quickly become a multi-thousand-dollar engine repair. That’s why we treat overheating as a high-risk emergency, not a simple “top off and go”.
Common Cooling System Failures We Repair Every Day
- Coolant leaks: hoses, clamps, pipes, plastic fittings and reservoir cracks.
- Radiator failures: core leaks, end tank separation, clogged fins and internal blockage.
- Water pump issues: shaft seal leaks, bearing failure and impeller damage.
- Thermostat problems: stuck open or stuck closed causing overheating or poor temp control.
- Fan clutch & fan drive: fan not engaging, running constantly or failing under load.
- Coolant contamination: oil in coolant, rust, scale or incorrect coolant mix.
Symptoms That Mean You Need Cooling System Repair Now
- Temperature gauge climbing above normal or into the red zone.
- Coolant warning light or “engine protection” message on the dash.
- Visible coolant leak under the truck or around the engine bay.
- Steam or hot smell coming from under the hood.
- Frequent need to add coolant with no visible leak.
- Engine derate, shutdown or reduced power under load.
Any of these symptoms means the unit should be inspected before going back on the highway.
Our Emergency Cooling System Repair Process
- Triage call: You tell us what you see on the gauges, what you smell and where you notice coolant.
- Safety decision: We help you decide if the truck can be driven to the shop or must be towed.
- Pressure & leak tests: We pressure test the system, trace leaks and inspect hoses, radiator and water pump.
- Component diagnosis: We verify fan clutch operation, thermostat function and coolant flow.
- Clear estimate: You receive a written estimate before we replace major components.
- Repair & refill: We fix leaks, replace failed parts and refill with the correct coolant spec.
- Verification road test: We confirm proper operating temperature and no new leaks.
- Fleet-ready report: Photos, notes and recommendations to keep this failure from repeating.
For Drivers
Tell us exactly what the gauge is doing, what warnings you see and where you notice coolant. We translate your description into a real diagnosis and tell you if it’s safe to move or not. No complicated shop talk — we keep it clear and simple.
For Dispatchers
You receive ETAs, photos, notes and repair summaries so you can reroute freight, update customers and make fast decisions without guessing what’s really happening with the unit.
For Fleet Managers
Every job can include unit number, mileage, failure cause, replaced parts and PM recommendations. Overheating is often a symptom of neglected maintenance, incorrect coolant or worn components — we help you turn one breakdown into data that protects the rest of your fleet.
An Overheating Event Can Total a Diesel Engine
Cooling system problems don’t just stop a truck — they can ruin a good engine. A minor coolant leak can lead to a blown head gasket, cracked head, turbo damage and weeks of downtime. Fixing the cooling system now is always cheaper than rebuilding or replacing an engine later.
Cooling System & Overheating – Frequently Asked Questions
No. Continuing to drive while the engine is overheating can cause severe damage, including blown head gaskets, warped heads and turbo failure. It’s safer to pull over, let it cool and call for help.
Park in a safe place, avoid opening the cap while the system is hot and note where the leak seems to come from. Then call a heavy-duty cooling system specialist to inspect the truck before putting it back under load.
Adding coolant without fixing the leak is a temporary band-aid that can fail at the worst moment. The leak will usually get worse, and the engine can overheat again, causing far more damage and downtime.
Simple hose or clamp repairs can often be completed within a few hours. Radiator, water pump or fan clutch replacement may take longer depending on parts and access. We always focus on getting the unit safely back on the road as soon as possible.
Yes. Based on your routes, loads and current failure patterns, we can recommend a customized cooling system inspection and replacement schedule to reduce overheating events and protect engines.
Get Same-Day Cooling System Repair for Semi-Trucks in Dallas, TX
Don’t let an overheating event turn into an engine rebuild. Call now or drive directly to our shop. We’ll diagnose your cooling system, stop the leak and get your truck back to work.
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