When a truck is losing coolant but shows no obvious signs of leakage, diagnosing the issue can feel like finding a needle in a haystack. Recently, a customer came to Sam’s Roadside Service & Towing with exactly this problem — persistent coolant loss with no visible drips or puddles.
Our team took on the challenge and tracked down the culprit: a hidden radiator leak.
The Challenge: No Visible Coolant Leak
Coolant loss without visible signs is tricky because small leaks often:
Evaporate before leaving any trace
Occur in hard-to-see areas while the engine is hot
Only appear under pressure
If left unresolved, a radiator leak can lead to engine overheating, expensive mobile truck repair, and costly downtime.
Step 1 – Thorough Cooling System Inspection
The first step was to bring the truck into our full-service diesel repair shop for a complete inspection. Our technicians performed a cooling system pressure test, simulating operating conditions without running the engine.
This method allowed us to safely inspect for escaping coolant — and sure enough, we spotted a small leak on the radiator, hidden behind other components.
Step 2 – Removing and Replacing the Faulty Radiator
Once we pinpointed the radiator leak, we moved quickly to prevent further coolant loss. The process included:
Drain and Secure – Safely drained the cooling system.
Component Removal – Accessed the hidden area by removing obstructions.
Radiator Replacement – Installed a brand-new OEM radiator.
Hose and Clamp Check – Replaced worn connections for maximum reliability.
Step 3 – System Refill and Final Testing
After the new radiator was installed, we:
Refilled the cooling system with the correct coolant mixture
Re-ran the pressure test to ensure no leaks remained
Performed a same-day turnaround, getting the truck back on the road without delay
Roadside Support You Can Count On
No matter the situation, our reliable roadside assistance ensures you get the help you need, fast. From breakdowns to emergencies, we’re here 24/7 to keep you moving.
The Result: Another Satisfied Customer
Our customer was back on the road the same day with a reliable cooling system, avoiding breakdowns and costly roadside assistance in the future.
Why Choose Sam’s Roadside Service & Towing?
From emergency truck repair in Houston to heavy-duty towing, we’re here to handle breakdowns quickly and effectively. Our experienced technicians have the right tools and know-how to find even the most hidden issues — and fix them fast.From emergency truck repair in Houston to heavy-duty towing, we’re here to handle breakdowns quickly and effectively. Our experienced technicians have the right tools and know-how to find even the most hidden issues — and fix them fast.From emergency truck repair in Houston to heavy-duty towing, we’re here to handle breakdowns quickly and effectively. Our experienced technicians have the right tools and know-how to find even the most hidden issues — and fix them fast.
Need Help with a Radiator Leak or Coolant Loss?
If your truck is losing coolant and you can’t find the source, don’t risk engine damage.
📞 Contact us today for fast, reliable repairs.
