Cooling System
Repair
Concord, NC
An overheating diesel engine can suffer $15,000–$20,000+ in damage from a single event. CTR's systematic cooling system diagnosis identifies the exact cause — so a $300 thermostat doesn't become a $3,000 head gasket.
Cooling System Repair Experts
The cooling system is the guardian of your engine. When it fails, the consequences are immediate and expensive — warped heads, blown gaskets, cracked liners, seized pistons. A $300 thermostat ignored becomes a $15,000 engine rebuild.
CTR provides complete cooling system diagnosis and repair for all heavy duty diesel engines — Cummins, Detroit, PACCAR, CAT, International, Isuzu. Radiator, water pump, thermostat, EGR cooler, charge air cooler, fan clutch, and coolant service.
Our diagnostic approach uses pressure testing, flow testing, coolant analysis, thermographic imaging, and combustion gas detection to identify the exact cause — not guess at it. All repairs backed by our 3-year, 36,000-mile warranty.
Complete Capability
Radiator, water pump, thermostat, EGR cooler, CAC, fan clutch, coolant service.
Precision Diagnosis
Pressure testing, flow testing, coolant analysis, thermographic imaging, combustion gas detection.
All Engine Platforms
Cummins, Detroit, PACCAR, CAT, International, Isuzu — every cooling system configuration.
3-Year, 36K Warranty
Industry-leading warranty on all cooling system work.
Complete Cooling System Repair Services
Every service starts with accurate diagnosis. Click any service for details.
Commercial truck radiators take tremendous abuse — road debris, vibration fatigue, internal corrosion, and electrolysis. CTR provides complete radiator diagnosis, cleaning, and replacement for all truck platforms.
Warning Signs of Cooling System Failure
Cooling system problems escalate rapidly. A minor issue today becomes catastrophic engine damage tomorrow.
Temperature Gauge Rising
Temperature reading higher than normal operating range. Do not continue driving — pull over safely.
Visible Coolant Leak
Puddle or stream under the truck. Green, pink, or orange fluid. Check coolant level immediately.
White Steam from Exhaust
Possible head gasket or EGR cooler leak allowing coolant into combustion or exhaust.
Low Coolant Level
Requiring frequent top-off indicates a leak — external or internal. Diagnose before it causes overheating.
Sweet Coolant Smell
Ethylene glycol has a sweet smell. If you smell it, coolant is leaking somewhere.
Milky Oil on Dipstick
Coolant mixing with engine oil — head gasket, oil cooler, or liner seal failure. Stop driving immediately.
Do Not Drive an Overheating Truck
Every mile driven while overheating causes progressive engine damage. Pull over safely, shut down, and call CTR at (704) 786-0132. A tow bill is a fraction of the engine damage cost from continued operation.
Fix It Now vs. Fix It Later
Cooling system repairs are always cheaper than the engine damage they prevent.
Written estimates provided before any work begins. All repairs backed by 3-year, 36,000-mile warranty.
Engine Platforms We Service
ISB 6.7, ISL 8.9, ISX/X15, B6.7, L9
DD13, DD15, DD16, Series 60
MX-11, MX-13
C7, C9, C13, C15, 3126
A26, MaxxForce, N13, DT466
4HK1, J05E, J08E
How Cooling Affects Your Aftertreatment System
Poor cooling system health creates a cascade of aftertreatment problems that compound repair costs.
Stuck-Open Thermostat
Engine runs too cool → insufficient exhaust temperature → passive DPF regeneration fails → DPF clogs
EGR Cooler Leak
Coolant enters exhaust → contaminates DPF and SCR catalyst with minerals → requires DPF cleaning or replacement
Overheating
Engine derate reduces power → forced idle or shutdown → lost revenue and potential engine damage
Coolant in Oil
Oil contamination → accelerated bearing and component wear → potential catastrophic engine failure
The Connection: Cooling system health directly affects aftertreatment system function. Fixing cooling problems early prevents expensive aftertreatment failures downstream.
Built for Heavy Duty
CTR's facility on Armentrout Drive has the diagnostic equipment for precision cooling system work — pressure testing, flow testing, coolant analysis, thermographic imaging, and combustion gas detection. Directly off I-85 at Exit 58.
Fleet Cooling System Maintenance
CTR provides fleet cooling system programs — coolant analysis at PM intervals, SCA concentration testing, pressure testing, thermostat verification, and radiator/CAC inspection. Proactive maintenance prevents roadside overheating.
(704) 786-0132
Cooling System Repair Near You
CTR Heavy Duty — Concord
Directly off Interstate 85 at Exit 58. Easy truck access.
Also serving:
Cooling System FAQ
17 common questions about heavy duty cooling system repair.