# Cooling System Pressure Test and Flush in Corona, CA

Canonical: https://boxtruckrepairshop.com/services/mechanical-drivetrain/cooling-system/
Business: Box Truck Repair Shop, Yorba Linda, CA. Serving Corona, California.
Phone: (714) 909-1844 | Email: info@ocrvcenter.com

Inland Empire summer heat is hard on box trucks, so we service cooling systems completely in our Yorba Linda shop to stop Corona fleets from overheating on the 91. We pressure-test, flush, and refill the system, replace radiators, water pumps, thermostats, and hoses, and find leaks before they leave a truck stranded.


## What this includes
- Cooling system pressure test to find external and internal leaks
- Coolant flush and refill with the correct extended-life spec
- Radiator, charge-air cooler, and fan clutch replacement
- Water pump, thermostat, and hose replacement
- Head gasket and oil-cooler leak diagnosis for coolant loss
- Cap, overflow, and coolant-sensor testing
- Overheat road test to confirm stable temperatures before route return

## Who it is for
- Corona fleets watching temperature gauges climb on hot Inland Empire afternoons
- Operators topping off coolant or spotting puddles under a parked truck
- Fleets on preventive schedules who want coolant serviced before summer peak

## Pricing
Flush and pressure test sit near the low end; radiator and pump jobs reach the high end. Mechanical labor billed at $260/hr, diagnostics at $285/hr.

## FAQ
### Why does my box truck overheat in traffic?
A weak fan clutch, clogged radiator, failing water pump, or low coolant all cause heat spikes in stop-and-go Inland Empire traffic. We pressure-test to find the exact cause for Corona operators.

### How often should coolant be flushed?
Most box trucks need extended-life coolant service every two to four years or by mileage. We check condition and confirm the right interval for your Corona duty cycle.

### Can you tell if a coolant leak is internal?
Yes. We pressure-test and check for oil and coolant cross-contamination to tell an external hose leak from an internal head gasket or oil-cooler fault.