Radiator & Cooling System Service

Coolant flush, leak repair, and thermostat replacement.

Radiator & Cooling System Service

Your cooling system prevents your engine from overheating — a failure can cause catastrophic and expensive engine damage. We perform coolant flushes, pressure tests, leak repairs, radiator replacements, thermostat service, and water pump repairs to keep your engine at the right operating temperature. Hot summers put extra strain on your cooling system, making regular maintenance especially critical for reliable vehicle operation.

Why Your Cooling System Needs Regular Service

Coolant breaks down over time, losing its ability to protect against corrosion and maintain proper heat transfer. Old coolant can cause internal corrosion in your radiator, heater core, and engine block, leading to leaks and reduced cooling efficiency. A stuck thermostat can cause overheating or prevent your engine from reaching optimal operating temperature. Regular cooling system service prevents these failures and protects your engine — the most expensive component in your vehicle.

Our Cooling System Services

We offer comprehensive cooling system care including full coolant flushes with fresh antifreeze, pressure testing to detect leaks, radiator repair and replacement, thermostat replacement, water pump service, hose and clamp replacement, and cooling fan diagnostics. Our experienced technicians use the correct coolant type for your specific vehicle — an important detail, since mixing incompatible coolants can cause damage to the system.

Radiator & Cooling Service in San Francisco

Idling in SoMa gridlock and grinding up San Francisco's hills makes your cooling system work overtime, and a road trip toward warmer inland weather can push a marginal radiator over the edge. If your temperature gauge is running high, you see a coolant puddle under your car, or you smell something sweet under the hood, don't ignore it — overheating can cause head gasket failure and warped cylinder heads within minutes. Bring it to our Folsom Street shop and we'll diagnose the issue quickly before a minor problem becomes a major one.

What's Included

Coolant flush and fill
Radiator repair and replacement
Thermostat replacement
Water pump service
Hose and clamp replacement
Cooling system pressure testing
Cooling fan diagnostics

Signs You May Need Radiator Service

Temperature gauge reads higher than normal
Coolant puddle under your car (green, orange, or pink fluid)
Sweet smell coming from under the hood
Heater blows cold air in winter
Low coolant warning light is on

Why Choose Auto City Repair for Radiator Service

Correct coolant type matched to your vehicle's specifications
Pressure testing to detect hidden leaks
experienced technicians with cooling system expertise
Prevent costly engine damage with proactive service

Frequently Asked Questions

How often should I flush my coolant?

Most manufacturers recommend a coolant flush every 30,000 to 50,000 miles, or every 3 to 5 years. Check your owner's manual for the specific interval, or ask our technicians during your next visit.

What does it mean if my car is overheating?

Overheating can be caused by low coolant, a stuck thermostat, a failing water pump, a clogged radiator, or a broken cooling fan. Pull over safely and call us — driving an overheating vehicle can cause severe engine damage.

Is the sweet smell under my hood a coolant leak?

Most likely, yes. Antifreeze has a distinctive sweet smell. If you notice this odor or see green, orange, or pink fluid under your vehicle, bring it in for a cooling system inspection as soon as possible.