Summer in Seattle may not reach desert temperatures, but your engine still works hard—especially during road trips, uphill drives, or stop-and-go traffic. One of the biggest dangers to your vehicle in warm weather is engine overheating, which can lead to serious damage if left unchecked.
At High Road Automotive, we help Seattle drivers avoid overheating problems with regular maintenance and inspections. In this blog, we’ll explain how your cooling system works, what causes it to fail, and how to keep your car running cool all summer long.
What Is Your Cooling System and Why Does It Matter?
Your vehicle’s cooling system helps regulate engine temperature. It prevents your engine from getting too hot by circulating coolant (also called antifreeze) through the engine and radiator. Key components include:
- Radiator
- Thermostat
- Water pump
- Cooling fan
- Hoses and clamps
- Overflow tank
- Coolant (fluid)
If any part of the system fails, your engine can overheat—and the damage can be expensive or even irreversible.
Signs Your Cooling System Needs Attention
Knowing the warning signs of cooling system trouble can help you avoid a breakdown:
1. Rising Temperature Gauge
If your dashboard gauge starts to creep into the red zone, your engine is getting too hot. Pull over and let the engine cool down before driving further.
2. Steam from the Hood
Steam often means coolant is leaking or boiling over. Do not open the radiator cap while the engine is hot.
3. Coolant Leaks
Puddles of green, orange, or pink fluid under your car are signs of a coolant leak. This can happen due to a cracked hose or bad water pump.
4. Low Coolant Warning Light
If this light comes on, your coolant is either low or not circulating properly.
How to Maintain Your Cooling System
Preventing overheating is easier—and less expensive—than repairing a damaged engine. Here’s how to stay ahead of the heat:
Check Coolant Levels
Inspect your overflow tank regularly and make sure the coolant is between the “min” and “max” lines. Top it off with the correct type of coolant if needed.
Inspect Hoses and Clamps
Look for cracks, bulges, or leaks in radiator and heater hoses. These can burst under pressure, especially in hot weather.
Flush the Cooling System
Coolant can become acidic and lose effectiveness over time. Most manufacturers recommend a full flush every 2 to 5 years, depending on the type of coolant.
Test the Thermostat
A stuck thermostat can keep coolant from circulating, causing the engine to overheat. This part should be checked during regular maintenance.
Replace the Radiator Cap
A worn radiator cap can prevent the system from maintaining proper pressure. It’s a small part but plays a big role in preventing boil-overs.
Common Questions About Cooling System Maintenance
Q: How often should I check my coolant?
A: At least once a month, especially before a long trip or during hot weather.
Q: Can I use water instead of coolant?
A: Only in an emergency. Coolant contains additives that prevent corrosion and boiling. Water alone can damage your engine over time.
Q: How much does a cooling system inspection cost?
A: It’s usually affordable. At High Road Automotive, we offer cooling system checks as part of our routine maintenance services.
Q: What should I do if my car overheats?
A: Turn off the AC, turn on the heater to help draw heat away from the engine, and pull over safely. Never open the radiator cap while the engine is hot—wait at least 30 minutes.
Trust Seattle’s Cooling System Experts
At High Road Automotive in Seattle, WA, we know how to keep your vehicle running cool, even on the warmest days. Whether you’re planning a road trip or just want to prevent future problems, we’ll inspect your entire cooling system and perform any needed repairs before small issues become big ones.
Schedule your cooling system check today and stay cool behind the wheel this summer.