What to Do When Your Car Is Overheating in Lansing, MI
An overheating engine is one of the most urgent situations a driver can face. Ignoring it for even a few minutes can turn a fixable repair into engine damage that costs thousands. In Michigan, where summer heat and stop-and-go traffic stress cooling systems daily, knowing exactly what to do — and what not to do — is essential.
Quick Answer: What Should You Do If Your Car Overheats?
Pull over safely as soon as you can and turn off the engine
Do NOT open the hood or radiator cap immediately — wait 15–20 minutes minimum
If you must keep moving briefly, turn the heater on full blast — it draws heat away from the engine
Do not drive the vehicle further until the cause has been identified and repaired
Warning Signs Before Full Overheating
Your car usually gives you warning before the situation becomes critical:
Temperature gauge climbing toward or into the red zone
Steam or white smoke rising from under the hood
Sweet smell (coolant burning off or leaking onto hot components)
Heater suddenly blowing cold air even when set to hot
Engine performance dropping, rough running, or loss of power
In Michigan summers, pay extra attention to the temperature gauge during slow traffic, construction zone stops, or extended idling. The cooling system depends on airflow — when the vehicle isn’t moving, the electric fan has to do all the work.
What Causes Engine Overheating?
Low coolant level from a leak in a hose, the radiator, or the water pump
Failed thermostat stuck closed, preventing coolant circulation
Broken or failing water pump not circulating coolant
Clogged or leaking radiator reducing cooling capacity
Blown head gasket allowing combustion gases into the cooling system
Failed radiator fan not activating at low vehicle speeds
A head gasket failure is the most serious cause — and also the most expensive to repair. The reason overheating needs to be addressed immediately is that extended overheating is one of the primary causes of head gasket failure.
What NOT to Do When Your Car Overheats
Do not open the radiator cap when the engine is hot.
The cooling system is pressurized. Opening the cap on a hot engine releases pressurized boiling coolant that can cause severe burns. Wait until the engine has fully cooled — at least 15–20 minutes — before touching any cooling system components.
Do not keep driving and hope it resolves itself.
Overheating doesn’t self-correct. Every minute you continue driving an overheating engine increases the risk of warped cylinder heads, blown head gaskets, or seized engine components.
Do not add cold water to a hot engine immediately.
Pouring cold water into a hot engine can cause thermal shock to metal components. Wait for the engine to cool before adding coolant or water.
After You’ve Safely Pulled Over
Once stopped and engine off:
Let the engine cool for at least 15–20 minutes before touching anything
Check the coolant reservoir (translucent plastic tank near the radiator) — if empty, a coolant leak is likely
Look for visible leaks under the vehicle or steam from under the hood
Do not restart the vehicle and continue driving until the cause is identified
If you’re stranded, calling for a tow is almost always the right choice. The cost of a tow is far less than the cost of the engine damage that results from continuing to drive an overheating vehicle.
How 517 Auto Care Handles Overheating Repairs
Cooling system diagnosis and repair is handled across the 517 Auto Care network. The process starts with identifying the root cause before replacing parts — not all overheating is caused by the radiator.
Auto Surgeon handles diagnostics and cooling system evaluation. A&D Repair performs radiator replacement, water pump service, thermostat replacement, and head gasket repair. Affordable Tires & Auto Repair provides cooling system inspections and maintenance services. If repairs involve sensors or ADAS systems, Complete ADAS Solutions ensures proper calibration.
Backed by a 5-Year / 60,000-Mile Warranty
All qualifying repairs through the 517 Auto Care network include a 5-year / 60,000-mile warranty on parts and labor.
Built on Trust, Driven by Standards
FAQ: Car Overheating
Can I add water if I don’t have coolant?
In an emergency, yes — distilled water is acceptable. But water doesn’t have the same freeze protection or corrosion inhibitors as proper coolant, and it should be flushed and replaced with the correct coolant mixture as soon as possible.
How do I know if it’s a head gasket?
White smoke from the exhaust, milky oil (coolant mixing with oil), or coolant loss without visible external leaks are all indicators. A pressure test and inspection confirm the diagnosis.
Is overheating always a major repair?
Not always — a failed thermostat, a cracked hose, or a low coolant level from a minor leak can all cause overheating and are relatively straightforward repairs. The key is diagnosing quickly before the overheating causes secondary damage.
Had an Overheating Event? Get It Inspected Before Driving Further.
Don’t assume it’s fine just because the engine cooled down. Stop by Affordable Tires & Auto Repair serving Lansing, East Lansing, Okemos, Haslett, Holt, and DeWitt. We’ll inspect the cooling system and tell you exactly what happened — and what it takes to prevent it from happening again.
No pressure. Just answers before you drive away with a bigger problem.