Why Is My Chevy Impala Overheating?- How To Fix

(Last Updated On: September 27, 2023)

Overheating is a common issue, especially for Chevy Impala models. When your Chevy Impala gets too hot, it’s more than just annoying, it’s a sign that something’s not right, and you’ve got to fix it before it turns into a bigger problem.

If your Chevy Impala is overheating, it’s important to take action immediately. Overheating can cause serious damage to your engine and can also be dangerous for you and your passengers.

Why Is My Chevy Impala Overheating?Fix

There are several reasons why a Chevy Impala might overheat. Some of the most common causes include

  • Coolant leak
  • Failing thermostat
  • Clogged radiator
  • Faulty radiator fan
  • Low coolant level

Coolant Leak

if you spot a coolant leak, don’t wait around. That stuff keeps your engine from cooking itself, so a leak’s a big deal. You gotta fix it before your engine gets messed up.

To spot the leak, check if there’s a greenish liquid under your car. Found it? Good. Now figure out which part is the troublemaker.

Common Fixes for Coolant Leaks:

  1. Hose Too Loose? Grab a wrench and tighten that hose clamp up.
  2. Hose Looks Beat Up? It’s time for a new hose, mate.
  3. Radiator Leaking? You could try sealant, but better to get a new one.
  4. Water Pump’s the Culprit? That needs a replacement, no shortcuts.
  5. Thermostat Acting Up? Swap it for a new one.

Bad Thermostat

So, your thermostat’s messing up, huh? This little guy controls how much coolant flows through your engine. When your engine’s cold, it stays closed. When the engine warms up, it starts to open. That’s how your engine avoids getting too hot or too cold.

Signs Your Thermostat’s Messed Up:

  1. Engine’s too hot or too cold
  2. Coolant’s leaking near the thermostat area
  3. That ‘Check Engine’ light’s on

Fixing Your Thermostat:

You need to swap the bad thermostat with a new one. Don’t worry, it’s not too complicated. You can do this in your own garage.

Here’s How to Swap a Thermostat:

  1. Park your car straight and wait for the engine to cool.
  2. Pop open the hood and find the thermostat housing. It’s usually near the top of the engine.
  3. Put a pan under the housing. It’ll catch any leaking coolant.
  4. Undo the bolts around the thermostat housing.
  5. Gently lift the housing and take out the old thermostat.
  6. Put in the new thermostat. Make sure the spring side faces the engine.
  7. Put the housing back and tighten the bolts.
  8. Fill up your coolant and fire up the engine.
  9. Check for any leaks and see if the engine’s temperature is okay.

Clogged Radiator

When it gets clogged, that messes up the coolant flow and can heat up your engine.

Signs of a Clogged Radiator:

  1. Engine’s heating up too much
  2. Coolant’s leaking around the radiator
  3. Coolant level is dropping fast
  4. Radiator’s scalding hot
  5. Hoses to and from the radiator are hot too

How to Deal with a Clogged Radiator:

You’ve got two main options to fix a clogged radiator:

  1. Flush the Radiator: You can usually do this yourself. Drain the coolant first. Then flush it with a radiator cleaner or use distilled water.
  2. Swap the Radiator: This is a bigger job and it’s best to have a mechanic handle it. If the radiator’s really messed up, then you’ll need a new one.

Faulty Radiator Fan

This fan’s main job is to pull air through the radiator so that the coolant cools down. When this fan stops working, the engine can overheat, and that’s not good for anyone.

Signs of a Bad Radiator Fan:

  1. Engine is getting way too hot.
  2. Coolant leaking around the radiator.
  3. Coolant level going down quick.
  4. Radiator’s burning up.
  5. Hoses to and from the radiator also feel hot.
  6. The fan’s not spinning, even when the engine’s hot.

What to Do If Your Radiator Fan Is Acting Up:

Step 1: Figure out the issue. Check the fuse and relay first if the fan’s not running. If those are fine, you’re probably looking at a bad fan motor or a faulty fan clutch.

Step 2: Fix the problem. If the fan motor is the issue, you’ll need a new one. The same goes for the fan clutch—either fix it or replace it.

Low Coolant Level

The coolant takes the engine’s heat and sends it to the radiator to get rid of it. Not enough coolant? Your engine’s gonna get hot, and that’s a problem.

Signs You’re Low on Coolant:

  1. Your engine’s running hot.
  2. You spot coolant leaking near the radiator or somewhere else in the cooling system.
  3. The coolant level is dropping faster than it should.
  4. Your radiator feels like it’s on fire.
  5. The hoses connected to the radiator are also really hot.

How to Handle Low Coolant Levels:

The fix here is pretty simple. Fill up your coolant reservoir. Just be sure you’re using the right kind of coolant for your car.


There are a number of reasons why a Chevy Impala might overheat, but the most common causes are coolant leaks, failing thermostats, clogged radiators, faulty radiator fans, and low coolant levels.

If the coolant level is normal, you should check for a coolant leak. Look for any signs of coolant on the ground or under the car. If you find a leak, have it repaired as soon as possible.

Additional Tips

  • Check the coolant level regularly and add coolant as needed.
  • Flush the cooling system every two years.
  • Replace the thermostat every five years or 50,000 miles.
  • Have the radiator inspected and cleaned regularly.
  • Keep the engine compartment clean and free of debris.


  • Randy Worner

    My name is Randy Worner and I am the founder of chevygeek.com. I have been working on cars and trucks for almost 45 years. For the last 36 years I have taught Automotive / Diesel Technology classes for UTI, Snap On Tools, Chrysler, Pepboys, Lone Star College, NAPA and TBC Corporation.I also own a technical writing company known as Supreme Technical Services. It is ASE Gold Seal certified and Blue Seal Certified Author of auto/truck repair information.

Leave a Comment