6 Signs That Tell You Your Radiator Is Clogged

July 20th, 2022 by

6 Signs That Tell You Your Radiator Is Clogged


Are you aware of what to do if your radiator begins to make odd noises? Or, worse yet, if it stops working altogether? If not, don’t worry! We’re here to help. In this blog post, Lakeland Genesis will discuss six signs that tell you your radiator is clogged. Knowing these signs allows you to take action before the problem gets too severe.

Sign 01: Overheating Engine

An overheated engine is one of the most prominent signs that your radiator is clogged. If you notice that your car’s temperature gauge is reading higher than usual, it’s time to take your vehicle in for service. Signs of an overheating engine include:

  • The temperature gauge needle moving into the red zone
  • steam coming from under the hood
  • smoke coming from under the hood

If you notice these signs, pull over immediately and turn off your engine. Do not open the hood until the engine has cooled down completely.

Sign 02: Coolant leak

It is a sure indicator that your radiator has a blockage when fluids, particularly radiator coolant, begin leaking. When the fluid in your radiator cannot flow properly, it flows in another location, which causes leaks. As a result, always consider a potential radiator blockage when there is a coolant leak.

Sign 03: Low coolant level

It’s a good idea to inspect your radiator for leaks if you find that your coolant level is low. The coolant may run out of a blocked radiator, resulting in a low coolant level. It’s crucial to check your radiator and top off the coolant as necessary since low coolant levels might result in the engine overheating.

Sign 04: Discolored and thicker coolant

You are aware of the original color of your coolant, right? Do you take care to check your coolant’s condition? If you do, you’ll be able to see that its color and viscosity have changed. The coolant will develop a dirty brown shade and feel heavier than usual when rust, sludge, and other impurities mix. Whenever this occurs to your coolant, the likelihood of accumulation rises, and the radiator’s efficiency will decrease.

Sign 05: Damaged water pump

If your radiator is clogged, it can cause damage to the water pump. The water pump is responsible for circulating the coolant throughout the engine. If the coolant can’t flow properly, it can cause the water pump to overheat and fail. This will eventually lead to your engine overheating as well.

 Sign 06: Blocked, bent, or damaged radiator fins

The radiator fins are the metal pieces that protrude from the radiator. They help dissipate heat and keep the coolant cool. If they become blocked, bent, or damaged, it can prevent the coolant from flowing properly and cause your engine to overheat.


If you notice these radiator signs, taking action is essential. A clogged radiator can cause severe damage to your engine if left unchecked. Try flushing the radiator with a solution of 50% water and 50% vinegar. You might have to replace the radiator if this doesn’t work.

Visit Lakeland Genesis serving Valrico, FL, for your radiator problems. We have skilled service professionals available to assist you with any service needs.

Schedule your service today!

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