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MAINTAINING YOUR COOLING SYSTEM: FLUSHING AND REPLACING COOLANT

American Pride Automotive • Apr 05, 2019
Along with flat tires and low or faulty batteries, an overheating engine is one of the leading causes of car breakdowns. An engine can overheat for many reasons, but coolant issues are often to blame. When antifreeze is dirty or running low because of non-replacement or a leak, the engine’s ability to stay cool under pressure is inhibited. That’s why it’s important that you make flushing and replacing your coolant a part of routine auto maintenance.

American Pride can inspect your radiator system and flush/replace antifreeze, but if you want to do it yourself for the first time, take a look at our handy guide.

*SAFETY NOTES:
Antifreeze is highly toxic. Dispose of it into a container with an airtight lid and take care to not let any wash into storm drains. Check local regulations regarding safe disposal of coolant (Find your Hampton Roads area hazardous waste disposal site here) and keep it away from children and animals!
Never remove a hot radiator cap. Despite its name, coolant can get VERY hot and will burn you if you don’t flush the system when the engine is cool.
Be sure to wear gloves and safety goggles throughout the whole process.
What you will need:
  • 1-2 gallons of antifreeze (Check your vehicle’s owner’s manual for the manufacturer recommended type and brand.)
  • 2 gallons of distilled water
  •  A garden hose
  • Radiator flush solution (optional)
  • A disposable drainage pan
  • A funnel
  • A few large, sealable containers
Ok, let’s flush that cooling system! As you proceed, stay on the lookout for cracked or worn hoses and plugs that may need replacement.

1. DRAIN THE OLD COOLANT
Place your disposable drainage pan under the vehicle, below the radiator. Assuming that you’ve lifted your hood and have the owner’s manual on hand, find the radiator drain plug. It will be along the bottom of the radiator and might be a screw plug, a bolt plug, or a petcock. If it’s a screw or a bolt, remove it completely. If it’s a petcock, open it all the way and let the old coolant drain into the pan.

Once all the coolant has drained, close the petcock (or replace the screw/bolt) and use the funnel to transfer the old fluid to one of the sealable containers.

2. FLUSH THE SYSTEM
It’s flushing time! Remove the radiator fill-cap and, if you choose to use it, pour in a container of flush solution. Then take the garden hose and fill the rest of the upper radiator with water. With the drainage pan under the radiator, open the petcock and allow the water to pour out. Repeat this process until the water comes out clear. Dispose of the rinsing water like you did the old coolant in a sealable container. Close the petcock.

3. ADD FRESH COOLANT
When you’re certain that the system is squeaky clean, you can add the new coolant. Unless your car calls specifically for premixed 50/50 antifreeze, fill half of the compartment with distilled water and the other half with the unmixed antifreeze. Do not replace the radiator cap just yet!

4. BLEED THE SYSTEM
Now it’s time to “bleed” the system, which is merely the process of eliminating air pockets from the radiator system. With the radiator cap off, start your engine. Let it run for about 10 minutes and then turn your heater on to its highest setting for about another 10. Turn your vehicle off and let the engine cool.

5. TIE UP LOOSE ENDS
Carefully add a little more antifreeze to replace any lost in the bleeding process and replace the fill-cap. You’re almost good to go, but wait!

Double check that no coolant has leaked under your car. Even a small puddle can make its way into storm drains or prove fatal to curious animals. Collect the sealed containers and get them to a hazardous waste disposal facility ASAP. And make sure you wash your hands, even if you wore gloves.

Flushing and replacing your coolant on a regular basis can help you avoid the dreaded smoking engine and maximize your car’s performance for the long term. American Pride recommends changing antifreeze every two years (but check your owner’s manual for the maker’s recommendation). When you bring your vehicle to us for this service, we don’t stop at just draining and refilling your coolant. Instead, our team performs a full radiator inspection and flushing service that includes:

  • System inspection and pressure test for leaks
  • Addition of flush chemicals to the radiator
  • Power-flushing system through flush machine
  • Refilling system with proper amount of anti-freeze
  • Addition of sealant/lubricant to the system
  • A 6-month/6,000-mile warranty
Does your radiator system need a tuneup or perhaps some repairs? American Pride is here to give you expert service and answers to any automotive questions you might have. Call, contact us or stop in today.
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