Best Coolant System Flush for 2023 (TOP 20)

Sometimes it might be quite difficult to find the best coolant system flush. With every niche market offering so many different products, it makes sense that this is the case.

Unfortunately, this very fact can make it incredibly difficult to find the item that best suits your needs, which is why we’ve put together this coolant system flush buying guide.

Our Top 20 Picks:

#PreviewProduct
1 Prestone AS105 Total Cooling Syststem Cleaner for Radiator, Heater Core, and Hoses, 22 oz., 1 pack Prestone AS105 Total Cooling Syststem Cleaner for Radiator, Heater Core, and Hoses, 22 oz., 1 pack
2 CRC Thermocure Coolant System Rust Remover, 32 Oz, Rust Remover for Vehicle Cooling Systems, Removes Rust Scale and Deposits CRC Thermocure Coolant System Rust Remover, 32 Oz, Rust Remover for Vehicle Cooling Systems, Removes...
3 Prestone AS105 Radiator Flush and Cleaner - 22 oz. - 2 Pack Prestone AS105 Radiator Flush and Cleaner - 22 oz. - 2 Pack
4 OEMTOOLS 24719 Coolant System Flush Gun, Lever-Action Coolant Flush Kit, Heater Core Flush Kit Features a Universal Nozzle, Lock-On Latch for Air Hoses OEMTOOLS 24719 Coolant System Flush Gun, Lever-Action Coolant Flush Kit, Heater Core Flush Kit...
5 Prestone AF-KIT Flush 'N Fill Kit Prestone AF-KIT Flush 'N Fill Kit
6 ABN Automotive Coolant Flush Machine - Air and Water Combo Coolant Backflush Gun - Multi-Size Nozzles Fit 19-40mm Hoses ABN Automotive Coolant Flush Machine - Air and Water Combo Coolant Backflush Gun - Multi-Size...
7 Lisle 60900 Heater Core Backflush Tool Lisle 60900 Heater Core Backflush Tool
8 Irontite ThoroFlush (468-9110-16) Irontite ThoroFlush (468-9110-16)
9 OEMTOOLS 87009 No-Spill Coolant Funnel Kit, Near Universal Fitment, Translucent, 15 Piece Set, Cooling System Funnel Allows Access To Hard-To-Reach Radiators , White OEMTOOLS 87009 No-Spill Coolant Funnel Kit, Near Universal Fitment, Translucent, 15 Piece Set,...
10 BlueDevil 00204 Radiator Flush - 1 Quart BlueDevil 00204 Radiator Flush - 1 Quart
11 OEMTOOLS 24444 Coolant System Refiller Kit, 5 Adapters, Eliminate Trapped Air, Test Radiator and Heating Core Lines for Leaks, Vacuum Fill Coolant Tool, Vacuum Leak Tester OEMTOOLS 24444 Coolant System Refiller Kit, 5 Adapters, Eliminate Trapped Air, Test Radiator and...
12 Fleetguard Cummins Coolant Plus Fleetguard Cummins Coolant Plus
13 Smilyeez BG Products 6830 Cooling System Flush Coolant Service Kit BG Universal Cooling System Cleaner PN 540 & BG Universal PN 546 Smilyeez BG Products 6830 Cooling System Flush Coolant Service Kit BG Universal Cooling System...
14 Liqui Moly 2051 Radiator Cleaner - 300 ml Liqui Moly 2051 Radiator Cleaner - 300 ml
15 BlueDevil 00203 Radiator Flush & Oil Degreaser - 1 Quart BlueDevil 00203 Radiator Flush & Oil Degreaser - 1 Quart
16 RV Antifreeze No Splash Bottle Adapter with Male and Female Twist Connect, Used to Winterize RV Camper Marine Garden Hose to Bottle RV Antifreeze No Splash Bottle Adapter with Male and Female Twist Connect, Used to Winterize RV...
17 Dorman 47016: Universal Coolant Service Kit Dorman 47016: Universal Coolant Service Kit
18 Rislone Hy-per Cool Radiator Cleaner and Super Flush, 16 oz Rislone Hy-per Cool Radiator Cleaner and Super Flush, 16 oz
19 ADAFIRST Coolant Vacuum Refill Kit, Cooling System Radiator Vacuum Purge & Fill Tool Set, Automotive Coolant Filler with Universal Adapter Hoses for Car Motorcycle Truck Airlift Use Red ADAFIRST Coolant Vacuum Refill Kit, Cooling System Radiator Vacuum Purge & Fill Tool Set, Automotive...
20 Nissan Versa 2007 thru 2019 Haynes Repair Manual: 2007 thru 2019, All Models (Haynes Automotive) Nissan Versa 2007 thru 2019 Haynes Repair Manual: 2007 thru 2019, All Models (Haynes Automotive)

Our Favorite Coolant System Flush Reviews:

Bestseller No. 1
Prestone AS105 Total Cooling Syststem Cleaner for Radiator, Heater Core, and Hoses, 22 oz., 1 pack
  • 2-in-1 formula designed for light flushing and heavy-duty cleaning
  • Cleans cooling systems to help prevent overheating
  • Non-toxic, non-acidic formula is easy-to-use and safe for all cooling system metals
  • Effectively removes heavy deposits by drawing metal oxides into the solution
  • Strong enough to help restore maximum cooling system efficiency
Bestseller No. 2
CRC Thermocure Coolant System Rust Remover, 32 Oz, Rust Remover for Vehicle Cooling Systems, Removes Rust Scale and Deposits
  • EVAPO-RUST RUST REMOVER: Evapo-Rust effortlessly removes rust from automotive parts, hardware, tools, cookware, and antiques without any scrubbing or sanding.
  • THERMOCURE FORMULA: Thermocure is made of a water-based solution that is easy-to-use on automotive cooling systems. It is non-corrosive and non-flammable.
  • EASY APPLICATION: This non-flammable solution removes rust that causes overheating in three easy steps. Treats cooling systems up to 3 gallons.
  • USE: The cooling system cleaner removes rust from the cooling system in three easy steps that include draining the coolant, adding the solution and topping off with water, let the solution stay in the car for 3-4 hours up to several days. Drain the cooling system and flush 3-4 times with water. Refill with manufacturer's recommended coolant.
  • SPECIFICATIONS: Our Thermocure cleaner is available in a 32 oz bottle.
Bestseller No. 3
Prestone AS105 Radiator Flush and Cleaner - 22 oz. - 2 Pack
  • Prestone AS105 Radiator Flush and Cleaner - 22 oz. - 2 Pack
Bestseller No. 4
OEMTOOLS 24719 Coolant System Flush Gun, Lever-Action Coolant Flush Kit, Heater Core Flush Kit Features a Universal Nozzle, Lock-On Latch for Air Hoses
  • Effective Coolant System Flush: Performing a coolant, radiator flush, or heater core system flush is made easy with our radiator flush kit
  • Solve Heating Problems: This heater core backflush tool allows you to clean buildup of rust particles, dirt, and other clogging particles from your heater core
  • Comfortable and Practical: Our lever-action flushing gun is used with a standard garden hose with included coupler and simple air attachment
  • Easy to Use: Insert the universal nozzle of our radiator flush gun into your outlet hose; Blast pressurized water through the line to remove gunk and grime from your heater core or coolant systems
  • Parts Safe Coolant Flush: Clean the interior walls of your radiator or coolant systems with 20-40PSI so that you don’t damage the walls of your systems
SaleBestseller No. 5
Prestone AF-KIT Flush 'N Fill Kit
  • Professionally back-flushes cooling systems of most cars and light trucks.Fit Type: Universal
  • Allows you to flush the complete cooling system, not just the radiator, in one easy process
  • Removes rust and dirty coolant that that can lead to a clogged radiator
  • Prevents potential overheating and engine damage
  • Easily installs antifreeze/coolant in minutes
Bestseller No. 6
ABN Automotive Coolant Flush Machine - Air and Water Combo Coolant Backflush Gun - Multi-Size Nozzles Fit 19-40mm Hoses
  • [Car Maintenance]: Flush stubborn clogs from cooling systems with the ABN Cooling System Power Flush Gun; Using compressed air and water, flush debris and from your system; Requires push-on or quick disconnect garden hose adapter (not included)
  • [Control Pressure]: Squeeze trigger handle of coolant power flush gun to increase water flow and pressure; One-handed application in either left or right hand
  • [Fit Needs]: Bayonet quick connect coolant air bleeder nozzles include adapter sizes 0.7-inch (19mm), 1.1-inch (29mm), 1.3-inch (32mm), 1.4-inch (36.5mm), and 1.6-inch (40mm) and fit your garden hose adapter
  • [Air and Water]: Coolant flush gun outfitted with two connections for air and water adapters; Connect flush cooling system gun to shop air compressor and garden hose; Creates vortex of powerful cleaning
  • [For Your Garage]: Cooling system failure can lead to damage to your engine; This 13-inch (33cm) coolant flusher gun ensures coolant is flowing properly
SaleBestseller No. 7
Lisle 60900 Heater Core Backflush Tool
  • The tip fits 1/2", 5/8" and 3/4" hose fittings
  • Water pressure can be easily controlled with one hand by squeezing the handle of the heavy-duty spray gun
  • The insulated handle protects your hand when using hot water to flush the cooling system
  • The spray gun attaches to a standard garden hose
Bestseller No. 8
Irontite ThoroFlush (468-9110-16)
  • Industrial Strength concentrated radiator, engine coolant system and fuel tank cleaner
  • Loosens and removes rust, scale, grease, oil and sludge
  • Cleans Auto, HD Truck and Equipment Cooling Systems
  • Safe for use on Cast Iron, Aluminum or Plastic
SaleBestseller No. 9
OEMTOOLS 87009 No-Spill Coolant Funnel Kit, Near Universal Fitment, Translucent, 15 Piece Set, Cooling System Funnel Allows Access To Hard-To-Reach Radiators , White
  • SPILL FREE FUNNEL: Our coolant filler kit funnels automotive fluids, such as radiator coolant and oil, cleanly into any vehicle; the long burp funnel prevents spills and trapped air during refills after a coolant flush
  • ULTIMATE MULTI-VEHICLE FUNNEL KIT: 4 cap adapters, 5 filler neck adapters, 3 extensions, a stopper, and a high quality transparent coolant funnel form a funnel kit more complete than others
  • NEAR UNIVERSAL FITMENT: This spillfree funnel is ideal for an engine flush, a coolant pressure tester kit, even for a radiator flush; Coolant refill kit features near-universal fitment for American and foreign vehicles
  • ADAPTERS INCLUDED: With the exceptional number of included adapters, OEM TOOLS delivers a spill free funnel kit that works better than just any old radiator fill funnel or coolant filling kit with a coolant funnel adapter
  • PROTECT YOUR VEHICLE: Funnel automotive fluids, or combine with antifreeze tester kit to ensure your system stays clean and functional; Spill proof funnel kit includes a fluid stopper, which means no spills or air bubbles
SaleBestseller No. 10
BlueDevil 00204 Radiator Flush - 1 Quart
  • Extends Vehicle Life
  • Advanced Cleaning Power
  • Concentrated Formula
SaleBestseller No. 11
OEMTOOLS 24444 Coolant System Refiller Kit, 5 Adapters, Eliminate Trapped Air, Test Radiator and Heating Core Lines for Leaks, Vacuum Fill Coolant Tool, Vacuum Leak Tester
  • Complete Coolant System Refiller: Refills the entire cooling system including the heater core; Quickly eliminate the trapped air in your cooling system
  • Huge Time Saver: Eliminate time-consuming bleeding and purging, and completely remove all trapped air from your cooling system after a radiator flush
  • Discover Leaks: With this coolant pressure tester kit, check for leaks while under vacuum; If your vacuum level decreases while all valves are off, you have a leak in your system
  • Widely Useful: Radiator coolant vacuum refill kit comes with five adapters that fit most common radiator necks and coolant reservoirs
  • Simple to Use: The included venturi valve turns any air compressor input into a strong vacuum force; This is the easiest to use radiator fill kit you can find
SaleBestseller No. 12
Fleetguard Cummins Coolant Plus
  • Safe for use in aluminum radiators andheaters
  • Alkaline-Based Cleaner
  • Most effective cooling system oil/fuel contamination-cleaning agent available
  • 10 times more effective than automotive distributor detergent powders
SaleBestseller No. 13
Smilyeez BG Products 6830 Cooling System Flush Coolant Service Kit BG Universal Cooling System Cleaner PN 540 & BG Universal PN 546
  • Remove rust, scale and sludge from cooling system.
  • Improves cooling system function.
  • Extends coolant life.
  • Reduces the chance of overheating.
  • Can extend the life of cooling system components.
Bestseller No. 14
Liqui Moly 2051 Radiator Cleaner - 300 ml
  • Single Quantity
  • No Core Charge Req.
  • Weight: 0.8lbs
Bestseller No. 15
BlueDevil 00203 Radiator Flush & Oil Degreaser - 1 Quart
  • Product Type: Auto Accessory
  • Package Quantity: 1
  • Country Of Origin: United States
  • Package Dimensions: 14.375" (L) x 5.687" (W) x 8.875" (H)
SaleBestseller No. 16
RV Antifreeze No Splash Bottle Adapter with Male and Female Twist Connect, Used to Winterize RV Camper Marine Garden Hose to Bottle
  • MULTIPURPOSE: RV Winterizing has never been easier and much Cleaner! RV and Boat Antifreeze Apater is an ALL IN ONE 3/4 male and female Antifreeze Bottle to garden hose connector, In past only Male garden hose end was typically used to winterize recreational vehicles(RV), watercraft, garden hose, camper, boat and travel trailer. Our AntiFreeze Bottle Adapter fitting with female to bottle, and garden hose end are typically used to winterize sprinkler systems, garden hoses, and outdoor plumbing.
Bestseller No. 17
Dorman 47016: Universal Coolant Service Kit
  • Package Dimensions: 17.526 L x 2.286 H x 16.764 W (centimeters)
  • Package Weight : 0.3 pounds
  • Automotive Cooling Parts
  • Country of Origin : China
Bestseller No. 18
Rislone Hy-per Cool Radiator Cleaner and Super Flush, 16 oz
  • Eliminates Damaging Coolant Gels
  • Reduces Operating Temperatures
  • Neutralizes Acids That Cause Corrosion
  • Helps Prevent Formation of Scales / Deposits
  • Rislone Hy-per Cool Radiator Cleaner and Super Flush removes coolant gels and neutralizes acids in the cooling system. It cleans the entire cooling system preventing overheating and corrosion
SaleBestseller No. 19
ADAFIRST Coolant Vacuum Refill Kit, Cooling System Radiator Vacuum Purge & Fill Tool Set, Automotive Coolant Filler with Universal Adapter Hoses for Car Motorcycle Truck Airlift Use Red
  • Vacuum Coolant Refill Tool-- The automotive vacuum type coolant tool adopts an integrated structure and superior material, containing an easy-to-read vacuum gauge (range: -30-0 inHg / -76-0cmHg), plastic-housing brass manifold body, and 18-inch rubber hose, all stand up to heavy use. By filling coolant in a vacuum to eliminate bubbles, engine warping can be avoided by using this vacuum coolant refill tool. The quick-release coupler easily locks/unlocks the radiator adapter for easy operation.
  • Air Compressor Needed-- Pneumatic coolant replacement work needs a compressed air tool (an air compressor, but not offered) to pull a vacuum in the cooling system, then sucks the new coolant into the entire system and eliminates air pockets. Please remember to drain out the waste coolant inside the system first, and add moderate fresh coolant between the ideal pressure range of -25~-20 inHg. Normal vehicles complete the coolant change process in 10-15 minutes.
  • Pressure Hose & Coolant Hoses-- Cooling system filler kit comes with a fixed pressure hose(18-inch) and 2 transparent coolant hoses(24-inch & 60-inch). Blue anti-corrosion hose has a time-saving quick-release coupler for adapter connection. Coolant bleed hose can be installed on the tool to help prevent coolant splashing, and coolant delivery hose with brass quick plug and fine filter screen for quick lock and impurity catching. The transparent color makes it easy to observe the coolant flow.
  • Extensive Usage-- The universal tapered radiator adapter is made of rubber and aluminum, gives this air-driven coolant vacuum refill tool a wide application to radiator filler necks on a great many common domestic and foreign cars, motorcycles, trucks, SUVs, airlifts, etc. In addition to the built-in American air plug, considerate vacuum coolant fill kit also prepares a standby 1/4" European air plug for easy optional air source connection and less inconvenience.
  • After-sale Company-- Sincerely welcome to ADAFIRST store. Thank you for your trust and choice of the ADAFIRST. We will always stand behind our products. The products sold will enjoy unconditional return and exchange treatment within 30 days. To avoid delaying your work at hand, please check the completeness and functional performance of your purchase as soon as you receive it. If there is any doubt or question, just come to us and we are all at your service. Promise: Reply within 24 hours.
SaleBestseller No. 20
Nissan Versa 2007 thru 2019 Haynes Repair Manual: 2007 thru 2019, All Models (Haynes Automotive)
  • Editors of Haynes Manuals (Author)
  • English (Publication Language)
  • 272 Pages - 02/25/2020 (Publication Date) - Haynes Manuals N. America, Inc. (Publisher)

Last update on 2023-01-12 / Affiliate links / Images from Amazon Product Advertising API

How to find the best coolant system flush?

Here, we’ll be going over a number of factors that you can use to ensure that you’re purchasing the best coolant system flush for you.

Regardless of which type of item you’re looking to buy, chances are that there are existing buying guides on the internet, all of which aim to give you good coolant system flush recommendations.

Despite these recommendations, however, it’s always a good idea to do your own research. In addition to this research, asking yourself the following questions is also super helpful:

  • What features does the coolant system flush need to have to be perfect for my needs?
  • What is my budget?
  • Do I need to purchase a certain brand?

Once you’ve answered these questions and have a good idea of what you’re looking for and the buying process becomes much easier. Keep in mind that when looking for the best product, there’s no need to rush. In fact, very rarely are the ideal products found by choosing the first one you see or by basing your decisions on only one factor. Take your time and enjoy the process!

Now, with the answers to the previous questions in mind, we urge you to use our upcoming buying guide for coolant system flush to find what you’re looking for:

Brand

In some cases, the brand of coolant system flush is very important. For example, if you’re looking for an item that works in tandem with another, you might very well need both products to be the same brand. If this is the case, it’s vital to pay attention to this factor, as choosing the wrong product can mean the difference between wasting your money and buying a great product that functions as it should.

Features

The features in any given coolant system flush are important because they can dictate which version of an item you need and how much money you need to spend. Consider all the key features that you want your item to have and don’t settle for anything that doesn’t check at least ¾ of your boxes.

Reviews

Customer reviews about coolant system flush are crucial – especially when you’re buying a product that costs a lot of money or serves a big importance. Luckily, most products can be found online, which means that it’s common for there to be scores of customer reviews from those who have already purchased any given product.

Pay attention to these reviews. Take note of the pros and cons that they mention, and factor these into your big decision. In some cases, you’ll be forced to sacrifice one con in order to gain a particular pro, but being aware of the potential con is going to be beneficial in either case.

Quality

Of course, quality is key. You don’t want to purchase a low-quality product. If you do, you run the risk of your item breaking, not working properly, or otherwise proving to be very disappointing, as well as a waste of money.

You can compare coolant system flush quality by researching what your potential purchases are made from, contrasting the individual items against each other to discern which one is made of the best materials.

Warranty

Warranty isn’t always going to be important, but it definitely can be. This is especially true if the item in question is tech-related or expensive. A good warranty will be valid for an extended time after purchase and cover a variety of problems ranging from item defects to random accidents, water damage, and other miscellaneous events that could ruin your product.

Conclusion

The quest to find the best coolant system flush can be daunting – but it doesn’t have to be. It can be made much easier by asking yourself a few simple questions and then thinking critically about the items you want to buy. Consider their features, quality, brand, warranty, and customer reviews and you’re more likely to make a great purchase.