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Engine & Radiator Flushes

56 engine & radiator flushes from Atlantis, BlueDevil Products, Liqui Moly and more.

Recommended Engine & Radiator Flushes

Atlantis

Engine

+Works with Kawasaki JS440, JS550 and 650SX models
+Universal 3/8 inch flush fitting for other engines
+Blue kit covers several Kawasaki jet ski models in one package
−Compatibility is limited to the listed Kawasaki models and fittings
No price recorded yet.
BlueDevil Products

Radiator

+Three-in-one formula handles degreasing, flushing and rust removal
+One quart bottle for a single cooling system flush
+Works across multiple vehicle types
−A single quart may not cover larger cooling systems
No price recorded yet.
BlueDevil Products
+Removes sludge, gum and varnish from the engine
+Helps extend engine life according to the product name
+Helps reduce emissions according to the product name
−A single quart may not be enough for larger engines
No price recorded yet.
Liqui Moly

Transmission

+One-liter bottle provides a large volume of cleaner
+Made for flushing automatic transmissions
+Multicolor design suits no specific mechanical function
−Only suited to automatic transmissions, not manual gearboxes
No price recorded yet.
Liqui Moly
+500 ml bottle of quick-acting diesel particulate filter cleaner
+Made to clean diesel particulate filters specifically
+Quick cleaner formula works in a short treatment period
−Only for diesel particulate filters, not general engine cleaning
No price recorded yet.
Design Engineering
+Sold in a 16 oz bottle for cooling system flushing
+Cleans engine radiators as a radiator cleaner
+Works as a cooling system flush for engine radiators
No price recorded yet.
TSI Supercool
+High-temp A/C flush with flash point above 250 F
+32 fl oz container holds a sizable flush volume
+Made for air conditioning system flushing
No price recorded yet.
Four Seasons
+Sold in a 25 oz container as a flush solvent
+Dura II name points to a flush solvent for cooling systems
−Holds 25 oz, a smaller amount than some flush solvents
No price recorded yet.
Atlantis

Engine

+Fits Yamaha 760, 1100, 1200 and J models
+Engine flush kit for cleaning the cooling system
+Covers several Yamaha models in a single kit
−Limited to the listed Yamaha model lines
No price recorded yet.
Autovic

Engine

+Includes a T-port and anodized aluminum adapter
+Designed for Ford Powerstroke VT365 oil cooler flushing
+6.0 liter capacity covers the oil cooler flush
−Designed specifically for the Ford Powerstroke VT365 system
No price recorded yet.
Berryman

Engine

+16-ounce bottle for a smaller engine oil flush
+Oil change flush cleans the engine between oil changes
+Compact size is easy to store in a garage
−16 ounces may be too little for larger engines
No price recorded yet.
BlueDevil Products

Radiator

+Six-pack provides six one-quart bottles
+Deep cleaning formula for the coolant system
+Works across multiple vehicle types
−Six bottles take more storage space than a single bottle
No price recorded yet.
Irontite

Radiator

+Powder formula in a 16 oz container
+Removes rust, scale, oil and sludge from coolant systems
+Cleans gelled Dex-Cool coolant
−Powder must be mixed before use
No price recorded yet.
Liqui Moly

Engine

+500 ml bottle for flushing engine oil passages
+Designed as an oil additive for engine flushing
+Engine flush formula targets sludge deposits inside the engine
−Small 500 ml volume may not suit larger engines
No price recorded yet.
Lubegard

Transmission

+10 oz container for transmission flushing
+Made for flushing transmission fluid systems
+Compact 10 oz size suits single transmission service
−Smaller 10 oz volume may not cover larger transmissions
No price recorded yet.
Lubegard

Radiator

+16 oz container for radiator flushing
+Kool-It formula designed for radiator cooling systems
+Larger 16 oz volume than many single radiator flush bottles
−Only for radiators, not engine or transmission flushing
No price recorded yet.
Lubegard

Transmission

+Performance pack combines flushing and protection in one kit
+Designed for automatic transmission flushing and protection
+Package offers both flush and protect treatments together
−Only suited to automatic transmissions, not other systems
No price recorded yet.
Gunk

Engine

+Three-pack provides three 32 fl oz treatments
+32 fl oz bottles give substantial volume per treatment
+Engine flush designed for a short five-minute treatment
−Engine flush only, not for radiator or transmission systems
No price recorded yet.
Gunk

Radiator

+11 oz container for radiator flushing
+Designed as a 10-minute radiator flush treatment
+Compact 11 oz size suits single radiator service
−Only for radiators, not engine or transmission flushing
No price recorded yet.
Triax

Engine

+Oil-based formula for engine flushing
+Engine safe formula named on the product
+Removes carbon and sludge deposits, per the name
−Only 16 oz per bottle for larger engines
No price recorded yet.
XADO

Engine

+Targets carbon and engine sludge buildup
+Includes an anti-carbon effect
+Designed as a total flush product
−Small 250ml capacity for one treatment
No price recorded yet.
XADO

Engine

+Removes carbon and sludge from the engine
+Aims to restore oil performance
+250 ml bottle size
−Small 250 ml capacity for one treatment
No price recorded yet.
Generic

Radiator

+Nonflammable liquid formula for safer handling
+Clear liquid, easy to see the flush
+Large 1 gallon size for a full cooling system
No price recorded yet.
Durabasics

Engine

+Includes a high-pressure hose for flushing
+1 gallon of salt remover concentrate
+Made for marine engines
No price recorded yet.
Energy Release

Engine

+Motor oil additive designed as an engine flush and cleaner
+Comes in a 15 oz bottle for a single application
+Clear formula type for engine use
No price recorded yet.
Generic

Engine

+Works with gasoline and diesel vehicles
+500 ml bottle size
+Internal engine cleaner for removing deposits
No price recorded yet.
Engine Ice

Engine

+Two-pack kit covers multiple engine flush jobs
+Works as an engine flush and clean kit
+Includes motorcycle use in the product description
No price recorded yet.
Liqui Moly

Radiator

+Two-pack provides two radiator flush treatments
+Formulated specifically for flushing radiator cooling systems
+Supplies two packs in one purchase for multiple flushes
No price recorded yet.

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Spec scores, pros and cons, and prices are explained in the How it works section of the About page.