The 9 Best Valve cover cleaners (2023 reviews)

The bg valve cover cleaner is capable of outshining several other cleaner featured in this list in overall features. It works well in diesel engines. It will clean out all the junk in your vehicle's fuel system. It is particularly well suited to remove buildup of combustion products on rings and lands of any piston engine. The EPR is added to your engine as an engine flush, to clean your engine just before an oil change. It goes in just before an oil change to lube and clean out your engine. This product is very potent. It is used in between oil changes.

Customers say that getting a gas cleaner, along with cleaner is useful.

Why We Like This:

A must have along with the oil and gas additives
Highly recommend for anybody chasing “ghosts” in their engine
Smoother idle and acceleration, quieter running
Engine does not leak or use a drop of oil

Best For motorcycle: CRC Valve cover Cleaner

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Next on the list, we've got yet another cleaner that manages to win our hearts. It's the crc valve cover cleaner and it's widely considered as one of the best convenient cleaner you can buy. This is exactly what everyone uses to clean their throttle bodies. This product does a great job loosening the carbon buildup. It is about 80% acetone and some accelerant to blow it out of the can. The Throttle body cleaner has a higher temperature to clean the carbon out of your fuel injectors. It is a spray for elements of the Air intake system only. This stuff works wonders, spray down the throttle, wipe it off with a wire brush/pipe cleaner that makes a dirty throttle body work like new.

Why We Like This:

Good for cleaning up an intake butterfly valve
30 minute easy drive on the highway, keeping it under 2500 rpm's
Takes the built carbon right off and dries quickly

Best For After winter: Berryman products Valve cover Cleaner

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The berryman products valve cover cleaner is suitable and reliable and fits well with your daily usage. This product is the best fuel additive on the planet. It is the only fuel system cleaner Project Farm tested that literally ignites and burns clean when flame is applied. It cleans out the gunk and will clean out your fuel line and injector. It is nearly empty and fills the tank up. It is running noticeably better. This definately dissolves some stuff. It is good in vehicles also. It is the best throttle body/carb cleaner out there.

Why We Like This:

Cleans out marine engine and chainsaw engines well
Works in all internal combustion engines
Definitely worthwhile for landscaping and 2-cycle motors

Best For Diesel: Gumout Valve cover Cleaner

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Gumout offers a variety of cleaner for personal choice and yet maintaining quality in all the variants. It cleans and conditions using premium ingredients, like pea (polyether-amine), to help maximize performance, fuel economy and engine life. It tells you all the carbon that is inside the car's cylinder is gone. It is perfect to use for a few tank right before smog check. It is suitable for carburetors, fuel injectors and intake manifolds.

The car overall feels like it does not require as much foot on the pedal, more responsive, even smoother at lower speeds in rush. The best part is that it creates just as spectacular thick white clouds when using it as an induction/top-end cleaner.

Why We Like This:

Keeps fuel lines and engines clean
One of the new comers and featured product

Best For keeping outboards: Mercury marine mercruiser Valve cover Cleaner

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The mercury marine mercruiser valve cover cleaner should be able to handle its purpose and duties with ease. The Mercury Deep Clean 2 Marine is hands down the best injector cleaner. It is designed to clean and decarb motors. It is a fuel system and injector cleaner. It is good for two fill ups. It is a very good addative for optimax direct injection 2 stroke engines and an excellent cleaner.

It can be used in 2 & 4 cycle mercury outboards. The additive will help keep the fuel clean. This, like most cleaning and octane boosting additives should be packaged in a metal container.

Why We Like This:

Must have for the picky dfi motors
Best to leave the boat’s fuel as low as possible
Keeps of carbon mixed with quickcare, super product

Best For boat: chemical guys Valve cover Cleaner

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The chemical guys valve cover cleaner is the best convenient cleaner on the market today. The Signature series orange degreaser is perfect for removing heavy mud, dirt, and grime from your off-road and 4x4 vehicles. It is tough enough to clean tough dirt and grime but gentle for rims and wheels. It is made for super easy wipe off with little streaking. The powerful formula is great at cleaning greasy suspension and differential parts leaving every inch of your car or truck looking great all year round.

Orange degreaser foaming agents help remove tough dirt and grime from the surfaces to avoid scratching sensitive areas. It removes automotive grease extremely well, and applies very well with its spray bottle.

Why We Like This:

Great de-greaser, easy to make it go a long way
Cuts grease and oil off with no problem
Works amazingly well, even better than kerosene on greasy machinery

Best For Injection System: Liqui Moly Valve cover Cleaner

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The liqui moly valve cover cleaner is capable of outshining several other cleaner featured in this list in overall features in its price range. The cleaner with the highest percentage of pea is the fuel system cleaner made by redline. It has both direct injection and port injection to overcome the carbon buildup on intake valves. This helps boost the octane rating of the gas by 1 to 2 points and makes the engine run smoother.

This product will only clean intake valves by adding it to the fuel tank of non direct injection engines. The fuel injector doesn’t spray any fuel thru the intake valves. The valve clean goes in the gas tank, and engine flush goes in oil so you should be. It can be done on a full tank of gas. It would take many bottles to do any significant cleaning.

Why We Like This:

Improved mileage and cleaned the valves
Great product, made car run smother and more efficient
Great job at cleaning up a slight knock
Works great and keeps the fuel system clean

Best Injector Cleaner: Red line Valve cover Cleaner

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The red line valve cover cleaner is specially designed for your regular usage and has all useful features. This is one of the best Fuel System cleaners. Not only does it clean your engine, but it gives you more miles to the gallon. It has the highest concentration of pea. The sound is louder but its like a healthier, more powerful sound. It cleans and grants more miles per gallon. The tires are not having trouble keeping up with an extra power boost. It will keep the car running better.

Why We Like This:

Great for old and new cars
Definitely makes the car run smoother and improves fuel efficiency
Better acceleration and fuel economy when used
Simply the best fuel system treatment available

Best For Engine bay: Kraken bond Valve cover Cleaner

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Kraken engine cleaner is a great product for removing burned oil from around the edges of your valve covers or the dirt cooked onto the top of the engine cover. It provides a wonderful view and protects the engine. It's not foamy and has more like the consistency of brake cleaner than an engine cleaner type degreaser. It is suitable for automobiles, motorcycles, machines, and all types of engines, such as lawnmowers.

It's designed to remove deposits that might cause rough idle, stalling, hesitation, pings, rust, dirt, and engine run-on. It does have that throat tickling irritation that most degreasers have. It's definitely not brake cleaner though and would probably leave a squeak inducing residue if used on brakes.

Why We Like This:

Easy to use, just spray on you dirty engine parts
Contain ozone-friendly propellants that do not harm the environment
Lot of satisfied buyers

The 9 Best Valve cover cleaners (2023 reviews)

Our Top Picks:

Best Overall: BG Valve cover Cleaner

Best For motorcycle: CRC Valve cover Cleaner

Best For After winter: Berryman products Valve cover Cleaner

Best For Diesel: Gumout Valve cover Cleaner

Best For keeping outboards: Mercury marine mercruiser Valve cover Cleaner

Best For boat: chemical guys Valve cover Cleaner

Best For Injection System: Liqui Moly Valve cover Cleaner

Best Injector Cleaner: Red line Valve cover Cleaner

Best For Engine bay: Kraken bond Valve cover Cleaner

5 Best Gas cleaners