Ignoring the warning signs of a seized engine, often caused by corrosion, overheating, or aging, can lead to costly car repairs. Engine jamming is noticeable when the crankshaft halts, components rattle, or bearings freeze. Regular use of penetrating oil can mitigate these issues. In instances of engine seizure, consider a cost-effective solution before opting for immediate repairs. Applying penetrating oil is a convenient method to unjam engine parts. It seeps into small spaces between bearings and bolts, removing dirt and rust, and restoring mobility.
Kano AeroKroil aerosol from Kano Laboratories has been a trusted choice among engine professionals since 1939 for its superior penetrating power. It’s renowned for working deeply and quickly, requiring less torque to free up metal components. AeroKroil’s effectiveness lies in its ability to slide into the smallest openings of stuck engines, threads, and crevices, making it a reliable option for dealing with engine jams. Kano Kroil has a range of penetrating oils with value addition of penetrants with silicon and graphite. Their synthetic penetrating oils work well on the toughest rust to unseize an engine quickly and remove and prevent further rust buildup for longer.
Kroil penetrating oil (KL081) is a perfect match when it comes to tackling carbon deposits. This penetrating oil also works effectively in wet and humid environments because it displaces moisture and salt water, resisting the making of hard gum over time. It dissolves grease, grime, gunk, and all kinds of sticky residues without scratching the engine metal. It comes with a sprayer nozzle that specifically targets the rusted area, but Kroil chemical is harsh on the material, so extra care is required.
A Cadillac owner used three pullers to pull its harmonic balancer, which was not coming off. The owner used WD-40 and Kerosene to pull that off but failed. However, the application of Kroil penetrating oil (KL081) and letting it overnight helped in a complete slide-off.
PB B’laster penetrant is a high-performance formula with a unique capillary action, vowing to loosen up rusted and frozen parts of seized engines by fortified oxidation and rust-proof chemistry. The non-evaporating lubricant used in this oil helps to unseize the engine and protects against further corrosion. Because of its intense wetting property, it lubricates the seized engine by creating a lubricating film on the metal surface after permeation.
B’laster 16-PB Penetrating Catalyst stands out as an effective solution for unseizing engines, thanks to its undiluted, petroleum-based formula. Equipped with a user-friendly sprayer, it easily reaches narrow, hard-to-access metal parts requiring lubrication. What sets this product apart is its compatibility with various metals including brass, copper, and aluminum, without compromising the factory quality finish.
As per a case study, a ‘97 F350 diesel pickup engine got seized in stormy weather while pulling a 32’ freight trailer. Further investigation revealed that its fan belt tensioner pulley got locked, causing a squealing sound. By spraying the B’laster 16-PB Penetrating Catalyst into the bearing of the pulley, the stuck-on part started spinning again, enabling the pickup to drive up to 30 miles further.
3. 3-IN-ONE Fast-Acting Penetrating Oil
3-IN-1 Fast-Acting Penetrant Oil comes from a brand acquired by WD 40 Company in 1995 and has a proven record of solving maintenance problems of automobile engines since 1894. Their engine oils have shown immense strength to lose struck parts and remove corrosion quickly with their fast-acting penetrant technology. Independent laboratory tests showed that their engine oil has 3X more penetrating power to remove rust than competitors.
3-IN-1 Fast-Acting Drip Oil meets 50-state VOC standards that count among the rigorous standards for eliminating volatile compounds (VOCs). It is equally effective on seized engines along with safe use on rubber, plastic, and metal. 3-IN-1 penetrating oil comes in a squeeze bottle design with a Marksman Twist Spout (on and off twist), which helps to avoid overspilling and leaking, making its application precise and easy.
A group of full-time RV travelers highly recommends 3-IN-ONE Fast-Acting Drip Oil, citing its efficacy in quickly loosening their motor engine parts. They attest to always carrying this penetrating oil during long journeys, crediting its swift action on jammed parts and remarkable rust removal properties.
4. Liquid Wrench
Liquid Wrench, an anti-seize formula, unseizes the stuck parts quickly by seeping into unreachable parts of the engine, removing the most rigid rust threads while leaving a thin film behind. It also meets 50 states compliant with zero VOC formula and is proudly 100 % US made, safe on plastic, rubber, and painted surfaces, and has an odor-free composition.
Liquid Wrench L106 Penetrating Oil with Cerflon quickly dissolves to eliminate corrosion and rust, owing to the chemicals used with high lubricity, low solvency, low surface tension, and low viscosity. All these properties combine to bring the best product to unseize your engine. One unique aspect of this penetrating oil is its FlashSight technology, a built-in LED on the bottle near the nozzle that lets you see where you spray precisely.
According to one case study, Liquid Wrench L106 penetrating oil is most effective as it helped fix the seized engine, which was not cranking on inspection. The engine was on zero level with jammed pistons before the cold start. But by opening the spark plugs and pouring down this penetrating oil, jamming frees up, and the engine starts to run swiftly.
Permatex Anti-Seize Lubricant, crafted from a specialized blend of aluminum, copper, and graphite infused in petroleum-based oil, is a heavy-duty solution engineered for high-temperature applications. This unique combination is designed to prevent both seizing and corrosion effectively, ensuring optimal engine performance and longevity. Its effectiveness is guaranteed when assembling and disassembling the engine parts and is also suitable for slow-moving parts.
Permatex 80078 Anti-Seize Lubricant depicts a remarkable ability to resist salt, corrosion, and moisture. Its application on spark plugs, cylinder heads, and exhaust head bolts effectively dissolves rusting. This engine penetrating oil can withstand temperatures up to 1600°F. Its non-aerosol version meets the Mil-Spec #907E. Coming in a plastic bottle with a brush top cap, it allows smoother application on the target area for lubrication and rust removal.
A user reported using Permatex 80078 Anti-Seize Lubricant to assess the cleaning of the carburetor, throttle body, and unpainted metal parts of a seized engine. Permatex lubricant, with its dual-action cleaning system, helps provide a clean carburetor.
Comparison Chart Highlighting Key Aspects for Each Penetrating Oil
|PENETRATING OIL BRAND||PRICE||VOLUME||LUBRICITY||OIL TYPE||VISCOSITY||OVERALL RATING|
|Permatex Anti-seize||Affordable||8 oz.||Very high||Lubricant||Low||9/10|
|Liquid Wrench 106L||Reasonable||6 oz.||Very high||Oil||Low||9/10|
|3-IN-ONE Fast Acting||Most reasonable||4 oz.||High||Oil||Low||8/10|
|Kano Aerokroil||Expensive||16.5 oz.||Very high||Oil||Low||9/10|
|Blaster 16 BP||Affordable||11 oz.||High||Oil||Low||8/10|
For optimal results in unseizing an engine, it’s crucial to apply the best penetrating oils to targeted areas like pistons, bolts, and the crankshaft, particularly where rust and corrosion are evident. When applying these oils, safety is paramount. Always wear suitable personal protective equipment, including safety gloves and goggles, to shield yourself from potential spills and the oil’s potent reaction.
Read about some of the best penetrating oils: Click here.