Harley Oil Breather problems have become a prevalent issue for many motorbike enthusiasts globally, impacting the motorcycle’s performance and longevity.
The recurring issue often leads to oil leaks, affecting the bike’s efficiency and causing potential safety hazards.
In this article, we will dive into the intricacies of these problems, offering insights into their causes, implications, and potential solutions.
Harley Oil Breather Problems
Harley oil breather problems are a common issue experienced by many motorcycle enthusiasts around the world.
These problems often result in excessive oil blowback, leading to oil leakage and potentially damaging the engine over time.
While it’s a common occurrence in many models of Harley motorcycles, it’s crucial to address these issues promptly to ensure the longevity and performance of your ride.
1. Oil Leakages
The oil breather system, designed to remove blow-by gases, can sometimes malfunction, leading to several complications.
When the oil breather system is not working correctly, the crankcase pressure can build up, forcing oil into the air cleaner and leading to oil leaks.
The motorcycle may also display poor performance and decreased fuel efficiency. In severe cases, it could result in engine damage.
To resolve the oil breather problem, start by checking for clogs in the breather system. Remove and clean the breather tubes and replace them if they’re worn out.
Also, check the air cleaner, as it’s often the first place you’ll find excess oil.
Regular oil changes and using the correct grade of oil can also go a long way in preventing breathing problems.
The Harley Oil Breather Problem can be a nuisance and potentially harmful to your motorcycle’s functionality.
2012 Harley Oil Breather Problems
The 2012 Harley Oil Breather, as with any motorcycle component, is not without its problems.
Harley owners have frequently reported oil blowback issues, where oil is expelled from the breather and onto other parts of the bike, causing a mess.
This problem is typically caused by excessive crankcase pressure, which allows oil to bypass the breather and exit via the air cleaner.
This can be due to several factors, such as worn piston rings, high oil levels, or inadequate venting.
To fix the issue, begin by checking your oil levels. Overfilled oil can increase pressure within the crankcase, pushing oil out of the breather.
Ensure the oil level is within the manufacturer’s recommended range.
Next, inspect the piston rings and cylinder walls. If these are worn or damaged, they can allow combustion gases to leak into the crankcase, increasing the pressure.
This may require a more extensive engine overhaul, so it’s best to consult with a professional mechanic.
Finally, improved venting can help alleviate the problem. Upgrading to a high-performance breather kit can help reduce the amount of oil blowback.
These kits usually have better baffling systems and filters to prevent oil from escaping.
2013 Harley Oil Breather Problems
One of the common problems reported by riders related to the 2013 oil breather is that it is not functioning properly.
The oil breather, part of the crankcase ventilation system, can sometimes malfunction, leading to an array of problems.
When the oil breather is not functioning correctly, it can allow oil to escape the system, creating a messy and potentially dangerous problem.
The oil can leak into the engine and exhaust system, causing unsightly stains and an unpleasant burning smell. In worst scenarios, it can also lead to a fire risk.
To rectify the problem, check the crankcase breather valve for blockages. These can occur due to dirt, debris, or breakdown of internal components.
Cleaning or replacing the valve can often solve the issue. However, if the problem persists, it might be an indication of more serious issues within the crankcase ventilation system.
Keep in mind that neglecting such an issue can lead to increased pressure within the engine, causing damage to seals and gaskets and resulting in more severe and costly repairs.
2021 Harley Oil Breather Problems
One common problem is oil leakage from the air cleaner, often caused by an overfilled oil tank or a malfunctioning oil breather system.
When diagnosing these issues, start with a visual inspection of the oil breather system. Look for any signs of damage to the breather valves or tube.
Next, check the oil level in the tank. Overfilled oil can cause excess pressure in the system, forcing the oil out through the breather.
If the oil level is correct, yet the problem persists, it’s likely due to a faulty breather system.
Upon confirming a faulty breather, replacement of the entire system or its components may be necessary.
After replacement, monitor the motorcycle for a few rides to confirm that the problem has been resolved.
Harley Twin Cam crankcase breather problems
The crankcase breather system is designed to regulate the pressure within the engine and prevent oil leaks.
However, issues may arise due to the Twin Cam’s particular design. One of the common problems faced by owners is related to the excessive oil blow-by.
It occurs when the pressure in the crankcase becomes too high, pushing oil up through the breather system and out of the engine.
This not only reduces the efficiency of your Harley but also leads to unsightly oil leaks.
Another issue pertains to the breather’s location, which is in the heads rather than the traditional location in the cam chest.
This placement can result in oil carryover into the air cleaner, leading to a reduction in engine performance and potential damage over time.
It’s essential to regularly check the breather system and clean or replace the filters.
Upgraded breather systems designed for the Twin Cam engine that reduce oil carryover are available. However, in severe cases, a more detailed intervention might be required.
Modifying the engine’s internal components, such as installing a taller breather gear, can improve the breather system’s performance.
What causes oil to come through the breather?
Oil coming through the breather in a motorcycle like a Harley can be attributed to several factors.
One of the common problems that causes oil to leak through the breather is overfilling the oil reservoir, which forces oil to escape through the breather.
Another culprit could be worn piston rings, allowing excessive oil to be pushed into the combustion chamber, which finds its way to the breather.
A malfunctioning PCV (Positive Crankcase Ventilation) valve can also cause oil to pass through the breather.
This valve helps regulate the flow of the crankcase vapors, and if it’s not operating correctly, it can result in oil leakage through the breather.
Talha Younas, the brains behind the influential motorcycle-focused website, TwoWheller.com, is a dedicated and passionate advocate for biking culture. Born and raised in a family of motorcycle enthusiasts, his love for two-wheeled transportation was ignited at an early age. His commitment to providing in-depth reviews and helpful tips for riders has established him as a respected figure in the motorcycle community.
