Minimize or eliminate fuel odors with this fuel vapor canister, which filters hydrocarbons from fumes released during daytime thermal fuel expansion and tank refueling. The canisters are purged when fresh air is drawn into the tank during thermal contraction or while the engine is running, returning the hydrocarbon molecules to the fuel.
- Spring loaded volume compensator compresses carbon to prevent carbon bed erosion due to vibrations, temperature changes and volume changes.
- Heavy wall, elliptically shaped body enhance durability and pressure resistance.
- Large surface area filters located at each end of the canister minimize airflow restrictions while keeping carbon in place.
- "Floating Bracket" simplifies installation, reduces torque transmission and protects end caps from heat.
- Durable polymer body with welded end caps and 5/16" vent hose connection.
- Designed to withstand a temperature range from -104 to 176 degrees Farenheit.
- The canister can be mounted in any orientation.
- If the canister is mounted in the engine compartment, use the heat shield version here.
- 1/2 Liter Capacity - Works with tanks up to 62 Gallons
- 9.85" Long x 3.8" Wide x 2.9" High
- Made in the USA
This canister functions as a hydrocarbon vapor control device. If liquid, such as water or gasoline, enters the canister, it will coat the carbon and hinder its ability to capture gasoline vapors. Although a single instance of liquid entering the canister won’t damage the carbon, a poorly designed system that repeatedly allows liquid inside will impair the canister’s functionality.
Why a Volume Compensator is Needed in a Vapor Canister
- Preventing Carbon Bed Erosion. Vapor canisters contain activated carbon to absorb fuel vapors and prevent their release into the atmosphere. Over time, vehicle vibrations, temperature changes, and motion can cause the carbon particles to shift and erode against each other. This erosion can create open flow paths, allowing hydrocarbon vapors to escape without being adsorbed, leading to increased emissions or diagnostic trouble codes (DTCs). A volume compensator, applies consistent pressure to keep the carbon bed tightly packed, reducing movement and erosion.
- Maintaining Absorption Efficiency. A loosely packed carbon bed can develop gaps or channels, reducing the canister’s ability to effectively capture and store fuel vapors. The volume compensator ensures the carbon remains compact, maintaining its adsorption capacity throughout the canister’s lifespan. This is critical for meeting emissions regulations and preventing “bleed emissions” (hydrocarbon vapors escaping due to migration within the canister).
- Accommodating Volume Changes. Temperature fluctuations and thermal expansion/contraction of the canister can alter the internal volume. The volume compensator adjusts to these changes by using a spring or similar mechanism to maintain consistent pressure on the carbon bed, ensuring it remains stable and effective.
- Preventing System Failures. Without a volume compensator, the carbon bed’s degradation could lead to clogs, reduced airflow, or pressure issues in the EVAP system, potentially causing problems like difficulty refueling, check engine lights, or failed emissions tests.
- Increased Canister Lifespan. Without a volume compensator erosion of the carbon bed can render the canister ineffective sooner, requiring earlier replacement.
