HomeBelts and Cooling > Hoses and PipesGates CO34955 Engine Coolant Filler Neck
Part #: CO34955

Gates CO34955 Engine Coolant Filler Neck

Coolant Outlet
⚙️ 47 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Coolant Outlet
🚗Fitment: Mitsubishi, Lancer, Outlander, and Outlander Sport
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Gates Coolant Outlet CO34955

The Gates Coolant Outlet CO34955 is a durable engine coolant filler neck designed for select Mitsubishi vehicles. Engineered from plastic, this coolant filler neck includes a 16 psi radiator cap and is compatible with Mitsubishi Lancer, Outlander, and Outlander Sport models.

  • Constructed from high-quality plastic material for corrosion resistance
  • Includes a 16 psi radiator cap for proper pressure regulation
  • Features two bolt holes for secure mounting
  • Multiple outlet diameters: outside diameters of 1.39, 0.6, and 0.35 inches
  • Inside outlet diameters of 1.18, 0.41, and 0.23 inches for precise fitment
  • Designed specifically for Mitsubishi Lancer, Outlander, and Outlander Sport

About the Gates Coolant Outlet Product Line

The Gates Coolant Outlet line focuses on reliable cooling system components that maintain optimal engine temperature and fluid containment. This product line includes coolant filler necks engineered to meet the demands of modern vehicles, ensuring proper coolant flow and pressure management. The CO34955 model exemplifies this line by combining material durability with precise fitment for Mitsubishi vehicles.

Detailed Product Description

The Gates CO34955 engine coolant filler neck is manufactured from plastic, providing resistance to corrosion and heat exposure common in engine compartments. It features multiple outlet diameters, including outside diameters of 1.39, 0.6, and 0.35 inches, and inside diameters of 1.18, 0.41, and 0.23 inches, allowing for compatibility with various hose sizes and connections. The part includes two bolt holes for secure installation but does not come with gaskets or seals. The integrated 16 psi radiator cap helps maintain the correct pressure within the cooling system, preventing overheating and coolant loss. This part is not an exact OE replacement but is designed to fit Mitsubishi Lancer, Outlander, and Outlander Sport models requiring this specific coolant filler neck configuration.

Common Applications and Issues Addressed

  • Replacement of cracked or damaged coolant filler necks
  • Resolving coolant leaks around the filler neck area
  • Maintaining proper cooling system pressure with the included 16 psi radiator cap
  • Preventing engine overheating due to faulty coolant containment
  • Ensuring secure coolant hose connections with multiple outlet diameters

Installation Notes and Tips

When installing the Gates CO34955 coolant filler neck, ensure the mounting surface is clean and free of debris. Use the two bolt holes to securely fasten the filler neck to the engine. Verify that the radiator cap is properly seated to maintain system pressure. Since this part does not include gaskets or seals, inspect existing components for wear and replace as necessary to prevent leaks. Confirm compatibility with your Mitsubishi Lancer, Outlander, or Outlander Sport before installation.

Quality Assurance

Gates is a recognized manufacturer of automotive cooling components, and the CO34955 coolant filler neck is built to meet industry standards for durability and performance. While this part is not an exact OE replacement, it is engineered to provide reliable service in compatible Mitsubishi vehicles. Warranty information should be confirmed with the distributor or retailer at the time of purchase.

BrandGates
Part NumberCO34955
PositionCoolant Outlet
MaterialPlastic
Outlet Outside Diameter.35
Outlet Outside Diameter.6
Outlet Outside Diameter1.39
Bolt Hole Quantity2
TypeCoolant filler neck
Gasket Quantity0
Outlet Inside Diameter.23
Outlet Inside Diameter.41
Outlet Inside Diameter1.18
98410
9848No
By-Pass HolesNo
ContentsCoolant filler neck w/ 16 psi radiator cap
ContentsCoolant filler neck, 16 psi radiator cap
Number of Bolt Holes2
Number of Gaskets0
Number of Seals0
OE ExactNo
Outlet Inside Diameter 1 (in)1.18
Outlet Inside Diameter 2 (in)1.18
Outlet Inside Diameter 3 (in).41
Outlet Inside Diameter 4 (in).23
Outlet Outside Diameter 1 (in)1.39
Outlet Outside Diameter 2 (in)1.39
Outlet Outside Diameter 3 (in).6
Outlet Outside Diameter 4 (in).35
TypeCoolant filler neck w/ cap

This part fits 47 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2020MitsubishiOutlander Sport2.0LL4GASN/ACoolant Outlet
2019MitsubishiOutlander2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2019MitsubishiOutlander Sport2.0LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2019MitsubishiOutlander Sport2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2018MitsubishiOutlander Sport2.0LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2018MitsubishiOutlander Sport2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2017MitsubishiLancer2.0LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2017MitsubishiLancer2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2017MitsubishiOutlander Sport2.0LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2017MitsubishiOutlander Sport2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2016MitsubishiLancer2.0LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2016MitsubishiLancer2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2016MitsubishiOutlander Sport2.0LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2016MitsubishiOutlander Sport2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2015MitsubishiLancer2.0LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2015MitsubishiLancer2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2015MitsubishiOutlander2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2015MitsubishiOutlander Sport2.0LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2015MitsubishiOutlander Sport2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2014MitsubishiLancer2.0LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2014MitsubishiLancer2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2014MitsubishiOutlander2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2014MitsubishiOutlander Sport2.0LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2013MitsubishiLancer2.0LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2013MitsubishiLancer2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2013MitsubishiOutlander2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2013MitsubishiOutlander3.0LV6GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2012MitsubishiLancer2.0LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2012MitsubishiLancer2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2012MitsubishiOutlander2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2012MitsubishiOutlander3.0LV6GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2011MitsubishiLancer2.0LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2011MitsubishiLancer2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2011MitsubishiOutlander2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2011MitsubishiOutlander3.0LV6GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2011MitsubishiOutlander Sport2.0LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2010MitsubishiLancer2.0LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2010MitsubishiLancer2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2010MitsubishiOutlander2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2010MitsubishiOutlander3.0LV6GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2009MitsubishiLancer2.0LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2009MitsubishiOutlander2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2009MitsubishiOutlander3.0LV6GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2008MitsubishiLancer2.0LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2008MitsubishiOutlander2.4LL4GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2008MitsubishiOutlander3.0LV6GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet
2007MitsubishiOutlander3.0LV6GASN/ACoolant Fill Flange; 16 psi Pressure Rating; Coolant Outlet

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

1350A015

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.