HomeBelts and Cooling > Hardware, Fasteners and FittingsDorman 54227 Engine Coolant Reservoir Cap
Part #: 54227

Dorman 54227 Engine Coolant Reservoir Cap

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⚙️ 31 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Acura and Honda, RDX, RSX, EL, Civic, CR-V, Accord, and Prelude
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Reliable Engine Coolant Reservoir Cap for Acura and Honda Vehicles

The Dorman 54227 engine coolant reservoir cap is designed to provide a secure seal for your vehicle's coolant system. Engineered with durable plastic and a threaded attachment, this cap ensures proper fitment and function for select Acura and Honda models.

Key Features of the Dorman 54227 Coolant Reservoir Cap

  • Constructed from durable plastic material for corrosion resistance
  • 31 mm diameter with a 1.5 inch length and width for precise fit
  • Threaded attachment type for secure installation
  • Twist-type cap design for easy removal and replacement
  • Non-vented and non-pressurized to match original equipment specifications
  • Compatible with Acura and Honda models including Accord, Civic, CR-V, EL, Prelude, RDX, and RSX

Detailed Description of the Dorman 54227 Coolant Cap

This engine coolant reservoir cap from Dorman is manufactured to meet the exact specifications required for proper coolant system operation in various Acura and Honda vehicles. The plastic construction offers resistance to heat and chemical exposure commonly found in engine compartments. Its 31 mm diameter and 1.5 inch dimensions ensure a precise fit on the coolant reservoir, while the threaded, twist-type design allows for secure attachment and easy maintenance. The cap is non-vented and non-pressurized, aligning with the original equipment design to maintain system integrity without pressure release features.

Common Applications and Issues Addressed

  • Prevents coolant leaks by providing a tight seal on the reservoir
  • Maintains proper coolant system pressure and fluid levels
  • Replaces worn or damaged caps that may cause overheating
  • Helps avoid contamination of the coolant system
  • Ensures compatibility with Acura and Honda coolant reservoirs for reliable performance

Installation Notes and Tips

  • Ensure the reservoir neck is clean and free of debris before installation
  • Align the threaded cap carefully and twist until securely tightened
  • Do not overtighten to avoid damaging the plastic threads
  • Check for leaks after installation by running the engine and inspecting the cap area

Quality Assurance and Warranty Information

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 54227 engine coolant reservoir cap undergoes quality control inspections to ensure durability and reliability. Warranty coverage details can be obtained from the product packaging or Dorman's official documentation.

BrandDorman
Part Number54227
Attachment TypeThreaded
ColorWhite
Diameter31
Length (In)1.5 in
MaterialPlastic
Package Contents1 Coolant Cap
Pressure Release LeverNo
PressurizedNo
TypeTwist
VentedNo
Width (in)1.5 in

This part fits 31 vehicles. Search below:

YearMakeModelSubmodelPositionNotes
2012AcuraRDXN/APackaging Type: Bag
2011AcuraRDXN/APackaging Type: Bag
2010AcuraRDXN/APackaging Type: Bag
2009AcuraRDXN/APackaging Type: Bag
2008AcuraRDXN/APackaging Type: Bag
2007AcuraRDXN/APackaging Type: Bag
2006AcuraRSXN/APackaging Type: Bag
2005AcuraELN/APackaging Type: Bag
2005AcuraRSXN/APackaging Type: Bag
2005HondaCivicN/APackaging Type: Bag
2004AcuraELN/APackaging Type: Bag
2004AcuraRSXN/APackaging Type: Bag
2004HondaCivicN/APackaging Type: Bag
2004HondaCR-VN/APackaging Type: Bag
2003AcuraELN/APackaging Type: Bag
2003AcuraRSXN/APackaging Type: Bag
2003HondaCivicN/APackaging Type: Bag
2003HondaCR-VN/APackaging Type: Bag
2002AcuraELN/APackaging Type: Bag
2002AcuraRSXN/APackaging Type: Bag
2002HondaCivicN/APackaging Type: Bag
2002HondaCR-VN/APackaging Type: Bag
2001AcuraELN/APackaging Type: Bag
2001HondaCivicN/APackaging Type: Bag
1989HondaAccordN/APackaging Type: Bag
1988HondaAccordN/APackaging Type: Bag
1987HondaAccordN/APackaging Type: Bag
1987HondaPrelude2.0 SiN/APackaging Type: Bag
1986HondaAccordN/APackaging Type: Bag
1986HondaPrelude2.0 SiN/APackaging Type: Bag
1985HondaPrelude2.0 SiN/APackaging Type: Bag

* 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:

19109PH1620

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