HomeBelts and Cooling > Hardware, Fasteners and FittingsDorman 54222 Engine Coolant Reservoir Cap
Part #: 54222

Dorman 54222 Engine Coolant Reservoir Cap

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⚙️ 3 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Cadillac, Seville
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Reliable Engine Coolant Reservoir Cap for Cadillac Seville

The Dorman 54222 engine coolant reservoir cap is designed specifically for Cadillac Seville models, providing a secure and vented seal for your vehicle's cooling system. Crafted from durable plastic, this twist-type cap ensures proper pressure regulation and coolant containment.

Key Features of Dorman 54222 Coolant Reservoir Cap

  • Material: High-quality plastic construction for durability and corrosion resistance
  • Diameter: 49.6 mm, designed to fit Cadillac Seville coolant reservoirs precisely
  • Maximum Pressure Rating: 16 psi to maintain optimal cooling system pressure
  • Attachment Type: Threaded for secure and easy installation
  • Type: Twist cap with vented and pressurized design to allow controlled pressure release
  • Color: Black finish for a clean, OEM appearance
  • Dimensions: 3.3 inches in both length and width for compact fitment

Detailed Description of the Dorman 54222 Coolant Cap

This engine coolant reservoir cap from Dorman is engineered to meet the specific requirements of Cadillac Seville vehicles. The vented and pressurized design helps maintain the correct pressure within the cooling system, preventing overheating and coolant loss. The threaded, twist-type cap allows for straightforward installation and removal without compromising the seal. Its plastic material resists corrosion and withstands the heat and chemical exposure typical in engine compartments.

Common Issues Addressed by This Coolant Reservoir Cap

  • Prevents coolant leaks caused by worn or damaged caps
  • Maintains proper pressure to avoid engine overheating
  • Reduces risk of coolant contamination through a secure seal
  • Helps prevent air from entering the cooling system
  • Ensures venting to avoid pressure buildup and potential hose damage

Installation Notes and Tips

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

Quality Assurance and Warranty Information

Dorman parts are manufactured to meet or exceed OEM specifications, ensuring reliable performance for your Cadillac Seville. The 54222 engine coolant reservoir cap undergoes rigorous quality control to provide consistent pressure regulation and durability. Warranty coverage details can be obtained from the product packaging or Dorman's official documentation.

BrandDorman
Part Number54222
Attachment TypeThreaded
ColorBlack
Diameter49.6
Length (In)3.3 in
MaterialPlastic
Maximum Pressure Rating16
Package Contents1 Coolant Cap
Pressure Release LeverNo
PressurizedYes
TypeTwist
VentedYes
Width (in)3.3 in

This part fits 3 vehicles. Search below:

YearMakeModelPositionNotes
2004CadillacSevilleN/AFits washer fluid reservoir cap on automatic transmission vehicles.
2003CadillacSevilleN/AFits washer fluid reservoir cap on automatic transmission vehicles.
2002CadillacSevilleN/AFits washer fluid reservoir cap on automatic transmission vehicles.

* 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:

25730223

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