Dorman 54231 Engine Coolant Reservoir Cap

Overview of Dorman Engine Coolant Reservoir Cap 54231

The Dorman Engine Coolant Reservoir Cap 54231 is designed specifically for Lexus GS300 and GS400 models. This black plastic cap features a twist type, screw-on attachment that ensures a secure fit while allowing for vented pressure regulation without a pressure release lever.

• Material: Durable black plastic construction
• Diameter: 66 mm for precise fitment
• Attachment Type: Screw-on for secure installation
• Type: Twist cap design for easy handling
• Vented: Yes, allows proper coolant system ventilation
• Pressurized: No, designed for non-pressurized reservoir systems
• Dimensions: 2.60 inches in length and width
• Package Contents: Includes one engine coolant reservoir cap

Detailed Product Description

The Dorman 54231 engine coolant reservoir cap is engineered to meet the specifications required by Lexus GS300 and GS400 vehicles. Constructed from high-quality plastic, this cap provides a reliable seal for the coolant reservoir while allowing air to vent properly, preventing vacuum lock and maintaining optimal coolant flow. Its 66 mm diameter and 2.60-inch dimensions ensure compatibility with the designated Lexus models. The twist-type, screw-on design facilitates straightforward installation and removal without the need for additional tools. This cap does not include a pressure release lever and is intended for use in non-pressurized coolant reservoir systems, making it suitable for maintaining the integrity of the cooling system in these Lexus vehicles.

Common Applications and Problem Resolution

• Prevents coolant leaks caused by worn or damaged reservoir caps
• Maintains proper coolant system ventilation to avoid overheating
• Replaces cracked or broken caps that compromise coolant containment
• Ensures correct fitment for Lexus GS300 and GS400 coolant reservoirs
• Helps avoid vacuum lock issues in the cooling system

Installation Notes and Tips

When installing the Dorman 54231 engine coolant reservoir cap, ensure the reservoir neck is clean and free of debris to achieve a proper seal. Align the cap correctly and twist clockwise until securely fastened. Avoid overtightening to prevent damage to the cap or reservoir threads. This cap is designed for easy hand installation and removal, making routine coolant system maintenance straightforward.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 54231 engine coolant reservoir cap undergoes quality checks to ensure durability and reliable performance in Lexus GS300 and GS400 vehicles. Warranty coverage details can be obtained from the product packaging or Dorman’s official documentation.