Dorman 82598 Engine Coolant Reservoir Cap

Reliable Engine Coolant Reservoir Cap for Mercury and Nissan Vehicles

The Dorman 82598 engine coolant reservoir cap is designed to provide a secure seal for the coolant reservoir in select Mercury and Nissan models. Engineered with durable plastic and a twist-on attachment, this cap ensures proper containment of coolant without pressurization features.

Key Features of the Dorman 82598 Coolant Reservoir Cap

• Constructed from durable black plastic for corrosion resistance
• 38.1 mm diameter fits specific Mercury Quest and Nissan Villager reservoirs
• Twist-on attachment type for easy installation and removal
• Non-vented and non-pressurized design suitable for reservoir applications
• Compact dimensions: 1.5 inches wide and 0.5 inches in length

Detailed Product Description

The Dorman 82598 engine coolant reservoir cap is a precision replacement part compatible with Mercury Quest and Nissan Villager models. Made from sturdy plastic, this black cap measures 38.1 mm in diameter and features a twist-on design that securely fastens to the coolant reservoir. Unlike radiator caps, this reservoir cap does not include a pressure release lever or venting, as it is intended to maintain a sealed environment without pressurization. Its compact size and reliable fitment help maintain the integrity of the coolant system by preventing leaks and contamination.

Common Applications and Issues Addressed

• Prevents coolant leaks from the reservoir tank
• Maintains proper coolant levels by sealing the reservoir
• Replaces worn or damaged reservoir caps on Mercury Quest and Nissan Villager
• Helps avoid overheating caused by coolant loss
• Eliminates contamination entry into the coolant system

Installation Notes and Tips

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

Quality Assurance and Warranty Information

Dorman parts are manufactured to meet or exceed OEM specifications for fit and function. The 82598 engine coolant reservoir cap undergoes quality control testing to ensure durability and reliable performance. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in material and workmanship.