Calorstat RC0035 Engine Coolant Reservoir Cap - Radiator

Engine Coolant Reservoir Cap for BMW and Land Rover

Calorstat RC0035 is a threaded, pressurized engine coolant reservoir cap built with plastic and rubber for a secure seal on the cooling system. With a 30.0 pressure rating and standard design, it supports proper coolant system pressure control on a wide range of BMW applications and select Land Rover Range Rover models.

Key Features

• Engine coolant reservoir cap with threaded attachment type
• Pressurized design rated to 30.0
• Plastic and rubber construction for sealing performance
• Standard cap type for radiator and coolant reservoir applications
• No pressure release lever
• Calorstat RC0035 replacement part number

Detailed Description

Calorstat RC0035 is an OE-style engine coolant reservoir cap for vehicles that require a threaded, pressurized cap to maintain cooling system pressure. It is listed for radiator applications on later BMW 650i, 650i xDrive, and M6 models, and for broader BMW cooling system coverage across 1995-2018 applications including 3 Series, 5 Series, 7 Series, X3, X5, Z3, Z4, and M models. This part also fits 2003-2004 Land Rover Range Rover, radiator. Vernet is an OE supplier to BMW, and this cap is built to match the pressure-control needs of the original cooling system design.

This part cross-references Febi-Bilstein 31332 and URO 17111712669 for the same application.

What It Is Used For

• Restoring coolant system pressure retention
• Replacing a worn or cracked reservoir cap seal
• Addressing coolant loss from a cap that no longer holds pressure
• Correcting overheating concerns caused by a weak cooling system cap
• Servicing BMW radiator and coolant reservoir cap applications

Installation Notes and Tips

Verify the threaded cap style and pressure rating before installation. Inspect the reservoir neck, sealing surface, and rubber seal for damage or contamination, and replace the cap if the seal is hardened, split, or no longer seats evenly. Confirm vehicle-specific fitment by year, make, model, and position before ordering. Fits 2018-2019 BMW 650i Gran Coupe, radiator; Fits 2018-2019 BMW 650i xDrive Gran Coupe, radiator; Fits 2018-2019 BMW M6 Gran Coupe, radiator; Fits 2018 BMW 650i, radiator; Fits 2018 BMW 650i xDrive, radiator; Fits 2018 BMW M6, radiator.

Quality Assurance

Calorstat RC0035 is built as a pressurized coolant reservoir cap with OE-supplier context from Vernet for BMW applications. Its plastic and rubber construction, threaded attachment, and 30.0 pressure rating support consistent cooling system service across the listed fitments.