Mahle C31509 Engine Coolant Thermostat Housing Gasket - Rear

Mahle C31509 Thermostat Housing Gasket

The Mahle C31509 engine coolant thermostat housing gasket is an OEM-standard sealing solution for Mitsubishi, Chrysler, and Dodge applications that require a precise coolant seal. Built with beaded paper gasket material, it is designed for thermostat case and coolant port service where reliable sealing is critical.

Key Features

• Beaded paper gasket material for controlled sealing at the thermostat housing
• OEM standard item grade for factory-style fit and function
• Engine coolant thermostat housing gasket for cooling system service
• Mahle sealing product backed by OE-focused manufacturing standards
• Part number C31509 for easy identification and ordering

Detailed Description

Mahle C31509 is an engine coolant thermostat housing gasket used in cooling system repairs on vehicles such as the Mitsubishi Outlander, Mitsubishi Eclipse, and Mitsubishi Galant, along with select Chrysler Sebring and Dodge Stratus applications. This gasket is specified for rear thermostat case and cylinder head coolant port locations in many of the listed vehicles, helping maintain a proper seal between mating surfaces. This part cross-references FEL-PRO 35589 for the same application.

As an OEM-standard gasket, C31509 is built for service work where the original sealing profile matters. The beaded paper construction supports consistent compression and sealing performance in thermostat housing and coolant passage applications. If you are replacing a leaking thermostat case gasket on a Mitsubishi Outlander, Eclipse, Endeavor, or Montero, Mahle C31509 provides the correct sealing component for the job.

Common Problems This Part Can Address

• Coolant seepage at the thermostat housing or thermostat case
• External leaks at the rear coolant port or cylinder head coolant port
• Loss of sealing after thermostat service or cooling system repair
• Moisture or residue forming around the thermostat housing joint
• Improper sealing caused by a worn or damaged original gasket

Installation Notes and Tips

• Clean both mating surfaces thoroughly before installation.
• Inspect the thermostat housing and cylinder head sealing faces for corrosion, pitting, or old gasket material.
• Verify the gasket orientation matches the thermostat case or coolant port design before assembly.
• Use the vehicle fitment details to confirm the correct rear or N/A position for your application.
• Confirm the part number C31509 against the original gasket before reassembly.

Quality Assurance

Mahle gaskets are engineered as sealing products trusted by OEMs and technicians worldwide. C31509 is an OEM-standard replacement designed for dependable cooling system sealing in the listed Mitsubishi, Chrysler, and Dodge applications.