Victor Reinz 71-13578-00 Engine Coolant Thermostat Housing Seal

OE-Style Thermostat Housing Seal

Victor Reinz 71-13578-00 is an engine coolant thermostat housing seal made from molded rubber for a precise sealing fit. Built for OE-quality sealing performance, it supports dependable coolant system service on a wide range of GM, Cadillac, Chevrolet, and GMC applications.

This seal is used on vehicles such as Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade models where a reliable thermostat housing seal is needed to maintain cooling system integrity.

Key Features

• Molded rubber construction for consistent sealing performance
• Outside diameter: 2.335
• Thickness: 0.2320
• Color may vary
• OE-quality gasket technology from Victor Reinz
• Part number 71-13578-00 for accurate identification

Detailed Description

Victor Reinz 71-13578-00 thermostat housing seal is engineered for vehicles that require a dependable coolant seal at the thermostat housing. As an original equipment supplier, Victor Reinz focuses on sealing solutions that match OE-level design and material standards. The molded rubber construction helps provide a stable seal where coolant passages meet the housing, supporting proper cooling system operation across many GM-based platforms.

Cross-reference part numbers include FEL-PRO 35720 and MAHLE C31823 for the same application. The 71-13578-00 seal is a practical choice for service work on Chevrolet Corvette, GMC Yukon, and Cadillac CTS models, as well as many other listed applications.

What This Part Helps Address

• Coolant seepage at the thermostat housing
• Visible coolant residue around the housing joint
• Loss of sealing integrity after thermostat service
• Cooling system leaks that can affect temperature control
• Repeat repairs caused by worn or flattened seals

Installation Notes and Tips

• Clean the thermostat housing and mating surfaces before installation.
• Inspect the housing for corrosion, pitting, or warpage before reassembly.
• Verify the seal seats evenly in the groove or mating surface.
• Use the vehicle’s service procedure for coolant refill and bleed steps.
• Confirm fitment by year, make, and model before ordering.

Quality Assurance

Victor Reinz is an OE supplier known for gasket and sealing technology used across foreign and domestic vehicles. Part number 71-13578-00 is built to support long-lasting repairs with the correct sealing components for the application.