Fel-Pro 5021 Engine Coolant Thermostat Housing Gasket - Housing To Cylinder Head

Brand Fel-Pro 5021
Position Housing To Cylinder Head
Fits Chevrolet, GMC, and Pontiac · 48 vehicles

Premium grade. Application-specific materials deliver dependable sealing performance.

Thermostat housing gasket. Provides a precise seal for the cooling system housing.

Fel-Pro sealing solutions. Trusted by professionals for performance and durability.

Cross-references Haynes 25040, 25138 and 25148 for the same application. See all 9.

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Fel-Pro 5021 Thermostat Housing Gasket

Fel-Pro 5021 is an engine coolant thermostat housing gasket built for direct sealing performance in classic Chevrolet and Pontiac applications. It uses application-specific materials to help deliver a reliable seal where the thermostat housing meets the engine coolant passage.

Key Features

  • Premium-grade thermostat housing gasket for engine coolant sealing
  • Application-specific material selection for the listed vehicle applications
  • Designed for 100% vehicle sealing at the thermostat housing interface
  • 2 mounting holes for the specified housing pattern
  • Fits classic Chevrolet Bel Air, Impala, El Camino, Corvette, and Pontiac Laurentian and Parisienne applications

Detailed Description

Fel-Pro 5021 thermostat housing gasket is made for owners and technicians servicing older cooling systems that require a precise seal at the thermostat housing. Fel-Pro’s sealing approach focuses on matching gasket material to the application, helping maintain coolant containment and stable thermostat housing sealing on vehicles such as the Chevrolet Bel Air, Chevrolet Impala, and Chevrolet Corvette. This part number, 5021, is also listed for Pontiac Laurentian and Pontiac Parisienne applications, along with the Chevrolet El Camino.

This part cross-references Haynes 25040 for the same application.

What It Is Used For

  • Replacing a leaking thermostat housing gasket
  • Restoring a coolant-tight seal at the thermostat housing
  • Addressing coolant seepage around the housing flange
  • Servicing cooling system leaks on classic Chevrolet and Pontiac engines
  • Supporting proper thermostat housing reassembly after maintenance

Installation Notes and Tips

Clean both sealing surfaces thoroughly before installation and remove old gasket material, corrosion, and coolant residue. Verify the thermostat housing and mating surfaces are flat and free of damage before installing Fel-Pro 5021. Use the correct torque sequence for the housing fasteners and refill the cooling system with the proper coolant after service.

Quality Assurance

Fel-Pro gaskets are engineered for vehicle-specific sealing performance using materials selected for the application. Part number 5021 is a premium-grade gasket built to support dependable sealing in the listed classic Chevrolet and Pontiac cooling system applications.

This part fits 48 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
1962ChevroletBel Air3.8LL6N/A
1962ChevroletImpala3.8LL6N/A
1962PontiacLaurentian4.3LL6N/A
1962PontiacParisienne4.3LL6N/A
1961ChevroletBel Air3.8LL6N/A
1961ChevroletImpala3.8LL6N/A
1961PontiacLaurentian4.3LL6N/A
1961PontiacParisienne4.3LL6N/A
1960ChevroletBel Air3.9LL6N/A
1960ChevroletBel Air3.8LL6N/A
1960ChevroletEl Camino3.8LL6N/A
1960ChevroletImpala3.8LL6N/A
1960PontiacLaurentian4.3LL6N/A
1960PontiacParisienne4.3LL6N/A
1959ChevroletBel Air3.8LL6N/A
1959ChevroletEl Camino3.8LL6N/A
1959ChevroletImpala3.8LL6N/A
1959PontiacLaurentian4.3LL6N/A
1959PontiacParisienne4.3LL6N/A
1958ChevroletBel Air3.8LL6N/A
1958ChevroletImpala3.8LL6N/A
1958PontiacLaurentian4.3LL6N/A
1957ChevroletBel Air3.8LL6N/A
1957ChevroletBel Air3.9LL6N/A
1957PontiacLaurentian4.3LL6N/A
1956ChevroletBel Air3.8LL6N/A
1956ChevroletBel Air3.9LL6N/A
1956PontiacLaurentian4.3LL6N/A
1955ChevroletBel Air3.8LL6N/A
1955ChevroletBel Air3.9LL6N/A
1955ChevroletCorvette3.8LL6N/A
1955PontiacLaurentian4.3LL6N/A
1954ChevroletBel Air3.8LL6N/A
1954ChevroletCorvette3.8LL6N/A
1953ChevroletBel Air3.9LL6N/A
1953ChevroletBel Air3.8LL6N/A
1953ChevroletBel Air3.5LL6N/A
1953ChevroletCorvette3.9LL6N/A
1953ChevroletCorvette3.8LL6N/A
1952ChevroletBel Air3.9LL6N/A
1952ChevroletBel Air3.8LL6N/A
1952ChevroletBel Air3.5LL6N/A
1951ChevroletBel Air3.9LL6N/A
1951ChevroletBel Air3.8LL6N/A
1951ChevroletBel Air3.5LL6N/A
1950ChevroletBel Air3.9LL6N/A
1950ChevroletBel Air3.8LL6N/A
1950ChevroletBel Air3.5LL6N/A
Directly replaces or cross-references 9 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Haynes — 2504025138251481131317030347400068382971634360010C24529