BORGWARNER TH-25 Nos Choke Thermostat Box 2BBL 4BBL

( Brand: Borgwarner ), ( Type: Choke Thermostat ), ( Oe/oem Part Number: 7036539 / 3951638 ), ( Manufacturer Part Number: TH-25 ), ( Country/region Of Manufacture: United States ), ( Vintage Part: Yes )

Review BORGWARNER Chevrolet Nos And Choke Thermostat In Original Box fits 1965–1970

The BorgWarner T-25 Thermostat Choke Box is a crucial component in the heating and choking system of 1965 to 1970 Chevrolet vehicles equipped with 2-barrel and 4-barrel carburetors. This item is an essential part for maintaining optimal engine performance and ensuring a smooth driving experience.

The BorgWarner T-25 Choke Box houses both the thermostat and the choke system. The thermostat plays a significant role in regulating the engine's cooling system by controlling the flow of coolant. It prevents the engine from overheating during heavy loads or idling and ensures proper cooling when the vehicle is being driven at faster speeds.

The choke system, integrated within the same box, assists in starting the engine by enrichening the fuel mixture for easier combustion. By enhancing the fuel supply to the engine during starting, the choke facilitates a more reliable and efficient start-up process, particularly in colder weather conditions.

Constructed of high-quality materials, the BorgWarner T-25 Thermostat Choke Box provides durability and reliability. Its robust design ensures that it withstands the harsh conditions of a running engine, maintaining optimal temperature control and ease of starting.

Installation of the BorgWarner T-25 Choke Box is straightforward. Simply locate the thermostat choke box in the engine block, remove the old unit, and install the new one following the manufacturer's instructions. A new gasket may be required during installation to ensure a proper seal and prevent coolant leaks.

By upgrading or replacing your existing thermostat choke box with a BorgWarner T-25 unit, you can enjoy improved engine performance, easier starts, and extended engine life. This component is an essential addition to your Chevrolet's maintenance regimen and assists in preserving the drivability and overall functionality of the vehicle.

Pros and Cons of Buying a BorgWarner TH-25 1965-1970 Chevrolet 2bbl/4bbl Choke Thermostat Box

The BorgWarner TH-25 is a widely used thermostat housing assembly for 2-barrel and 4-barrel carbureted engines in Chevrolet vehicles from 1965 to 1970. This thermostat box includes the choke housing and performs the crucial function of controlling the cooling system.

1. Universal Fit: This BorgWarner TH-25 thermostat box is a direct replacement for the original factory part, making it an ideal choice for classic Chevrolet restorations and stock rebuilds.

2. Durable Design: This product features a robust design with a steel housing and brass internals to ensure long-lasting performance.

3. Improved Thermostat Functionality: Replacing the old or faulty thermostat can result in better engine performance, improved idle stability, and more consistent temperature readings.

4. Easy Installation: The interchangeable external dimensions allow for a straightforward installation process, saving you time and effort.

5. Exceptional Heat Transfer: Proper engine temperature is essential for optimal performance and longevity. By efficiently transferring heat from the engine to the cooling system, this thermostat box can contribute to overall engine health and economy.

1. Potential Leaks: Older thermostat housings can develop leaks, which might require additional sealing or gasket replacements during the installation process.

2. Compatibility with Non-Standard Cooling Systems: Some vehicle modifications or custom cooling systems may not be compatible with this stock replacement thermostat box, necessitating special attention.

3. Additional Costs: While this part may be deemed necessary for classic car enthusiasts and restoration projects, the added cost might be a deterrent for some.

4. Limited Temp Control: Although adequate for most applications, this stock replacement thermostat box may not provide the highest level of temperature control if you desire a more precise engine temperature management system.

Investing in a BorgWarner TH-25 1965-1970 Chevrolet 2bbl/4bbl Choke Thermostat Box offers several advantages, including a direct fit, durability, and improved thermostat functionality. However, potential incompatibility issues, additional labor costs associated with installation, and only adequate temperature control might pose challenges for some buyers. Careful consideration of these factors and assessment of the specific requirements of your classic Chevrolet project will guide your decision in purchasing this product.

For those seeking an authentic, reliable, and easy-to-install thermostat housing solution for their 1965-1970 Chevrolet 2-barrel or 4-barrel carbureted engines, the BorgWarner TH-25 1965-1970 Chevrolet 2bbl/4bbl Choke Thermostat Box is an excellent choice. However, if you require custom cooling applications, consider evaluating alternative thermostat housing options to ensure a perfect fit for your specific engine setup.

part # th25 price

• $34.95

specifications carbcaddie:

• for makes: Chevrolet
• for years: 1965-1970
• brand: Borgwarner
• type: Choke Thermostat
• oe/oem part number: 7036539 / 3951638
• manufacturer part number: TH-25
• country/region of manufacture: United States
• vintage part: Yes

offer carbcaddie:

• sold: 0
• started: December 24, 2024
• options: Ship-to-home
• quantity: 2
• availability: In Stock

general carbcaddie:

• condition: New other see details
• Car Truck Parts Accessories > Air Fuel Delivery > Carburetor Parts

payments carbcaddie:

• other
• wallet: Google-pay
• credit card: Mastercard

seller carbcaddie:

• rating: 98.0%
• # reviews: 192

shipping carbcaddie:

• service: USPS Ground Advantage
• cost: $9.50
• type: Fixed
• class: Standard
• carrier: USPS
• transit: 4-10 Days

returns carbcaddie:

• policy: No Returns

Borgwarner TH-25 Is Similar To:

• Borgwarner Th-18 1965-1967 Chevy Nos 4-bbl Holley H4-4160 Carburetor Choke Thermostat (64% similar) $16.45–$34.95. (December 12th, 2024)
• Borgwarner 3821564 New 1963-71 Buick Chevrolet Olds Pontiac 194-230-250 Carburetor Choke Thermostat (57% similar) $10.69–$25.00. (December 12th, 2024)
• Borgwarner Th-19 1966 Chevrolet 327 Engine Nos 4-barrel Carburetor Choke Thermostat (63.5% similar) $34.95. (December 24th, 2024)
• Borgwarner Vc-373 Borg Warner Buick Chevrolet Gmc Pontiac Carburetor Choke Pull Off (43.5% similar) $15.52–$18.00. (March 20th, 2025)
• Borgwarner Cv107 Choke Thermostat Ford Mercury 1965 1966 1967 170 200 1 Barrel (41.2% similar) $21.60. (April 14th, 2025)
• Borgwarner Th-100 Borg Warner Choke Thermostat (55.6% similar) $13.50. (June 26th, 2025)
• Borgwarner 10212a Nos Borg-warner Carburetor Tune Up Kit (28% similar) $10.00–$34.95. (July 23rd, 2025)
• Borgwarner Cv137 Choke Thermostat Cutlass 442 F85 Delta Bonneville Catalina Firebird Gto Lemans (38.5% similar) $14.00. (July 25th, 2025)
• Borgwarner 10235a Nos Borg Warner Carb Kit Ford F1 (29.2% similar) $10.00. (July 28th, 2025)
• Borgwarner Cv3-9001 1bbl Rochester Choke Thermostat Impala Camaro Chevy Nova Skylark Special Cutlass (46% similar) $6.95. (August 9th, 2025)
• Borgwarner Th-67 Borg Warner Choke Thermostat (56.1% similar) $6.95–$25.00. (October 25th, 2025)