BORG WARNER TH135 Quadrajet Carburetor Choke Thermostat Gm B/w 4-BBL

( Brand: Borg Warner ), ( Type: Choke ), ( Manufacturer Part Number: TH135 ), ( Vintage Part: Yes ), ( Universal Fitment: No ), ( Country Of Origin: United States )

Review BORG WARNER Quadrajet B/w Carburetor Choke Thermostat Gm Rochester fits 1966–1979

The Borg Warner Twin-Bore Quadrajet Carburetor Choke Thermostat is a vital component for the Rochester 4-barrel fuel delivery system in certain General Motors vehicles manufactured between 1966 and 1979. This carburetor is an essential part of the engine's fuel system, ensuring optimal performance under various driving conditions.

The Quadrajet Carburetor is a complex piece of engineering, featuring a unique design that utilizes a twin-bore throttle body. Each bore serves a specific function: the primary bore handles the idle circuit, while the secondary bore manages the fuel delivery for cruising and high-speed operation. This design guarantees smooth and efficient fuel flow to the engine, yielding superior power and fuel economy.

The Choke Thermostat is an integral part of the Quadrajet Carburetor, serving the dual purpose of controlling both the choke and the thermostat functions. The choke function ensures the engine starts easily during cold weather by enriching the fuel-air mixture. The thermostat function maintains the engine temperature within an optimal range, ensuring proper engine warm-up and longevity.

The Borg Warner Quadrajet Carburetor Choke Thermostat is a well-engineered component, designed with a rugged construction to withstand the rigors of daily driving. It features a robust metal housing, with precise internal components that are engineered to provide long-lasting, reliable performance.

The carburetor choke thermostat also boasts an easy-to-use design. It includes a vacuum-operated choke mechanism, which automatically engages when the engine is started during cold weather. The thermostat function is controlled by the engine coolant temperature, ensuring the engine reaches the optimal operating temperature for efficient and consistent performance.

Installing the Borg Warner Twin-Bore Quadrajet Carburetor Choke Thermostat involves removing the old component and replacing it with the new one. This process typically requires some mechanical knowledge and basic hand tools. However, for those less experienced in automotive repairs, it may be recommended to consult a professional mechanic to ensure the job is done correctly and safely.

In conclusion, the Borg Warner Twin-Bore Quadrajet Carburetor Choke Thermostat is a crucial component for the Rochester 4-barrel fuel delivery system in specific General Motors vehicles produced between 1966 and 1979. Its unique design allows for efficient fuel flow and optimal engine temperature control, ensuring the engine performs at its best under various driving conditions. With its rugged construction and easy-to-use design, this carburetor choke thermostat is a valuable investment for any enthusiast or mechanic working on these classic vehicles.

The Borg Warner Twin Jet Quadrajet carburetor, model TH135, was used in General Motors (GM) Rochester 4-barrel applications from 1966 to 1979. This carburetor features a choke and thermostat, which can be beneficial for certain applications. Here are the pros and cons of buying a Borg Warner TH135 Quadrajet carburetor with a choke and thermostat:

1. Improved Idle Stability: A choke system can help improve idle stability, especially in cold weather conditions.

2. Fuel Efficiency: The Quadrajet design offers better fuel atomization and more efficient combustion, leading to better fuel economy.

3. Smooth Power Delivery: The Quadrajet design delivers smoother power delivery compared to single-barrel carburetors.

4. Thermostat Control: The integrated thermostat can help maintain optimal engine temperature, leading to better performance and longer engine life.

5. Wide Compatibility: The TH135 Quadrajet carburetor was used in a wide range of GM applications, making it a versatile choice.

1. Complexity: The Quadrajet design is more complex than a single-barrel carburetor, which can make it more difficult to tune and maintain.

2. Cost: The Quadrajet carburetor is generally more expensive than a single-barrel carburetor due to its complexity and additional components.

3. Fuel Economy Tradeoff: While the Quadrajet design can lead to better fuel economy, it can also result in slightly reduced power output compared to a larger single-barrel carburetor.

4. Vulnerability to Fuel Contamination: The Quadrajet design is more susceptible to fuel contamination due to its complex fuel delivery system.

The Borg Warner TH135 Quadrajet carburetor with a choke and thermostat offers several benefits, including improved idle stability, fuel efficiency, smooth power delivery, and thermostat control. However, it also comes with some drawbacks, such as complexity, cost, and potential fuel contamination issues. Ultimately, the decision to purchase a TH135 Quadrajet carburetor depends on your specific application requirements and preferences. If you value the benefits of improved idle stability, fuel efficiency, and smooth power delivery, and are willing to invest in the additional complexity and cost, then the TH135 Quadrajet carburetor may be the right choice for you. If you prefer a simpler, more cost-effective solution, then a single-barrel carburetor may be a better option.

part # th135 prices

• $9.99-$30.00

specifications carbcaddie:

• for makes: Rochester
• for years: 1966-1979
• brand: Borg Warner
• type: Choke
• manufacturer part number: TH135
• vintage part: Yes
• universal fitment: No
• country of origin: United States

returns carbcaddie:

• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

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• options: Ship-to-home
• sold: 0
• quantity: 1
• availability: In Stock
• started: March 12, 2026

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• rating: 100.0%
• # reviews: 5517

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• cost: $4.95
• service: Economy
• class: Economy
• type: Fixed

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general carbcaddie:

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

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