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  3. CHEVROLET 3998940

CHEVROLET 3998940 Carburetor Choke Thermostat Nos Gm General 70-72

fits model: Corvette, Chevelle. make: Chevrolet.

3998940 General Motors 70-72 Chevrolet Corvette Chevelle Carburetor Choke Thermostat Nos Gm

( Manufacturer Part Number: 3998940 ), ( Type: Carburetor ), ( Vintage Part: Yes )

Review CHEVROLET General Motors 70-72 Carburetor Choke Thermostat Nos Gm fits CORVETTE CHEVELLE

Introducing the 3998940 GM 70-72 Chevrolet Corvette and Chevelle Carburetor Choke Thermostat, a crucial component for ensuring optimal engine performance in your classic vehicle. This thermostat, manufactured by GM, is specifically designed for use in 1970 and 1972 Chevrolet Corvette and Chevelle models.

The 3998940 GM Carburetor Choke Thermostat is a vital part of your vehicle's cooling system. Its primary function is to control the flow of coolant to the carburetor and choke, allowing them to be heated up to the appropriate temperature for efficient engine operation. By maintaining the correct temperature, this thermostat helps ensure a smooth and consistent idling speed, improved fuel economy, and reduced emissions.

This thermostat features a robust and durable construction, designed to withstand the demands of classic car applications. It is made from high-quality materials, including a brass housing and a stainless steel valve, ensuring it can withstand the test of time. The brass housing offers excellent heat conductivity, while the stainless steel valve provides corrosion resistance and reliable sealing.

Installing this thermostat in your 1970 or 1972 Chevrolet Corvette or Chevelle is a straightforward process. It is designed to fit directly into the existing cooling system, requiring no modifications or additional components. Simply replace the old thermostat with this new one following the steps outlined in your vehicle's service manual.

When you install the 3998940 GM Carburetor Choke Thermostat in your classic Chevrolet, you can expect improved engine performance and reliability. By ensuring that your carburetor and choke receive the correct temperature, you'll experience smoother idling, better fuel economy, and fewer cold-start issues. Additionally, this thermostat's high-quality construction guarantees long-lasting performance and durability, making it an excellent investment for your classic vehicle.

In conclusion, the 3998940 GM 70-72 Chevrolet Corvette and Chevelle Carburetor Choke Thermostat is an essential component for maintaining optimal engine performance in your classic vehicle. Its durable construction, ease of installation, and proven effectiveness make it an excellent choice for enthusiasts seeking to enhance the driving experience of their 1970 or 1972 Chevrolet Corvette or Chevelle.

Buying a 70-72 Chevrolet Corvette or Chevelle carburetor choke thermostat without GM part number 3998940 involves evaluating its potential advantages and disadvantages to determine if it is a worthwhile investment.

Advantages:

1. Potential cost savings: Aftermarket or used parts can be significantly cheaper than their new OEM counterparts.

2. Availability: Finding a non-GM part may be easier, especially if the specific GM part is out of stock or discontinued.

3. Customization: Non-GM parts may offer more options for customization or performance enhancements.

Disadvantages:

1. Quality concerns: Aftermarket or used parts may not be of the same quality as OEM parts, potentially leading to issues down the line.

2. Fitment issues: Non-GM parts may not fit perfectly, requiring additional modifications or adjustments.

3. Warranty: Aftermarket or used parts typically do not come with a warranty, leaving the buyer responsible for any potential issues.

Conclusion:

Purchasing a 70-72 Chevrolet Corvette or Chevelle carburetor choke thermostat without GM part number 3998940 can save you money upfront, but it also comes with risks such as potential quality issues, fitment problems, and lack of a warranty. If you are comfortable with the risk and have the necessary skills to deal with any potential complications, then this may be a viable option. However, if you prefer the peace of mind that comes with OEM parts, it is recommended to stick with GM's offering. Ultimately, the decision depends on your budget, technical abilities, and personal preferences.

Details:

70-72 Chevrolet Corvette, Chevelle Carburetor Choke Thermostat NOS GM 3998940 Genuine. 1970-1972 Chevrolet Corvette, Camry Chevelle,Impala, Nova. Factory Original, NOS, New never used, still in original box.

part #: 3998940 prices

  • $40.00-$71.10

specifications carbcoon:

  • for models: Corvette, Chevelle
  • for makes: Chevrolet
  • mpn: 3998940
  • type: Carburetor
  • vintage part: Yes

returns carbcoon:

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

general carbcoon:

  • condition: New
  • Car Truck Parts Accessories > Air Fuel Delivery > Carburetors

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  • type: Fixed
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seller carbcoon:

  • city: Fitchburg, Massachusetts
  • # reviews: 204
  • rating: 100.0%

offer carbcoon:

  • best offers: True
  • sold: 0
  • started: February 16, 2026
  • quantity: 1
  • options: Ship-to-home
  • availability: In Stock
for models: corvette, chevelle, for makes: chevrolet, type: carburetor, vintage part: yes,
category: auto parts > car truck parts accessories > air fuel delivery > carburetors, sku: 10152932140751741,

Chevrolet 3998940 Is Similar To:

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5 offers $40.00–$71.10 USD
  • Offer #1: $40.00 price + $0.00 shipping estimate = $40.00* total. Factory Original, NOS, New (never used, still in original box). 1970-1972 Chevrolet Corvette, Camaro Chevelle, Impala, Nova.FREE SHIPPING
  • Offer #2: $71.10 price + $6.07 shipping estimate = $77.17* total. With its high-quality construction and compatibility with GM vehicles, this choke thermostat is a valuable addition to any car enthusiast's collection. Specifically designed for 1970-1972 Corvette and Chevelle vehicles, this NOS (new old stock) part ensures a reliable and authentic fit for restoring or upgrading your carburetor system.+$6.07 shipping
  • Offer #3: $59.00 price + $0.00 shipping estimate = $59.00* total. Condition: New GM Box Part Number:.FREE SHIPPING
  • Offer #4: $28.45 price + $8.95 shipping estimate = $37.40* total.+$8.95 shipping
  • Offer #5: $20.00 price + $6.50 shipping estimate = $26.50* total. new part location train shoe 1c.+$6.50 shipping

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