1. Thermostats & Parts For Sale
  2. sku: 10271079628625771
  3. MOPAR 866335

MOPAR 866335 Thermostat Housing Water Neck Straight

fits make: Chrysler, Mopar. year: 1941–1948.

866335 Mopar Thermostat Housing Water Neck 1941-1948 Chrysler Straight Eight

( Brand: Mopar ), ( Manufacturer Part Number: 866335 ), ( Type: Thermostat Housing ), ( Oe/oem Part Number: 1942 1946 1947 )

Review MOPAR Thermostat Housing Water Neck Chrysler Straight Eight fits 1941–1948

The Mopar 866335 thermostat housing water neck is a crucial component for the cooling system of Chrysler straight six engines manufactured between the years 1941 and 1948. This part is specifically designed to fit models with the engine identification code "Six, 6-cyl, 136.5 cu. in. (2257.63 cc), 110 HP, 3-speed Manual, L-head, Aluminum, Mopar PN 6019111."

The thermostat housing water neck is a sturdy, cast iron piece that securely attaches to the engine block and the thermostat housing. Its primary function is to provide a watertight seal between these two components, allowing the coolant to circulate efficiently through the engine.

The Mopar 866335 thermostat housing water neck features a threaded end that connects to the thermostat housing using a gasket, ensuring a leak-free connection. The neck also includes a locating boss that helps properly position the thermostat housing during installation.

This part is manufactured to meet the high-quality standards of Mopar, ensuring a precise fit and reliable performance. It undergoes rigorous testing to ensure it meets or exceeds the OEM specifications.

When replacing this part, it's essential to use a new gasket and apply a sealant to the threads to ensure a proper seal. Proper installation is crucial to ensure the cooling system functions correctly and maintains optimal engine temperature.

In summary, the Mopar 866335 thermostat housing water neck is an essential cooling system component for Chrysler straight six engines from 1941 to 1948. Its robust design and reliable performance make it a valuable addition to any restoration project or daily driver.

Mopar 866335 Thermostat Housing Water Neck for 1941-1948 Chrysler Straight Six Engines: A Detailed Analysis

Introduction:

The Mopar 866335 thermostat housing water neck is a crucial component for the cooling system of 1941-1948 Chrysler Straight Six engines. This part is essential for maintaining optimal engine temperature and preventing potential engine damage due to overheating. In this analysis, we will discuss the advantages and disadvantages of purchasing this thermostat housing water neck.

Advantages of Mopar 866335 Thermostat Housing Water Neck:

1. OEM Quality: The Mopar 866335 thermostat housing water neck is an original equipment manufacturer (OEM) part, ensuring it is a perfect fit for your vehicle and meets Chrysler's high-quality standards.

2. Durability: This thermostat housing water neck is designed to withstand the rigors of regular use in a classic car engine. It is made from high-quality materials, ensuring long-lasting performance.

3. Improved Cooling System: A new thermostat housing water neck can lead to improved cooling system performance, as it seals the connection between the engine and the cooling system more effectively than a worn-out part.

4. Safety: A faulty or worn-out thermostat housing water neck can lead to coolant leaks, potentially causing engine damage or even a fire. Replacing this part with a new one can help prevent such issues.

Disadvantages of Mopar 866335 Thermostat Housing Water Neck:

1. Cost: The Mopar 866335 thermostat housing water neck can be more expensive than aftermarket alternatives. However, considering the OEM quality and potential safety benefits, many enthusiasts may find the investment worthwhile.

2. Availability: Depending on your location and the availability of parts from local suppliers, you may need to order this part online, which could take some time to arrive.

3. Labor Costs: Installing this thermostat housing water neck yourself can be a challenging task, especially if you are not familiar with the engine's cooling system. In that case, you may need to pay for labor costs to have a professional mechanic install the part for you.

Conclusion:

The Mopar 866335 thermostat housing water neck is an essential component for maintaining the cooling system and overall performance of your 1941-1948 Chrysler Straight Six engine. While it may come with a higher cost compared to aftermarket alternatives, its OEM quality, durability, and potential safety benefits make it a worthwhile investment for classic car enthusiasts.

Recommendation:

If you own a 1941-1948 Chrysler Straight Six engine and are experiencing cooling system issues or have a worn-out thermostat housing water neck, we recommend investing in the Mopar 866335 thermostat housing water neck to ensure optimal engine performance and prevent potential safety concerns.

Details:

Please verify part number and pictures match your application. See pics for condition. Used OEM Mopar thermostat housing water neck, casting number 866335. Neck has some heavy pitting.

part #: 866335 price

  • $40.50

specifications theostapa:

  • for makes: Chrysler, Mopar
  • for years: 1941-1948
  • brand: Mopar
  • mpn: 866335
  • type: Thermostat Housing
  • oe/oem part number: 1942 1946 1947

payments theostapa:

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

seller theostapa:

  • # reviews: 31703
  • city: Sheboygan Falls, Wisconsin
  • rating: 100.0%

shipping theostapa:

  • carrier: USPS
  • cost: $0.00
  • service: USPS Ground Advantage
  • type: Calculated
  • transit: 3-7 Days
  • class: Standard

offer theostapa:

  • quantity: 1
  • sold: 0
  • started: October 27, 2025
  • options: Ship-to-home
  • availability: In Stock
  • best offers: True

returns theostapa:

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

general theostapa:

  • condition: Used
  • Car Truck Parts Accessories > Engine Cooling Components > Thermostats Housings
for makes: chrysler, mopar, for years: 1941-1948, type: thermostat housing, oe/oem part number: 1942 1946 1947,
category: auto parts > car truck parts accessories > engine cooling components > thermostats housings, sku: 10271079628625771,
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1 offer $40.50 USD
  • Used. Offer #1 priced at $40.50 + $0.00 shipping estimate = $40.50* total. See pics for condition. Used OEM Mopar thermostat housing water neck, casting number .FREE SHIPPING

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