HomeBelts and Cooling > Thermostat and HousingGates 33957 Engine Coolant Thermostat
Part #: 33957

Gates 33957 Engine Coolant Thermostat

🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$93.55Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Reliable Cooling with Gates Heavy-Duty Thermostat 33957

The Gates Heavy-Duty Thermostat 33957 is engineered to maintain optimal engine temperature for reliable vehicle performance. Designed with durable steel, brass, and copper materials, this engine coolant thermostat ensures consistent operation under demanding conditions.

  • Heavy-duty thermostat design with bottom by-pass configuration
  • Constructed from steel, brass, and copper for durability
  • Start to open temperature at 190°F (88°C) for precise temperature control
  • Sealing flange outside diameter of 2.94 inches and valve diameter of 2.21 inches
  • Height of 3.36 inches with flange thickness of 0.06 inches

About the Gates Heavy-Duty Thermostat Product Line

The Heavy-Duty Thermostat line by Gates focuses on robust cooling components designed for demanding engine environments. This product line emphasizes durability and precise temperature regulation, making it suitable for vehicles requiring reliable thermal management. The 33957 thermostat exemplifies these qualities with its sturdy construction and bottom by-pass design, supporting efficient coolant flow and engine protection.

Detailed Product Description

The Gates 33957 thermostat features a bottom by-pass design that allows coolant to circulate even when the thermostat is closed, helping to prevent localized overheating. Its steel, brass, and copper construction provides resistance to corrosion and wear, extending the service life of the thermostat. The unit opens at 190°F (88°C), ensuring the engine reaches optimal operating temperature before coolant flow increases. With a sealing flange outside diameter of 2.94 inches and a valve diameter of 2.21 inches, this thermostat fits specific engine cooling systems requiring these dimensions.

Common Applications and Issues Addressed

  • Regulates engine temperature to prevent overheating
  • Maintains efficient coolant flow with bottom by-pass design
  • Prevents engine damage caused by thermostat failure
  • Replaces worn or malfunctioning thermostats in compatible vehicles
  • Supports consistent engine performance in heavy-duty conditions

Installation Notes and Tips

When installing the Gates Heavy-Duty Thermostat 33957, ensure the sealing flange and mating surfaces are clean and free of debris. This thermostat does not include a gasket or installation tool, so use the existing gasket or a compatible replacement. Verify the orientation of the bottom by-pass design to match the vehicle’s cooling system requirements. Proper installation helps maintain accurate temperature regulation and prevents leaks.

Quality Assurance and Warranty

Gates manufactures the 33957 thermostat to meet industry standards for durability and performance. While specific warranty details are not provided, Gates products typically come with a limited warranty against defects in materials and workmanship. For exact warranty information, consult the product documentation or Gates customer support.

BrandGates
Part Number33957
MaterialSteel, brass, copper
Sealing Flange Outside Diameter2.94
Height Between Flanges1.21
DesignBottom by-pass
TypeHeavy-duty thermostat
Height3.36
Gasket Quantity0
Jiggle Pin Weep HoleNo
Start to Open Temperature190
Start to Open Temperature88
Installation Tool IncludedNo
Flange Thickness.06
98102.21
98131.62
98410
98520
99072.01
By-Pass Flange Diameter (in)1.62
DesignBottom by-pass
Flange Thickness (in).06
Height from Flange (in)2.01
Includes Installation ToolNo
MaterialSteel, brass, copper
Number of Gaskets0
Number of Jiggle Pins/Check Valves0
Number of Seals0
Valve Diameter (in)2.21

This part fits 0 vehicles. Search below:

YearMakeModelPositionNotes

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

148891830256-C921830256C9330299339574051-90435-190

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.