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GATES 33972  
$25.79
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$0.00
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GATES 33972 Specifications
Bypass Flange Diameter (IN)1.69
DesignBottom By-Pass
Flange Height (IN)1.04
Gasket Quantity0
Height (IN)2.19
Height Between Flanges (in)1.15
Installation Tool IncludedNo
Jiggle Pin Check Valve Quantity1
Jiggle Pin Weep HoleYes
MaterialSteel, copper
Seal Quantity1
Seal TypeO-Ring
Sealing Flange Outside Diameter (IN)2.64
Start to Open Temperature (C)87
Start to Open Temperature (F)189
189 Degree; OE Type; Includes Seal
Gates makes several types of thermostats in order to provide the same design as specified by car manufacturers:

- The reverse poppet thermostat opens against the flow of coolant from the water pump. The coolant, under water pump pressure, is used to help the reverse poppet thermostat stay closed when cool to reduce leakage. This type is engineered with a self-cleaning, self-aligning stainless steel valve

- The offset thermostat with jiggle pin valves is equipped with a special valve in the flange, which allows trapped air in the system to escape and permits the venting of air from the system when filling it with coolant

Which Thermostat Is Right For You?

Type Lifespan Flow Rate Precise Temperature Control Fail-Safe Engine Protection
Economy
Standard Replacement
★★ ★★
Performance
★★ ★★ ★★
Heavy Duty ★★★ ★★ ★★★
Premium
★★ ★★
What Temperature Thermostat Do I Need?

Thermostats have a “rated” temperature (such as 180F or 195F). This is the temperature the thermostat will start to open, releasing heated coolant from the engine into the radiator. The thermostat will fully open once the coolant gets another ten or fifteen degrees warmer.

OE TEMPERATURE

These thermostats match the OEM-specified temperature rating for the vehicle. Manufacturers recommend an OE temperature thermostat for most engines, especially for:

  • Modern engines with computers that use the coolant temperature to help control the fuel, emissions and other important systems

ALTERNATE TEMPERATURE

These thermostats have a temperature rating below (cooler than) the OEM-specified temperature rating for the vehicle. This option may make sense for use in:

  • Modified Engines
  • Performance Applications
  • Older / Classic Vehicles
Cooling System Maintenance | Tips & Tools

Without regular maintenance, cooling system components will degrade and fail prematurely, which can lead to costly engine damage. Protect your engine with simple preventative maintenance:

  • Completely drain and flush the system using Cooling System Flush prior to installation. Flushing the system is critical to prevent system contamination and failure.
  • Consider replacing the Radiator Hoses (and Hose Clamps) and Radiator Cap as part of routine preventative maintenance. System contamination can cause these parts to degrade and fail over time, which can lead to severe engine damage from overheating.
  • Refill radiator with fresh Coolant / Antifreeze according to the volume and formula specified in your Owner's Manual. Inspect levels and condition every year.
Additional Resources

Understanding Coolant Technology and Selection

Attention California Customers - Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

OEM / Interchange Numbers: 1102000515

GATES Warranty Information:
Limited Lifetime
Warranty Details