Description

The GM LS3 Style 2.35 Dia LS Thermostat with 2.73 Height 190° Jiggle Pin Thermostat is designed to regulate coolant flow within LS-series engine cooling systems. Thermostats play an essential role in maintaining proper engine temperature by controlling when coolant begins circulating through the radiator.

In LS-series engines, maintaining correct operating temperature is critical for efficient combustion, proper lubrication, and long-term engine durability. A properly functioning thermostat ensures the engine warms up quickly while preventing overheating during normal driving conditions.

The 190-degree thermostat is commonly used in factory LS engine applications because it provides balanced temperature control suitable for both daily driving and performance vehicles.

The GM LS3 Style 2.35 Dia LS Thermostat with 2.73 Height 190° Jiggle Pin Thermostat is designed to meet the requirements of LS-based cooling systems and support reliable engine operation.

Frequently Asked Questions

What does a 190° thermostat do?

A 190-degree thermostat begins opening when engine coolant reaches approximately 190°F. This allows coolant to circulate through the radiator to regulate engine temperature.

What is the jiggle pin on a thermostat?

The jiggle pin allows trapped air to escape from the cooling system during installation and operation. This helps prevent air pockets and improves coolant circulation.

Do LS engines require specific thermostats?

Yes. LS-series engines use specific thermostat sizes and designs depending on the thermostat housing configuration.

Why is engine temperature control important?

Maintaining proper engine temperature helps ensure efficient combustion, proper lubrication, and reliable engine performance.

How do I confirm this thermostat fits my engine?

Compatibility should be confirmed by checking the thermostat diameter, installed height, and engine model before installation.

Part #BPPLS3190TS
This thermostat fits LS3 style water pumps with an O-ring OD of 2.35, and overall height of 2.73. This thermostat is common to BluePrint engines with Holley pulley kits, or that come with a water pump with large hose fitting on Driver side.
Diameter: 59.69mm / 2.35 in.
Quantity: Sold individually
Description
BluePrint Thermostats
Interchangeable:
A/C Delco: 131-160
Advanced: 15158
AETM: 15158
Autozone: 52387
Autozone: 52387BP
Canadian Tire: MotoRad 523-190
Cartek: 523-190
Gates: 34198
Gates: 341985
General Motors: 8918168
Mighty: 52387
MotoRad: 523-190
NAPA: 455808
Omni: 523-190
OmniCraft: QRT49
O’Reilly: 52387
Pep Boys: 523-190
Stant: 15158
WARNING: Cancer and Reproductive Harm- www.P65Warnings.ca.gov