Gates 34003 Engine Coolant Thermostat

OE Type Thermostat for Lexus V8 Cooling Control

The Gates OE Type Thermostat 34003 is built for precise engine temperature regulation and an OEM-equivalent fit. It is a direct replacement engine coolant thermostat for select Lexus applications, including 2013-2014 Lexus LS600h, 2013 Lexus IS F, 2013 Lexus LS460, and 2013 Lexus LX570.

Gates OE Type Thermostat products focus on factory-style operation and leak-free sealing, making this thermostat a practical choice for Lexus LS600h thermostat replacement and other OE temperature service needs.

Key Features

• OE Type Thermostat with OE Performance comparison rating
• Reverse poppet design for controlled coolant flow
• Start-to-open temperature: 180°F / 82°C
• Jiggle pin weep hole included for air bleeding
• Stainless steel, copper, and brass/copper construction details listed by application
• Sealing flange outside diameter: 2.04-2.05 in.
• Height specifications listed at 1.5-1.7 in., with flange measurements provided

Detailed Description

Gates 34003 is an engine coolant thermostat engineered to match OE-style temperature control and fitment requirements. The reverse poppet design helps regulate coolant circulation at the specified 180°F opening point, supporting stable operating temperature in Lexus cooling systems. This thermostat is listed for 2013-2014 Lexus LS600h, 2013 Lexus IS F, 2013 Lexus LS460, and 2013 Lexus LX570, making it a targeted solution for drivers searching for a 180 degree Lexus thermostat or an OE type thermostat for Lexus V8 applications. This part cross-references Four Seasons 34003 for the same application.

Common Issues This Part May Address

• Engine running hotter than normal due to a thermostat that no longer opens at the correct temperature
• Slow warm-up or unstable coolant temperature from worn thermostat internals
• Coolant flow irregularities caused by a sticking thermostat valve
• Air trapped in the cooling system during service, helped by the jiggle pin weep hole
• Fitment concerns when replacing an OE-style thermostat in select Lexus cooling systems

Installation Notes and Tips

Verify the thermostat housing and sealing surfaces are clean before installation. Match the replacement to the specified 180°F opening temperature and confirm the OE-style dimensions against the original part. Because no installation tool is included, use the correct service tools for your Lexus LS600h, LS460, IS F, or LX570 cooling system and follow the vehicle service procedure for coolant refill and air bleeding.

Quality Assurance

Gates OE Type Thermostats are engineered for precise temperature control and OEM-equivalent fit. The 34003 is built to support leak-free sealing and consistent thermostat operation in the listed Lexus applications.