Performance Water Pump Kit for Lexus GS (2006-2014) 3.0L 3.5L

Heavy-Duty Mechanical Water Pump and Thermostat Kit for 2006-2014 Lexus GS (S190 / L10)

What it Does: The Performance Water Pump Kit replaces the failure-prone factory coolant pump and thermostat on the 2006-2014 Lexus GS to maintain consistent engine operating temperatures and eliminate coolant loss.

The Stock Lexus GS Cooling System Weakness

Factory water pumps on the Toyota/Lexus 3GR-FSE and 2GR-FSE engines are notorious for premature shaft seal failure, bearing wear, and weep-hole leakage typically emerging between 60,000 and 90,000 miles. Concurrently, the OEM composite thermostat housing degrades under prolonged heat cycling, resulting in micro-cracks, stuck-open thermostat valves, and erratic coolant flow that causes localized hot spots across the cylinder heads.

The Engineering Solution

This comprehensive cooling service kit features a heavy-duty, belt-driven cast aluminum mechanical water pump matched with precision-machined internal impellers to optimize fluid dynamics and prevent cavitation. Paired with a pre-assembled mechanical spring-loaded thermostat inside an OE-spec thermal housing, this setup restores critical coolant loop pressurization. High-grade elastomeric gaskets and O-rings provide an airtight seal against the timing cover and block, resisting degradation from modern ethylene-glycol mixtures.

What's Included

• 1 Mechanical Water Pump Assembly (belt-driven, pulley not included)
• 1 Mechanical Engine Coolant Thermostat with Housing
• 1 Water Pump Mounting Gasket
• Thermostat Housing Mounting Gaskets and O-rings
• Mounting Hardware (as pictured)

Technical Specifications

Compatibility

• 2006 Lexus GS300 3.0L Gas Naturally Aspirated
• 2007-2011 Lexus GS350 3.5L Gas Naturally Aspirated
• 2013-2014 Lexus GS350 3.5L Gas Naturally Aspirated
• 2007-2011 Lexus GS450h 3.5L Full Hybrid Gas
• 2013-2014 Lexus GS450h 3.5L Full Hybrid Gas

Frequently Asked Questions & Fitment Warnings

Does this fit the S190 and L10 GS?

Yes, this is a direct fit for the 2006-2014 Lexus GS equipped with the 3GR-FSE and 2GR-FSE V6 engines. It does not fit V8 models (GS430, GS460) or any non-listed powertrains.

Is coolant system bleeding mandatory after installation?

Yes, technicians must vacuum-fill or execute the full factory bleeding sequence to purge air pockets and avoid catastrophic cylinder head overheating.

The Lexus Performance Standard

Maintain the high-revving endurance and smooth power delivery of your direct-injected Lexus V6 with cooling components designed to withstand rigorous heat cycles and daily spirited driving.