Water Pump Thermostat Insert. Porsche 987.2 Boxster / 987C.2 Cayman / 997.2 / 991.1  ❭  9A110622503

This Wahler Water Pump Thermostat Insert is a Porsche 987.2 / 997.2 / 991.1 cooling system component designed to regulate coolant flow within the engine cooling circuit. Installed within the thermostat housing or water pump assembly, this thermostat insert opens and closes at predetermined temperatures to control coolant circulation between the engine and radiator.

Fits:

• Porsche Boxster 987 MKII 2.9L 2009-12
• Porsche Boxster S 987 MKII 3.4L 2009-12
• Porsche 997 MKII Carrera C2 3.6L 2009-12
• Porsche 997 MKII Carrera C4 3.6L 2009-12
• Porsche 997 MKII Carrera C2S 3.8L 2009-12
• Porsche 997 MKII Carrera C4S 3.8L 2009-12
• Porsche 997 MKII Turbo 2010-13
• Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
• Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
• Porsche Cayman 2.9L 987C MKII 2009-12
• Porsche Cayman S / R 3.4L 987C MKII 2009-12

• Regulates coolant flow through the engine cooling system
• Maintains optimal engine operating temperature
• Controls engine warm-up and cooling efficiency
• Works with the water pump to ensure effective coolant circulation
• Helps prevent overheating and overcooling
• Supports fuel efficiency and emissions performance

• Engine overheating
• Engine running too cool or warming up slowly
• Fluctuating temperature gauge readings
• Poor heater performance inside the cabin
• Coolant leaks around the thermostat housing    
• Reduced fuel economy caused by incorrect operating temperature
• Check engine light related to cooling system faults  

• Restores proper coolant flow and temperature regulation
• Prevents overheating and potential engine damage
• Improves engine efficiency and fuel economy
• Ensures reliable heater and climate control operation
• Protects cooling system components from excessive wear and stress
• Maintains long-term engine reliability and performance