The engine coolant thermostat is a small but
essential component that regulates coolant flow through your engine. When the
engine is cold, the thermostat remains closed to restrict coolant circulation,
allowing the engine to reach its optimal operating temperature more quickly.
Once the desired temperature is achieved, it opens to maintain consistent
cooling and prevent overheating. Products ref no. 9A712111000 which supersedes from old part numbers 9A110622602 & 9A110622603
Installation Tip: Always position the thermostat’s jiggle
pin (bleed valve) at the 12 o’clock position when possible, to ensure
proper air bleeding.
Thermostat Temperature Ratings
Many vehicles offer thermostats with different temperature
ratings. These ratings indicate the temperature at which the thermostat begins
to open.
In
colder
climates, a higher temperature thermostat helps the engine maintain
warmth.
In
hot
desert climates, a lower temperature thermostat may be preferred to
enhance cooling efficiency.
Fits:Porsche 981 Boxster 2012-16
Porsche 718 (982) Boxster 2017>>
Porsche 981C Cayman 2013-16
Porsche 718C (982C) Cayman 2017>>
Porsche 991.1 2012-16
Porsche 991.2 2017>>
Common Thermostat Failures
Thermostat
Stuck Open (Most Common)
The
thermostat fails to close, causing continuous coolant flow even when the
engine is cold.
This
prevents the engine from reaching normal operating temperature, often
leading to poor fuel economy, rich air-fuel mixtures, and potential
catalytic converter damage.
Thermostat
Stuck Closed
The
thermostat fails to open, restricting coolant flow through the engine.
This
results in overheating and may cause severe or even catastrophic engine
damage.
Signs of a Failing Engine Coolant Thermostat
Engine
overheating
Engine
not reaching optimal operating temperature
Radiator
fan not engaging properly
Click 'Zoom in' for large parts diagram.
Diagram ref no 20
Related reference numbersRelated, superseded, cross reference or alternative numbers for comparison.
9A712111000 40400009
9A110622603
9A110622602
The product you are viewing cross references to these numbers