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Porsche // Macan (95B) MK1 (2014-2018) // 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
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Diagram ref. 7.
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Click 'Zoom in' for large parts diagram.
Diagram ref no 2
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The thermostat housing is located at the top of the engine above and behind the water pump.
Fits:
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Previous numbers:
94810603400, 94810603401, 94810603402, 94810603403
Click 'Zoom in' for large parts diagram.
Diagram ref no 6
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Thermostat Insert with Aluminium Housing and O-Rings
Restore correct engine temperature control with this OE
Match Thermostat Insert. The thermostat regulates coolant flow between the engine and
radiator. It helps the engine reach operating temperature quickly when cold and
then maintains the correct temperature by controlling coolant circulation
through the radiator.
Fits:
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- Porsche 970.2 Panamera Turbo S V8 4.8L 2014-16
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- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
Diagram ref no 6
What Does the Thermostat Insert Do?
When the engine is cold, the thermostat remains closed to restrict coolant flow through the radiator, helping the engine warm up efficiently.
As coolant temperature rises, the thermostat opens and allows coolant to circulate through the radiator where excess heat can be removed.
A correctly operating thermostat helps:
- Maintain the correct engine temperature
- Allow faster engine warm-up
- Regulate coolant flow through the radiator
- Prevent excessive engine temperatures
- Support efficient engine operation
- Maintain consistent cooling system performance
Why Do Thermostats Fail?
Thermostats operate through thousands of heating and cooling cycles and can gradually deteriorate with age.
Common causes include:
- Internal mechanical wear
- Thermostat valve sticking
- Weakening of the temperature-sensitive element
- Coolant contamination or deposits
- Corrosion within the cooling system
- Overheating General age-related deterioration
A thermostat can fail either open or closed. A thermostat stuck open can cause the engine to run too cool, while one stuck closed can restrict coolant circulation and cause overheating.
When Should the Thermostat Be Replaced?
Replacement should be considered if:
- The engine takes unusually long to warm up
- Engine temperature remains below normal
- Engine temperature becomes too high
- Temperature readings fluctuate unexpectedly
- Cabin heater performance is poor
- Diagnostic testing indicates incorrect coolant temperature
- The thermostat is sticking or no longer opening correctly
- Cooling system repairs make replacement advisable
Thermostat replacement is also commonly considered during major cooling system maintenance, particularly on higher-mileage vehicles.
Important Cooling System Checks
Overheating or incorrect engine temperature is not always caused by the thermostat.
The coolant level, water pump, radiator, cooling fans, hoses and cooling system should also be inspected when diagnosing temperature problems.
Any coolant leaks should be repaired and the cooling system correctly filled and bled after thermostat replacement.
Porsche Cayenne, Macan & Panamera Thermostats
The thermostat is a key component of the Porsche engine cooling system, controlling coolant circulation according to engine temperature.
As Cayenne, Macan and Panamera models age, thermostats can become slow to operate or stick partially open or closed. Typical symptoms include slow engine warm-up, low operating temperature, fluctuating temperature readings or overheating.
When diagnosing Porsche cooling system problems, the thermostat should be checked alongside the water pump, radiator, coolant level and other cooling system components.
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- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
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- Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18
Fits:
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Porsche 958 Cayenne / S / GTS / Turbo 2011-18
Porsche 970 Panamera / S / GTS / Turbo 2010-16
Porsche 95B Macan S / Turbo 2014-18
Click 'Zoom in' for large parts diagram.
Diagram ref no 2
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