Oil Thermostat
The thermostat housing is located at the top of the engine above and behind the water pump.

Fits:
Porsche 924 2.0L 11/1975- 08/1989
Porsche 924 2.0L TURBO 11/1978 - 10/1986
Click 'Zoom in' for large parts diagram.
Diagram ref no 22
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
059121113B
The product you are viewing cross references to these numbers
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982


Fits:
Porsche 924 Turbo/GT
Porsche 928 1978-95
Porsche 993 1994-97
Click pictrue for large parts diagram.
Diagram Ref No 11.
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95


Fits:
Porsche 924 1976-85
Porsche 928 1978-95
Porsche 993 1994-97
Click pictrue for large parts diagram.
Diagram Ref No 12.
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95


Fits:
Porsche 924 Turbo/GT
Porsche 928 1978-95
Porsche 993 1994-97
Click pictrue for large parts diagram.
Diagram Ref No 10.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92810717202
The product you are viewing cross references to these numbers
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Oil Thermostats – Precision Temperature Regulation for Porsche Engines
The oil thermostat plays a vital role in your Porsche’s lubrication and cooling system by controlling oil flow based on temperature. It ensures that your engine oil warms up quickly to the ideal operating temperature and maintains stability during demanding driving conditions. This optimised oil temperature improves performance, efficiency, and long-term engine protection.
At Design911, we supply a range of oil thermostats and related components designed for reliability and accuracy across both classic and modern Porsche models. Manufactured using high-quality heat-resistant alloys and durable seals, our thermostats guarantee smooth operation, consistent flow control, and a perfect fit for your Porsche’s lubrication system.
Whether you’re maintaining a 911, Cayman, or Panamera, our oil thermostats deliver the precise temperature regulation your engine demands for both everyday use and performance driving.
What Do Oil Thermostats Do?
An oil thermostat regulates when oil is diverted through the oil cooler, based on temperature readings.
Core Functions:
- Control
oil flow between the engine and the oil cooler.
- Ensure
rapid oil warm-up to reduce cold-start wear.
- Maintain
stable operating temperatures during all conditions.
- Protect
against overheating under high loads.
- Support optimal lubrication and efficiency.
By keeping oil within the correct temperature range, the thermostat helps your Porsche achieve consistent performance, better fuel economy, and extended engine life.
Why Do Oil Thermostats Fail?
Over time, continuous exposure to high temperatures, oil contamination, and mechanical wear can cause oil thermostats to degrade or malfunction.
Common Causes of Failure Include:
- Sticking
or seized valves due to sludge or varnish build-up.
- Thermal
fatigue from repeated heating and cooling cycles.
- Cracked
housings or worn seals, leading to leaks.
- Oil
contamination affecting thermal response.
- Improper temperature regulation, causing overheating or slow warm-up.
Signs of a failing thermostat include oil temperature
fluctuations, overheating, or delayed oil circulation, which can result in
reduced engine protection and performance.
Why Replace Oil Thermostat Components?
A faulty thermostat can cause erratic oil flow, engine wear, or overheating. Replacing it with a high-quality, precision-engineered unit ensures reliable temperature control, smoother oil circulation, and consistent lubrication.
Key Benefits:
- Restores accurate oil temperature regulation.
- Prevents overheating and cold-start damage.
- Improves oil flow and engine efficiency.
- Built from heat- and corrosion-resistant materials.
- Direct-fit
compatibility with a wide range of Porsche models.
- Ideal for servicing, engine rebuilds, or performance upgrades.
Replacing an ageing thermostat is an essential part of maintaining your Porsche’s lubrication system and preventing premature engine wear.
Highlights:
- Precision-engineered Porsche oil thermostats for reliable control.
- Ensures optimal oil flow and temperature regulation.
- Constructed from premium heat-resistant materials.
- Direct-fit design for 911, Cayman, Boxster, Panamera and more.
- Ideal for routine maintenance or high-performance applications.
- Maintains peak engine performance and longevity.