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Oil Thermostat
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Fits:
Porsche 911 3.2 Carrera - 1984 to 1989
Kit Includes
Oil pipe - Engine to oil thermostat
Oil pipe - Oil thermostat to oil tank
Diagram Ref No 9 and 10
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
OILPIPEKIT03
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50

Fits:
Porsche 911 1965-71
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
0210002
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
2 per car. Price is for each.
Fits:
Porsche 911 911S / CARRERA 2.7 1973-74
Diagram ref no 17
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110736101
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
2 per car. Price is for each.
Fits:
Porsche 911 911S / CARRERA 2.7 1973-74
Diagram ref no 17
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110736101
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
Fits:
Porsche 911 2.7L 1974-77
Diagram ref no 16
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110772910
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
Fits:
Porsche 911 2.7L 1974-77
Diagram ref no 16
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110772910
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera

Fits:
Porsche 911 2.7L 1975-77
Porsche 911 3.0L 1978-83
Click 'Zoom in' for large parts diagram.
Diagram Ref No 9.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110774312
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
Fits:
Porsche 911 3.0 03/74-07/83
Porsche 911 Turbo 3.0 01/75-07/77
Diagram Ref No 9
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110774312
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
Fits:
Porsche 911 TURBO (930) 3.3L 1978-89
Diagram ref no 9
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93010774316
The product you are viewing cross references to these numbers
- Porsche 911 1978-1989 3.3L Turbo (930)
Fits:
Porsche 911 TURBO (930) 3.3L 1978-89
Diagram Ref No 9
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93010774316
The product you are viewing cross references to these numbers
- Porsche 911 1978-1989 3.3L Turbo (930)
Fits:
Porsche 911 3.2L 1984-89
Diagram Ref No 9
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93010774315
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Oil Pipe – Engine to Oil Thermostat
The Porsche 911 Oil Pipe connects the engine oil
system to the oil thermostat, allowing engine oil to flow correctly through the
external oil cooling circuit. This pipe is an important part of the Porsche 911
dry-sump lubrication system, helping route hot engine oil towards the
thermostat before it is directed to the front oil cooler when required.
Fits:
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Diagram Ref No 9
On air-cooled Porsche 911 models, correct oil circulation is essential for engine temperature control, lubrication, and long-term reliability. A damaged, corroded, restricted, or leaking oil pipe can reduce oil flow efficiency, cause oil loss, and compromise the cooling performance of the engine oil system.
This replacement oil pipe is ideal for Porsche 911 maintenance, restoration, engine rebuilds, and oil cooling system repairs.
What Does This Oil Pipe Do?
The oil pipe transfers oil from the engine towards the oil thermostat. The thermostat regulates whether oil is sent through the external oil cooler circuit, depending on operating temperature. When the engine oil reaches the correct temperature, the thermostat opens and allows oil to circulate through the cooler system, helping maintain stable engine temperatures.
A properly functioning oil pipe helps:
- Maintain correct oil flow from the engine to the thermostat
- Support efficient oil temperature regulation
- Protect the engine from overheating
- Preserve lubrication performance
- Keep the Porsche 911 dry-sump oil system operating as intended
Why Does This Oil Pipe Fail?
Porsche 911 oil pipes are exposed to heat, road debris, moisture, vibration, and oil system pressure. Over time, these conditions can cause deterioration, especially on older air-cooled models.
Common reasons for failure include:
- Corrosion on exposed metal pipe sections
- Damage from road debris or impact
- Cracked or weakened joints
- Oil leaks from ageing connections
- Seized or damaged fittings during removal
- Internal restriction caused by debris or old oil deposits
- Previous poor repairs or incorrect installation
Because these oil pipes are part of a high-temperature, high-use lubrication system, even minor leaks or restrictions should be treated seriously.
When Should You Replace It?
Replace the oil pipe if you notice visible corrosion, oil leaks, damaged pipework, crushed sections, poor fitting condition, or oil residue around the thermostat or engine connections.
Replacement is also recommended during:
- Engine removal or rebuild work
- Oil thermostat replacement
- External oil cooler system refurbishment
- Full restoration projects
- Preventative maintenance on ageing oil lines
- Repair of leaking or seized oil pipe fittings
Replacing the pipe before complete failure helps prevent oil loss, poor cooling performance, and potential engine damage.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93010774315
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Fits:
Porsche 911 3.0L 1974-83
Porsche 911 3.2L 1984-89
OE Part numbers
- 91110773010
- 91110773011
Click 'Zoom in' for large parts diagram.
Diagram Ref No 17.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110773013
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Fits:
Porsche 911 3.0L 1974-83
Porsche 911 3.2L 1984-89
OE Part numbers
- 91110773010
- 91110773011
Diagram Ref No 17
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110773013
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Fits:
Porsche 911S Carrera 2.7L 1973-74
Diagram ref no 26
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110772420
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
Fits:
Porsche 911S Carrera 2.7L 1973-74
Diagram ref no 26
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110772420
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
-
engine lubrication auxiliary units for TYP 911/53/63/83/88 - 911 1973 ONWARDS 104-30
-
engine lubrication radiator coil 911 1978-83 104-05
-
engine lubrication oil cooler 911 1987-89 104-05
-
engine lubrication oil cooler 911 1984-86 104-05
-
engine lubrication, radiator coil 911 1974-77 104-05
-
engine lubrication, radiator coil 911 TURBO 1975-77 104-05
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.