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- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
High quality OE Match oil thermostat designed to regulate engine oil temperature on classic Porsche 911 S models. This precision thermal valve opens and closes based on oil temperature, helping your engine reach and maintain optimal operating temperature quickly and reliably. It is engineered as a direct fit replacement for the original Porsche thermostat, ensuring correct function and reliability.
Fits:
Porsche 911S - 1969 to 1971
Diagram ref no 12
What This Product Does:
The oil thermostat helps the engine reach and maintain its optimal oil temperature by restricting or allowing oil flow to the oil cooler:
- Cold start: Restricts oil flow to allow faster warm-up
- Normal operation: Opens progressively to route oil to the oil cooler
- Temperature regulation: Keeps oil in the correct operating range for lubrication and longevity
Why Replacement Matters:
The oil thermostat plays a crucial role in thermal management for air-cooled Porsche engines.
Over time, thermostats can stick, corrode, or fail, which can cause:
- Prolonged cold oil conditions on start-up, leading to accelerated engine wear
- Excessive oil cooling once warm, reducing engine efficiency
- Fluctuating oil temperatures and unstable operating conditions
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90110780101
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 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)
This OE Match oil pipe is a replacement engine oil line running from the oil tank to the thermostat on Porsche 911 models from 1974 to 1989. It is designed to match the original-style fitment and function, helping maintain correct oil flow through the external oil cooling system.
Fits:
Porsche 911 3.0L 1974 - 1983
Porsche 911 3.2L 1984 - 1989
Diagram Ref No 17
Previous Porsche Part Numbers: 91110773010 / 91110773011
The oil pipe carries engine oil between the oil tank and the thermostat as part of the Porsche 911 dry-sump oil system. The thermostat controls oil flow to the external oil cooler circuit when the oil reaches operating temperature, helping regulate engine oil temperature and protect the engine during driving.
Functions
• Replaces the oil pipe from oil tank to thermostat
• Supports correct engine oil circulation
• Forms part of the external oil cooling system
• Helps maintain stable engine oil temperature
• Supports dry-sump oil system operation
• Replaces corroded, leaking, crushed, blocked, or damaged original oil pipes
• OE Match replacement for Porsche 911 oil system repair and restoration.
Why Replace This Part?
External oil pipes are exposed to road dirt, heat, vibration, corrosion, oil pressure, and age-related wear. Over time, the pipe can corrode, leak, become crushed, seize at the fittings, or suffer damage during removal or repair work. A faulty oil pipe may cause oil leaks, reduced oil flow, poor cooling performance, or oil system reliability issues. Replacing the pipe helps restore secure oil transfer and dependable engine cooling.
When to Replace This Part
• Oil leaks are visible around the pipe or fittings
• The pipe is corroded, crushed, kinked, blocked, or damaged
• Oil thermostat or oil tank connections are being serviced
• External oil lines are being refreshed during restoration
• Fittings are seized or damaged during removal
• Engine oil cooling performance is reduced
• The vehicle is undergoing Porsche 911 oil system restoration
Where it fits on the car
This oil pipe fits between the oil tank and oil thermostat on Porsche 911 models. It forms part of the external engine oil circulation and cooling system.
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 1974-89
Click 'Zoom in' for large parts diagram.
Diagram Ref No 1.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93010701701
The product you are viewing cross references to these numbers