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Oil Thermostat
By OE Match
- 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)
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
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Related, superseded, cross reference or alternative numbers for comparison.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
This kit is comprised of the following items:
- 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Related, superseded, cross reference or alternative numbers for comparison.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 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Related, superseded, cross reference or alternative numbers for comparison.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
- 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Related, superseded, cross reference or alternative numbers for comparison.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 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Related, superseded, cross reference or alternative numbers for comparison.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 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 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)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 914 (1970-1976)
Fits:
Porsche 911 / 912 1969-76
Porsche 911 SC SPM 1978-83
Porsche 911 Turbo 3.0L 1975-77
Porsche 914
Diagram ref no 28
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90164163200
The product you are viewing cross references to these numbers
- 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)
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- 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
OE Match oil thermostat O-ring on engine case, 39.2 x 3mm, for Porsche 911, 914-6, 964, and 993 models. This replacement sealing O-ring helps prevent oil leaks at the engine-mounted thermostat area and supports correct engine oil system sealing.
Fits:
Porsche 911 - 1970 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1997
Porsche 914-6 - 1970 to 1976
Diagram ref no 34
The O-ring seals the joint between the oil thermostat and engine case. A correctly fitted seal helps prevent oil seepage, maintain oil system integrity, and keep the engine area clean and leak-free.
Functions
• Replaces the oil thermostat O-ring
• Seals the thermostat connection on the engine case
• Helps prevent engine oil leaks
• Supports correct oil system sealing
• Suitable for oil thermostat, engine case, or oil leak repair
• Replaces hardened, flattened, cracked, swollen, or damaged O-rings
• OE Match replacement for Porsche engine oil system service.
Why Replace This Part?
Oil thermostat O-rings can harden, flatten, crack, swell, or lose sealing ability due to heat, age, oil exposure, and pressure cycles. A worn or damaged O-ring may allow oil seepage around the thermostat area, causing oil residue, low oil level concerns, engine bay contamination, or failed inspection. Replacement is recommended whenever the thermostat is removed or oil leakage is present.
When to Replace This Part
• Oil is leaking around the engine-mounted thermostat area
• The oil thermostat has been removed or serviced
• The O-ring is hard, flattened, cracked, swollen, or damaged
• Engine case sealing work is being carried out
• Oil seepage or oil residue is visible around the thermostat connection
• Preventative replacement is required during engine service
Where it fits on the car
This O-ring fits at the oil thermostat connection on the engine case. It forms part of the engine oil sealing system on Porsche 911, 914, 964, and 993 models.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970731440
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
- 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
-
crankcase 911 1970-73 101-05
-
engine lubrication auxiliary units for TYP 901/10 911S UPTO 1971 104-05
-
engine lubrication 911 T-E/E/S and 911 T-V 1972 104-15
-
engine lubrication auxiliary units for TYP 911/53/63 - 911 T-E/E/S and 911 T-V 1972 104-20
-
engine lubrication auxiliary units for TYP 911/53/63/83/88 - 911 1973 ONWARDS 104-30
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crankcase right 911 1978-83 101-10
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engine lubrication radiator coil 911 1978-83 104-05
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crankcase right 911 1987-89 101-10
-
engine lubrication oil cooler 911 1987-89 104-05
-
converter and converter housing TYP 905/21 sportomatic for 911 T/E UPTO 1971 and 911 T-V 1972 ONWARDS 306-00
-
Converter and converter housing TYP 925 sportomatic for 911 T-E/E/S and CARRERA 2.7 1972 ONWARDS 306-05
-
Crankcase right 911 1984-86 101-10
-
engine lubrication oil cooler 911 1984-86 104-05
-
Crankcase right 911 1974-77 101-10
-
engine lubrication, radiator coil 911 1974-77 104-05
-
Converter converter housing 911 1974-77 SPM 307-05
-
Crankcase 911 1965-69 101-05
-
engine lubrication auxiliary units for TYP 901/10. for 911S 1969 onwards 104-05
-
converter and converter housing sportomatic 911 1965-69 306-00
-
crankcase right 911 Turbo 1975-77 101-10
-
engine lubrication, radiator coil 911 TURBO 1975-77 104-05
OEMatch Oil Thermostat — Fit, Function, Confidence
The oil thermostat controls oil flow to the cooler based on temperature, helping the engine reach operating temperature quickly and maintaining stable oil temperatures under load. Many owners search for genuine or OEM oil thermostat; these are direct-fit alternatives designed to match the original form, fit and function. OEMatch supplies components for Porsche models.
Available Types- Replacement thermostat assemblies
- Thermostat housings and seals
- Temperature sensors and gaskets
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original oil thermostat.
OE (Original Equipment) refers to parts matching original specifications for the oil thermostat and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM oil thermostat engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
The oil thermostat itself is a temperature-sensitive valve that diverts oil through the cooler when required; its operation helps reduce cold-start wear and prevents overheating during sustained high-load running. Typical construction uses heat-resistant alloys and durable seals chosen to tolerate long-term exposure to hot oil.
- Faster oil warm-up and reduced cold-start wear
- Improved temperature control during heavy use
- Consistent oil flow to protect bearings and seals
- Thermal fatigue from repeated heating and cooling cycles
- Oil contamination or sludge causing sticking or sluggish response
- Degraded seals or cracked housings leading to leaks and poor thermal response
A failing thermostat can cause erratic oil temperatures, increased engine wear and a higher risk of overheating. For Porsche owners, maintaining correct oil temperature is important to preserve engine clearances and the intended performance characteristics. Replacing ageing thermostatic components restores reliable temperature control and supports consistent lubrication across normal and demanding driving conditions.
Advantages- Coverage aimed at classic and modern Porsche models
- Materials selected for heat and corrosion resistance
- Suitable for routine servicing and engine rebuilds
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Filler Neck Parts
-
Oil Tank & Parts
-
Oil Level Senders
-
Oil Pressure Senders / Switches
-
Oil Pressure Relief Valve
-
Oil Pipes & Hoses
-
Breather Pipes
-
Camshaft Lines
-
Oil Separators & Vent lines
-
Oil Pumps & Gaskets
-
Oil Coolers / Radiators / Heat Exchangers
-
Oil Sump
-
Oil Filter Housing
-
Oil Temperature Sensor
-
Oil Level Dipstick
