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Porsche // 964 (911) (1989-1994) // 964 (911) RS 3.8L 1991-93
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- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
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- Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
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- Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
- Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
- Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp) 01/2020>>
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman 718 2.0L PDK (300 Bhp)
- Porsche Cayman S 718 2.5L PDK (350 Bhp)
- Porsche Cayman T 718 2.0L PDK (300 Bhp)
- Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
- Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
- Porsche 918 Spyder 4.6L 2014-15
Heat Exchanger & Gasket for PDK Gearbox
The OE Match PDK Gearbox Heat Exchanger and gasket is a replacement
transmission cooling component for selected Porsche Boxster, Cayman and 918
Spyder models.
Fits:
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
- Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
- Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
- Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
- Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
- Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
- Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp) 01/2020>>
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman 718 2.0L PDK (300 Bhp)
- Porsche Cayman S 718 2.5L PDK (350 Bhp)
- Porsche Cayman T 718 2.0L PDK (300 Bhp)
- Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
- Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
- Porsche 918 Spyder 4.6L 2014-15
Diagram ref no 1
Designed as an alternative to the Genuine Porsche part, it helps regulate gearbox oil temperature, protecting internal transmission components against excessive heat.
What Does It Do?
The heat exchanger transfers heat away from the PDK transmission oil, helping keep the gearbox within its intended operating temperature range.
By controlling oil temperature, it supports consistent hydraulic operation, clutch engagement and gear changes.
Why Is It Important?
PDK transmissions generate heat during driving, particularly under heavy loads or sustained performance use.
A faulty heat exchanger can contribute to:
- Excessive gearbox oil temperatures
- Reduced transmission cooling efficiency
- Irregular gear changes
- Transmission warning messages
- Premature wear of internal components
Why Does It Fail?
Common causes include:
- Internal corrosion or deterioration
- Blocked oil or coolant passages
- Damaged seals or connections
- External impact damage
- Internal leakage between fluid circuits
When Should It Be Replaced?
Replace the heat exchanger if it develops leaks, becomes blocked or can no longer regulate transmission oil temperature effectively.
It should also be inspected if gearbox overheating or unexplained fluid contamination is detected.
Checks & Installation
Inspect the oil and coolant connections, seals and surrounding pipework before installation.
Use the correct Porsche-approved transmission fluid and coolant. Follow the specified filling and bleeding procedures.
Professional installation by a Porsche transmission specialist is recommended.
Key Features
- OE Match replacement PDK heat exchanger
- Alternative to the Genuine Porsche component
- Helps regulate transmission oil temperature
- Supports reliable PDK gearbox operation
- Replacement for leaking, blocked or damaged units
Porsche Boxster, Cayman & 918 PDK Gearbox Heat Exchangers
Effective transmission cooling is essential for maintaining consistent performance and protecting the internal components of Porsche PDK gearboxes.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9G230701900
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 911 1984-1986 3.2L
- 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
O-Ring Seal 18 x 2.5mm
Sold each
On Porsche 911 models from 1984–1986, it is used in the
gearbox oil cooler assembly. On Porsche 964 and 993 models, it is used for the
heater box water drain pipe.
Fits:
- Porsche 911 1984-1986 3.2L
- 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
Diagram Ref No 6 or 19
What Does It Do?
The O-ring creates a seal between adjoining components, helping prevent unwanted leakage.
In the gearbox oil cooler application, it helps maintain an oil-tight connection. In the heater box drain assembly, it helps seal the relevant drain pipe connection.
Why Does It Fail?
Common causes include:
- Rubber hardening with age
- Exposure to heat and temperature changes
- Compression and loss of elasticity
- Cracking or splitting
- Damage during removal or installation
When Should It Be Replaced?
Replace if the O-ring is brittle, flattened, cracked or damaged.
Replacement is recommended when dismantling the gearbox oil cooler connection or heater box water drain pipe, particularly where the original seal has deteriorated.
Checks & Installation
Inspect the sealing groove and mating surfaces for dirt, corrosion or damage.
Ensure the replacement O-ring is correctly seated without twisting or pinching. Check the connection for leaks after reassembly.
Key Features
- Replacement O-ring seal
- Dimensions: 18 x 2.5mm
- Fits Porsche 911 (1984–1986) gearbox oil cooler applications
- Fits Porsche 964 / 993 heater box water drain pipe applications
- Helps maintain leak-resistant connections
- Suitable for servicing and restoration
Porsche 911 / 964 / 993 Gearbox Oil Cooler & Heater Box Seals
The Porsche 911, 964 and 993 use rubber O-ring seals in various mechanical and drainage connections to maintain correct sealing and prevent unwanted leakage.
This 18 x 2.5mm O-ring is specifically used in the 1984–1986 Porsche 911 gearbox oil cooler and the heater box water drain pipe on Porsche 964 and 993 models.
Replacing deteriorated seals helps maintain reliable operation and prevent leaks during servicing or restoration.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970714340
The product you are viewing cross references to these numbers