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Porsche > Cayman 987C/981C (2005-2016) > Cayman S 3.4L 987C 2005-08 > Engine Rebuild Parts > Oil System Parts > Oil Coolers / Radiators / Heat Exchangers >

Engine oil cooler / heat exchanger pressure tester for Porsche 996/997 Turbo/GT2/GT3  ❭  SR064

Engine oil cooler / heat exchanger pressure tester for Porsche 996/997 Turbo/GT2/GT3 - SR064
2
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SR064
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Heat exchanger pressure tester for Porsche 996/997 Turbo/GT2/GT3

stomski

Some GT3 engines are experiencing oil-to-coolant intermixing. While there are potentially several sources of intermixing, faulty engine mounted oil-to-coolant heat exchangers are a major source. Now, with STOMSKI RACING's GT3 Heat Exchanger Tester set, you can confirm if your exchanger is faulty and needs replacing, or whether the source of the contamination is elsewhere. This set of CNC machined gauge blocks is machined from 6061 aluminum for years of service and comes complete with all gauges, seals, valves, and hardware.

Also works on the GT2 and 996/997 TT engines as well.
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3
Radiator oil cooler on engine. Porsche 986 / 987 Boxster
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Product Information
Radiator oil cooler on engine.

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Fits:
Porsche 986 Boxster 2.5L / 2.7L 1994-04
Porsche 987 Boxster 2.7L / 3.2L 2005-08
Porsche Cayman S 3.4L 987C 2005-08


Click 'Zoom in' for large parts diagram.
Diagram Ref No 18.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99610702509
99610702507
98710702501
98710702502
99610702505
99610702507
99610702509

The product you are viewing cross references to these numbers
Radiator oil cooler on engine. Porsche 986 / 987 Boxster - 8MO376726111, 31289, 99610702505, 99610702507, 99610702509
3
Radiator oil cooler on engine. Porsche 986 / 987 Boxster
99610702509/3
Product Information
Product Information
Radiator oil cooler on engine.
This engine oil cooler is a direct replacement for the original Porsche unit. It functions as a water-to-oil heat exchanger, efficiently transferring heat from the engine oil to the coolant to maintain optimal operating temperature. Built to OEM specifications, it ensures reliable cooling, consistent oil viscosity, and long-term engine protection under demanding conditions.

Fits:
Porsche 986 Boxster 2.5L / 2.7L 1994 - 2004
Porsche 987 Boxster 2.7L / 3.2L 2005 - 2008
Porsche 987C  Cayman S 3.4L  2005 - 2008

Diagram Ref No 18.

Benefits:
• Maintains optimal oil temperature to reduce wear, prevent oil breakdown and engine damage
• Direct-fit replacement ensures correct mounting, connections and flow rate
• Engineered for long life and reliability even in high-stress driving environments

Over time, engine oil coolers are exposed to high thermal cycles, pressure, and contaminants that can cause internal clogging, corrosion, or coolant-to-oil leaks. A failing cooler can lead to elevated oil temperatures, reduced lubrication, and even engine damage due to oil breakdown or cross-contamination.

When to replace:
• When oil temperature readings are abnormally high or fluctuating.
• If you notice oil in the coolant or coolant in the oil (a sign of internal leakage).
• During engine rebuilds or cooling system overhauls to ensure proper performance.
• As preventive maintenance on older engines or vehicles used in track or high-load conditions.

Replacing the oil cooler restores efficient heat transfer, maintains stable operating temperatures, and ensures long-term engine reliability.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99610702509
8MO376726111
31289
99610702505
99610702507
99610702509

The product you are viewing cross references to these numbers