Oil Coolers / Radiators / Heat Exchangers

Fits:
Porsche 997-1 GT3 3.6L 2007-09
Porsche 997-1 GT3 RS 3.6L 2007-08
Diagram ref. 28.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710604990
The product you are viewing cross references to these numbers
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MKII GT3 2010-11

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.
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT3 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13


Fits:
Porsche 997 GT3 2007-2008
Porsche 997 GT3 2010-2011
Porsche 997 GT3 RS 2007-2008
Porsche 997 GT3 RS 2011
Porsche 997 GT3 RS 4.0L 2011
Click 'Zoom in' for large parts diagram.
Diagram ref no 15
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710702592
The product you are viewing cross references to these numbers
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MKII GT3 2010-11
Engine Oil Coolers, Radiators & Heat Exchangers – Precision Cooling for Porsche Performance
The engine oil cooler and heat exchanger system plays a critical role in managing temperature within your Porsche’s engine. By transferring excess heat away from the oil and other fluids, these components ensure stable operating temperatures, consistent lubrication, and maximum engine longevity — especially under demanding performance conditions.
At Design911, we offer a full range of engine oil coolers, radiators, and heat exchangers for Porsche models old and new. Built from high-efficiency aluminium or reinforced composite materials, these components are designed to deliver superior cooling performance, durability, and perfect fitment — ensuring your Porsche performs at its best, on road or track.
Whether replacing a worn-out unit or upgrading for improved thermal efficiency, our oil cooling components provide reliable temperature control and enhanced performance.
What Do Engine Oil Coolers, Radiators & Heat Exchangers Do?
These components regulate oil and engine temperatures to maintain optimal performance and prevent overheating.
Core Functions:
- Dissipate
excess heat from the engine oil, coolant, or transmission fluid.
- Maintain
consistent oil viscosity and prevent breakdown under load.
- Protect
internal engine components from heat-related wear and failure.
- Improve overall performance efficiency during extended drives or track sessions.
Together, the oil cooler, radiator, and heat exchanger form an essential thermal management system, helping your Porsche run at peak performance while protecting vital components.
Why Do Oil Coolers & Heat Exchangers Fail?
Over time, exposure to heat cycles, vibration, and contaminants can lead to efficiency loss or complete failure.
Common Causes of Failure Include:
- Corrosion
or cracking from age or road debris impact.
- Internal
clogging caused by sludge or contaminated oil.
- Leaking
seals or fittings, reducing pressure and fluid efficiency.
- Thermal
fatigue, leading to reduced cooling capacity.
- Poor maintenance or coolant neglect, accelerating deterioration.
Symptoms of failure can include high oil temperatures, oil leaks, coolant contamination, or reduced engine performance, all of which signal the need for inspection or replacement.
Why Replace Oil Cooling Components?
Replacing a worn or leaking oil cooler, radiator, or heat exchanger is essential to preserve lubrication quality and prevent costly overheating damage. Our precision-fit, high-durability components restore proper cooling balance and reliability under all conditions.
Key Benefits:
- Restores efficient oil and fluid temperature regulation.
- Prevents overheating and engine wear.
- Improves reliability under heavy load or track use.
- Constructed from corrosion-resistant, high-performance materials.
- Direct-fit compatibility for classic and modern Porsche engines.
- Ideal for rebuilds, maintenance, and performance upgrades.
Upgrading or replacing your cooling system components helps ensure your Porsche’s engine stays efficient, durable, and ready for spirited driving.
Highlights:
- Comprehensive range of Porsche oil coolers, radiators, and heat exchangers.
- Precision-engineered for consistent temperature control.
- Constructed from lightweight, corrosion-resistant materials.
- Designed for reliability in both road and motorsport conditions.
- Improves lubrication and protects engine performance.
- Perfect for maintenance, rebuilds, or performance enhancements.