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Not sure which one? Ask us to confirm fitment first →For UK customers, prices include VAT, customs and delivery unless checkout states otherwise. Outside the UK, shipping is shown at checkout and local customs and taxes remain your responsibility.
Some products are made to order, imported or custom built. If timing matters, contact us before ordering and we will confirm the expected delivery timeframe.
Send the vehicle, engine and current setup if you want us to confirm the exact application before checkout.
Welcome to the HEL Performance range of high-quality, dependable, and unrivalled oil system components. Our widely embraced, race-winning products have not only secured victories on the race track but have also been rigorously tested on the open road.
What sets us apart is simple yet significant; we handle the entire CNC machining process in-house for our complete range of oil system components. This gives us full control over the manufacturing process, leading to exceptional quality and faultless products. This commitment guarantees longevity and unwavering durability, even when used in the most demanding and challenging environments.
The HEL Performance in-line oil cooler thermostat has been designed to regulate optimal engine oil temperature when incorporating an external oil cooler into the system. This solution is perfect for applications that are limited to only using a non-thermostatic oil filter sandwich plate, due to clearance constraints when using a thermostatic version. To suit various driving styles and requirements, we offer a choice of three temperature thermostats; 82°C, 92°C and 102°C, ensuring the safe and efficient transfer of oil to your external oil cooler at the desired temperature. Thanks to its compact design, our in-line thermostat can be universally mounted to a variety of bulkheads, chassis components, and custom projects with space limitations. This innovative thermostat not only accelerates warm-up times but also eliminates the risk of overcooling, ensuring optimal operating temperature.
The thermostat adjusts gradually in response to oil temperature, opening fully once the desired temperature is reached. As the oil circulates through the external oil cooler and cools, the thermostat will close accordingly to maintain optimal operating conditions. Approximately 10% of the oil is in constant circulation through the oil cooler at all times, maintaining a consistent flow that serves two crucial purposes: to prevent the formation of air pockets and to act as a protective shield against thermal shock to the system. The surplus oil is then routed back to the engine or through the internal bypass system, promoting faster warm-up and eliminating the risk of overcooling.
Located in the base of the unit, we've integrated a handy 1/8" NPT thread that's suitable for most commonly used oil temperature and oil pressure sensors. Should you choose not to install a sensor, an NPT port plug is included as standard practice to effectively seal the thread. Mounting the thermostat in place is a simple process thanks to two elongated mounting holes, suitable for a variety of M6 hardware.
Featuring four M22 x 1.5 threaded inlet and outlet ports, our in-line thermostat can be easily adapted with M22 x 1.5 to -8 (AN08) or -10 (AN10) male adapters, ensuring compatibility with a wide range of AN hose and fittings.
If required, the thermostatic valve can be removed and replaced with an alternative temperature thermostat. To determine if it's the right fit for your application, or to see instructions on how to change the thermostat, please refer to our technical drawings which can be found in the downloadable user manual.
Please note, the HEL Performance non-thermostatic oil filter sandwich plate has been designed to be used in conjunction with this in-line oil cooler thermostat.
| 82°C / 180°F | Hot Climates & Extreme Racing Conditions |
| 92°C / 198°F - Most Common | Mixed Climates & Fast Road/Track Use |
| 102°C / 216°F | Cold Climates |
| Component Type | In-line Oil Cooler Thermostat |
| Includes Thermostatic Valve? | Yes |
| Thermostat Temperature | 82°C / 180°F, 92°C / 198°F or 102°C / 216°F |
| Length (Incl. Thermostat Cap) | 92mm / 3.62" |
| Width (Excl. Adapters) | 75mm / 2.95" |
| Thickness | 32mm / 1.26" |
| Weight (Excl. Adapters) | 289g / 0.64lbs |
| Integrated Sensor Port? | Yes |
| Sensor Port Thread | 1/8" NPT |
| Mounting Hole Size (2) | 6.5mm (H) x 11.9 (L) / 0.25" (H) x 0.46" (L) |
| Inlet/Outlet Port Thread | M22 x 1.5 (4) |
| Fluid Compatibility | Engine Oil, Transmission Oil, Driveline Fluid |
| Colour | 'HEL' Grey |
| Finish | Hard Anodised |
| Material | 6082-T6 Aluminium |
| Brand | HEL Performance |
Please see our oil system spare parts and accessories range for replacement thermostats, o-rings, and other spares.
For UK customers, prices include VAT, customs and delivery unless checkout states otherwise. For customers outside the UK, local customs and taxes remain your responsibility, and shipping is shown at checkout. If a shipping option is not available, email us and we will prepare a tailored quote.
Many of the products we sell are made to order, imported or custom built, so a lead time may apply. If you need a part urgently, contact us before ordering and we will confirm the expected delivery timeframe and process.
Check dimensions, mounting points, clearance and any wiring or hose requirements against your setup before ordering.
Send us your vehicle, year, current setup and any fitting date, event, trip or deadline before ordering. We will help check fitment, product choice and timing.
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