Is it possible to build your own oil catch can?

Yes! You can build your own oil catch can with some basic materials and tools. Here’s a general guide on how to do it:

Materials Needed

• Aluminum or stainless steel container (such as a small fuel filter or water bottle)
• Hose fittings (brass or steel)
• Rubber hoses (to connect to the PCV system)
• Steel wool or mesh (to help trap oil vapors)
• Epoxy or welding materials (to seal connections)
• Drain valve (optional, for easy maintenance)

Steps to Build Your Own Oil Catch Can

1. Prepare the Container – Choose a sturdy, heat-resistant container that can withstand engine conditions.
2. Drill Holes for Inlet and Outlet – Drill two holes for hose fittings: one for the inlet (from the PCV valve) and one for the outlet (to the intake manifold).
3. Install Hose Fittings – Secure the fittings using epoxy or welding to ensure airtight connections.
4. Add Internal Baffles – Place steel wool or mesh inside the container to help separate oil from air.
5. Seal the Container – Ensure all openings are properly sealed to prevent leaks.
6. Attach Hoses – Connect the hoses from the PCV valve to the catch can and from the catch can to the intake manifold.
7. Mount the Catch Can – Secure it in the engine bay using brackets or clamps.
8. Test and Maintain – Start the engine, check for leaks, and periodically drain the collected oil.

Engines operate under extreme conditions, and components—including an oil catch can—must withstand high temperatures to function properly.

Typical Engine Operating Temperatures

• Most internal combustion engines run between 87°C to 105°C (195°F to 220°F).
• Modern engines often operate at the higher end of this range, around 100°C to 105°C (212°F to 221°F).
• Inside the combustion chamber, temperatures can exceed 1,000°C (1,832°F), but cooling systems regulate the engine’s overall temperature.

Temperature Considerations for an Oil Catch Can

• The catch can should be made from heat-resistant materials like aluminum or stainless steel to withstand engine bay temperatures.
• Hoses and fittings must be rated for high-temperature exposure, typically above 120°C (248°F) to prevent degradation.
• If the catch can is placed near exhaust components, it may experience higher ambient temperatures, requiring additional insulation.