Radiator Caps

A faulty radiator cap can cause your car to boil-over at a lower temperature. Test or replace the coolant cap when servicing the cooling system.

  • The SWIV-EL design allows the cap to be installed and removed much easier than conventional radiator caps.
  • Meets Original Equipment specifications.
  • Made from premium materials.
  • Designed to function on open cooling systems and overflow reservoir type systems.

Lev-R-Vent™ Radiator Caps

A faulty radiator cap can cause your car to boil-over at a lower temperature. Test or replace the coolant cap when servicing the cooling system.

  • The Lev-R-Vent™ features a patented lever release to safely release pressure for quicker cooling.
  • Meets Original Equipment specifications.
  • Made from premium materials.
  • Designed to function on open cooling systems and overflow reservoir type systems.

Racing Radiator Caps

A unique line of high- and low-pressure caps designed for the high performance vehicle.

  • High pressure caps are made for use on race cars only. They should not be used on passenger cars.
  • High pressure caps are available for open and closed cooling systems.
  • High pressure caps are available in pressures ranging form 19 to 32 pounds.
  • Low pressure caps are constructed form higher quality materials and operate within closer tolerances than standard caps.
  • Low pressure caps are available in either 13 or 16 pound caps.
  • Low pressure caps also feature the Stant racing design on the cap.

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Vented Radiator Caps

There is one coolant cap that is quite different others: Stant #10231. Some people think this cap is broken when they first see it because the part that goes into the fill pipe to seal the system “wobbles.” This is a vented coolant cap. A “Vented Coolant Cap,” sometimes referred to as a “Partial Pressure” cap, may not immediately let the system realize pressure upon thermal expansion (warmup).

The cap has a small disc at the bottom of the cap that is a vacuum valve. That vacuum valve hangs down in the open position until the cap is subjected to rapid expansion of coolant or steam, which closes the valve in a sealed position. At that point, the system is pressurized and helps control overheating and enhances system efficiency. This also means the vehicle can be idling without having a pressurized cooling system and could be “venting” vapor into the overflow reservoir.

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