Should I worry about a stuck power steering cap causing pressure buildup?

[Luke18]

I was topping up my power steering fluid and noticed the reservoir cap doesn't seem to be venting properly, it was really hard to get off. Could this cause a problem with the system building up too much pressure, or is it usually not a big deal?

[Lily_J]

That cap can feel welded shut, but usually it’s just a stubborn vent and the system doesn’t suddenly pressurize on its own.

[Brian_A]

I once pried a stubborn cap loose with a rag, checked for foam or leaks, and there was nothing alarming after topping up.

[JustinA]

Are you sure the cap is supposed to vent properly, or could the real issue be somewhere else like a hose or seal?

[FrankT]

It’s easy to worry when the cap is hard to turn, but sometimes it’s just old gasket and heat stiffening—I’d watch the level and heat and not assume the worst.