Okay, simple question, this being my first patrol, I just want to double check this.

The brake fluid reservoir cap - Is it meant to have a concertinaed rubber seal below it? I know most/all brake set ups on other cars have it. But mine seems to be missing it, so before I run off searching for it, I want to be sure if there's meant to be one there.

So if anyone has a GQ patrol (88-89) within easy reach, could you please flick off your brake fluid cap, and see if there's a rubber thingo beneath it?

This may be a cause of my brakes screwing up when going offroad, as the brake fluid is getting aerated, and that device is meant to prevent that.

Thanks anyone and everyone for any help!

*Sorry for the title typo, wasn't thinking *