I was diagnosing my motor since I noticed my radiator coolant was completely empty after I just filled it up 30 minutes earlier. I revved the throttle body while I watched and all my coolant was sucked into my engine through my main hose linked to the engine. How simple a fix is that, I'm thinking it's a gasket problem or O' ring and I am wondering if I only have to take the valve cover off to swap out some parts. B18b1. I'm in school now trying to become a technician and any info any of you guys have would be greatly appreciated. Thanks