I have a 1996 Volvo 850 Turbo sitting at around 110k miles and last night I started it to go to work and it took a few seconds to start, so i got out of my car to check my oil and when i got out i heard a slight squeaking noise. i took out the dip stick and it was covered in a crème colored mix of oil and coolant. I immediately turned the car off and opened the engine cap and saw a rubber O ring sitting on top of the camshaft. The car didn’t overheat or show signs of a coolant leak when i had driven it last a few days prior, and the rubber O ring was not broken in anyway after having been loose on the cam while the car was running momentarily. So i’m assuming the leak happened when I wasn’t driving maybe from the cold weather changing drastically? And when i started it, it got all mixed up in my engine. I love this car so incredibly much and I don’t want to have to get rid of it. Is there a chance it’s fixable? And what would the cost be? I’m assuming over or around $2k USD