Sounds like the gaskets need replacing. IF in question, I get the parts to do it and then I have something to compare to. If you don't need the new parts I typically hang on to them. But, if it looks like I'll never need them, they go back to the dealer. Usually they will take them back no questions asked, if they are still in the original bag.
About the money pit thingie. There are lots of expensive wear parts in these rides. They are more expensive to maintain. But, if you stay on top of the wear items, they last a long time, ride very smoothly and perform very well.