Posted February 4, 2007 Hi! I hope someone can help me. I have a 2001 Honda Rancher that is leaking oil at the crankcase vent hose in the air box. Does anyone have any suggestions. I read in other posts that it could be piston rings but there does not seem to be any power loss or excess smoke. If I do a compression check what should it read? Thanx for your help..... Share this post Link to post Share on other sites Like what you are reading? Please help us by sharing this content.