Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › Engine "breathing" through oil filler hole when open. › Reply To: Engine "breathing" through oil filler hole when open. October 26, 2020 at 9:30 am #986828 David ErhahonParticipant Would have done that (autozone) if I were in the US. Thanks for the advice though. Well received. I will try to purchase one locally.