FernReds Report post Posted March 5, 2022 I have a mystery oil leak in my daughter's Escape. I replaced the valve cover seals, the air plenum seals and the PCV valve which showed wear and were leaking oil. It was fine for a while but now it's losing about a quart every 100 miles or so. The only place I see oil is between the valve cover and the thermostat housing. Please see the pictures. Anyone else dealt with this before? Thanks! Share this post Link to post Share on other sites
