Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › timing chain replacement on a 2014 nissan altama 2.5 – qr25de engine question › timing chain replacement on a 2014 nissan altama 2.5 – qr25de engine question November 26, 2019 at 7:03 pm #895356 Richard KirshyParticipant Also strangely sounds like a cold start vacuum leak.