Happy Labor Day weekend to all! My ‘12 GT very recently has developed a knock when I start it when cold. It comes on after a few seconds of idling and remains for a minute or so then goes quiet. I always let this car warm for a couple minutes before driving. It’s got 49k miles and oil has always been kept fresh. If I understand correctly, a rod knock would not go away after the engine is fully warmed, so I’m assuming that’s not the problem. After the car has been running for a while, the...

2012 GT engine knock at cold start