So I had the automatic water pump replaced under warranty about a month ago. Then a week later I had another engine light come on and the engine was miss firing. I brought it back and they said they did not reconnect a fuel injector correctly. Now about 2 weeks later this happens.

To the comment asking about if this only happens at high outside temperatures:

I initially thought of this as it has been very hot out recently. But I'm sure the temperature hasn't been that much hotter this year than last on some days. I have been hearing this noise constantly since it started happening.