Well, ran the motor for about 3 hours and no issues. Today, I was turning onto a major street and some guy on a motorcycle came zipping through two lanes of traffic (lane-splitting) and I jumped on it. Pulled through second. Guy was a total douche, riding my ass. Car ends up making this horrible screaming as I let off the gas. Pull over and it looks like head gasket? I am running a 4-corner steam line kit. You can sort of see some vapor on the right rear of the engine. Oil is clean. Engine temps never rose but the car did have a bit of a stumble afterward. Let it cool for about 10 minutes and it was fine driving home. I do see that the coolant is down about an inch through those 3 hours of driving but I chalked it up to the system bleeding. How much and when should I see the steam line dumping into the radiator? Is it possible I installed the head gaskets wrong? And wouldn't I have seen this issue in the prior 3 hours of runtime? Also, drive belt jumped 2 ribs but I'm not sure if that was during this or prior, as I didn't look at the engine after my drive last night.