Plavan's 818R Build Thread

[Hindsight]

leaky head gasket (logging showed it going lean coming to a stop then smoothing out)

Mechie, how did a leaky head gasket cause this and how would coming to a stop change it? I ask because I'm trying to solve a lean condition myself.

[Mechie3]

Mechie, how did a leaky head gasket cause this and how would coming to a stop change it? I ask because I'm trying to solve a lean condition myself.

In my case (not a new motor) there was a small air leak that was mostly noticeable at lower rpms/air flow. At higher rpms/airflow the amount of the leak was small relative to the rest of the airflow. I upped the idle rpm to get by for a while but eventually my coolant was all brown so I took it apart and put new gaskets on and it was fine.