Nissan Murano engine smoking issue after valve sealant application on Nissan Murano

Some Nissan Murano owners report experiencing engine smoking issues after applying valve sealant, with blue smoke often indicating that oil is burning due to faulty valve stem seals. Additionally, some owners notice white smoke billowing from the exhaust upon startup, which may suggest condensation in the exhaust system if it occurs only during cold starts and is not a cause for concern. However, if this white smoke persists after the engine has warmed up, it could indicate a more serious problem, such as a breach in the head gasket that allows coolant to enter a cylinder. It is crucial for owners to differentiate between the types of smoke and their timing to address any potential underlying issues effectively.