When water has been entering the combustion chamber from a leaking head gasket or a crack in the head, there will be carbon on the surfaces of the combustion chamber and piston.

Question

Quizplus · Accepted Answer

Water entering the combustion chamber from a leaking head gasket or a crack in the head typically results in steam cleaning of the surfaces, leading to unusually clean areas rather than carbon buildup.

When Water Has Been Entering the Combustion Chamber from a Leaking