There are different ways a head gasket can blow. The gasket can break around
a coolant passage thus allowing coolant to enter one or more of the combustion
chambers. When you burn coolant, you will notice white smoke/steam coming
from your tailpipes. The break can be bad enough so that coolant drips out of
your tailpipes, or it can be subtle enough to notice just a slight difference in the
appearance of the exhaust fumes. Additionally, some head gaskets can break in
between cylinders, which will not be as easy to diagnose. In both cases, if your
head gasket is blown, you might notice a loss of power, rough idle, and/or
engine knock when under boost.
a coolant passage thus allowing coolant to enter one or more of the combustion
chambers. When you burn coolant, you will notice white smoke/steam coming
from your tailpipes. The break can be bad enough so that coolant drips out of
your tailpipes, or it can be subtle enough to notice just a slight difference in the
appearance of the exhaust fumes. Additionally, some head gaskets can break in
between cylinders, which will not be as easy to diagnose. In both cases, if your
head gasket is blown, you might notice a loss of power, rough idle, and/or
engine knock when under boost.