Engine Mechanical problem
2002 Subaru Forester 4 cyl All Wheel Drive Automatic 77600 miles
when engine is cold, I hear a tapping sound, almost like a valve tapping or rocker arm tapping, when it warms to operating temp, sound goes away. I have
heard that this is " piston slap" and it is common in the subaru horizontal opposed engines. This poses no threat to the motor. Am I correct?