2.5 motor knocks when started


Asked by Feb 07, 2014 at 11:18 PM about the 2000 Subaru Outback

Question type: General

its a 2000 Subaru outback 2.5  it knocks for about twenty seconds after starting then stops. it runs fine after thirty seconds or so. I have synthetic oil in the motor which has 177.000 miles

2 Answers


Does the knock sound like its high in the engine or more toward the bottom of the engine? If high it's possibly lifter tick.

Jeff Smith

Typically this is due to piston slap in Subarus, and is not something to be concerned about.

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