What was *really* causing the oil leak on the 2.5L Subaru Forester; leaking oil cooler o-ring! MANY shops completely mis-diagnose this failure as an oil leak from the Head Gasket. My suggestion, replace the o-ring FIRST, if the leak remains the same, then investigate the Head Gasket after the PCV system has been tested.
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Torque spec. for adapter pipe is 40 ft.lb.
what do u think causes the o ring issue, could it be overtightening of the oil filter?
Thank you. This was a huge help.
Thank you I have to do it in mine now I know