Most common cause is a leaking cylinder head gasket, but if this is after a repair that was done for the same reason, the next suspect would be a crack in the cylinder head. Was the head checked for cracks? The last thing would be a crack in the cylinder wall, but that isn't common.
Was the head checked for flatness?
Please let us know what happens.
Monday, May 1st, 2017 AT 10:24 PM