I decided to do a retorque of the head bolts and found that they were all at stock 56 ft-lbs. Then I tightened them to 76 ft-lbs, only to find that they were already that tight also. Does this tell me anything about the condition of the head (gasket)? I've had the car for two years, dont know if the previous owner cared to do a HG change or retorque.