Overtorquing can cause the threads to be stripped for this engine and it would depend on the head gasket condition. If problem had been there for quite some time and with steel type gasket, it is not going to help much.
If the overheating occurs under the conditions you mentioned with the fans working continously, I would say the problem is more likely to be cooling efficiency. If the coolant is being sucked back into radiator and with no signs of air trapped in system after engine cools down, that would confirm my suspicions.
However if there are signs of air in system, I would say the head gasket is bad.
Friday, August 10th, 2012 AT 7:01 PM