If you used the proper size 1/2" drive torque wrench I'd say no, but if you used some wimpy 3/8" drive with an extension, I'd say yes you were probably flexing the extension. Did you do the proper torque sequence when tightening them? That is usually the cause of a head gasket installation gone wrong. my .02
If you use a very small extension you will not have any problems. Now if you are using like a 8" extension, I would go 5 ft-lbs more torque on every bolt/stud just to compensate.
Rule of thumb is increase torque 1/2 lb for every 1" of extension used. The torque spec for the headlbolts is 65-72 on the final sequence, so even with a short extension and no increase you will still hit the 65, so I would say unless you had like a 12" extension, thats not the problem.
Rule of thumb is increase torque 1/2 lb for every 1" of extension used. The torque spec for the headlbolts is 65-72 on the final sequence, so even with a short extension and no increase you will still hit the 65, so I would say unless you had like a 12" extension, thats not the problem.
The rule of compensating torque when using an extension on a torque wrench refers to when you change the drive end length of the wrench, i.e. using a breaker bar on the wrench for added torque. When that's the case, you use the formula
S=
T x La
-------
La x Ea
S being your answer, T is torque applied at end of adapter, La is length of handle, and Ea is length of extension in inches.
I've never heard of adjusting final torque when using just a socket extension.. then again we go strictly by the book only where I work.
I've never heard of increasing torque values based on using extensions... but I'm not a machinist either. When I installed my heads, the torque specs were in three steps. They went 35, 50, 70lb/ft and then for the long bolts, increase torque by 10lb/ft.