Originally Posted by vision.dynamix
until you strip the threads out of the aluminum head
There's always someone like you in these types of threads
"ZOMG u put lug nuts on without a torque wrench?!"
Cross threading the heads is a more common problem than stripping them out. Most of those spark plug boxes have instructions too for people who don't have torque wrenches like tighten until snug + 180* or something along those lines.
It's always better to use a torque wrench, but how much better? If good-n-tighten is good enough then settle for that. I'm not going to unbolt my motor mounts and lift the engine so I can fit a torque wrench on the side of the motor. Simply not necessary. If the motor is out of the car on the stand, it's another story.