I am replacing the intake manifold gasket on a 2007 Toyota Corolla. The charts seem to say that the bolts need to be tightened to torques between 80-110 foot-pounds (which seems like a *lot*!). But when I took the bolts off, it only took about 20 fp to remove them. How do I find out for sure what the torque I need for these bolts are? (The bolts are class 8 and class 10 bolts).