i think i may have torqued my head too tight. i bought a torque wrench from my local auto parts store for cheap. the only one they had that wasnt the size of your leg only reads in inch pounds. i torqued them at 20 ft lbs. after doing so i was curious how accurate it was. so i set up the torque wrench so that i could dangle 20lbs of weight from it. i dangled it from the wrench and it didnt click, so applied some pressure to make it click. im not sure how many extra punds i pushed, assumeing atleast 2 to 3 lbs more to get it too click. would this cause an issue? should i back the head nuts off a lil loose and then calibrate my torque wrench and fin where 20 is and re torque them?