I'm having a time with my valve adjusting correctly. Can someone gives some opinion on the correct specs to use from the feeler gauge to adjust my valves.? I adjusted the valves at 0.008 intake and 0.0010 exhaust and tortured them at 14ft lb but the car keep vibrating so opened it up again and recheck them and sone was loose and some tight. I didn't make the tight when i adjusted them but they keep getting tight and loos.. Should i put them at 0.007 In and 0.009 Ex. Will that be ok..amd why they keep getting tight and loose after i torque them?