My oil guage is sitting a little low when the engine is turned off. The needle is on the top of the "L". It is also reading low and I replaced everything that has to do with the oil except the actual engine. This is on my 66 and I have another 66 where the needle reads below the "L". So I am assuming this is my problem. So how can I adjust the needle? I took it all apart and even took off the actual guage so all I have is the guage. There is nothing really on the back of the guage to adjust it other than these little gears but I cant seem to turn them. Anyone know how to adjust it?