how do you bleed the air out? just run the motor with the line diconnected from the gauge? and this may sound dumb but how do i insulate the tube? sorry i just havent done this before.
I disconnect the coil wire so it doesn't start, disconnect the tube from the back of the gauge and place it into a small soda bottle or the like. Give the key a bump or two till you get a solid jet of oil out and then reconnect. As for insulating it, if you have it running thru the firewall slide some split vacuum line over it so it doesn't rub and cut thru. If you split some rubber line and place pieces over the tube it dampens the vibrations, and it should be supported over some of it's length to keep the vibes down.