A general question about O-Ring sizes in the O-Ring kits that you can buy for your specific car (1992 Buick).
How do you know what the correct diameter and thickness is of the O-ring that you are installing on the line connections ? It seems that there are different sizes that will fit - some tighter and thicker than others.
Is there a chart that says "use this this size o-ring at this connection"?
thanks