Oil line for gauge

[Richard Farrant]

Originally Posted by rob love

Absolutely, but since the supply of oil will be more than required for the line and to do the little amount of work required within the gauge, it will compress the trapped air to an equal pressure, which will be read by the gauge. . There may be a slight to negligible delay in the reading of the gauge as the air compresses or decompresses, but it will be too slight to notice.

Rob,
I have to disagree on your last sentence, referring to one particular vehicle, (Daimler Dingo). If you have been working on it and go to start up and nothing showing on the gauge, alarm bells ring. I can tell you that it is much more of a delay than you describe, possibly due to the length of pipe. There is a difference between theory and practice. Having had 52 years on engines you don't take chances!