What the Libra zodiac sign is all about: Libra is the seventh of the 12 zodiac signs, which begins its cycle in early fall every year during Libra seasonâwhich falls around September 23-October 22.
How it works. This schematic shows the component parts of a typical leak-down tester. The gauge on the right is held at a standard pressure by adjusting the pressure regulator while the gauge on the left shows an example reading of 85-or 15% leakage.
Leak Down Testing. Performing a leak down test can be very helpful in determining if piston rings have started to leak, valves are leaking, or if there is a headgasket leak into the cooling system. I purchased this leak down test kit from Summit Racing. It includes adapters for most spark plug sizes and works fine with my Toyota MR2.