The cylinders can be checked for leakage as an alternative to a compression test
WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
Using this method, the amount of leakage at the engine cylinders is measured and it is possible to locate the source of any leaks.
A similar check can be performed using a compression gauge by injecting oil in the cylinder. However, this can cause a build-up of coke.
The result will not always be decisive or precise.
In addition, the VIDA station or the Volvo System Tester (VST) must always be connected afterwards to erase any diagnostic trouble codes (DTCs).