Volvo Workshop Manuals
XC90 2.5T AWD L5-2.5L Turbo VIN 59 B5254T2 (2003)
Powertrain Management > Tune-up and Engine Performance Checks > Compression Check > System Information > System Diagnosis > Compression Test > Page 4269
A mechanic's stethoscope or a rubber hose can be used as a listening device.
Note! There is leakage at the piston rings even on a perfect engine. This is the only place where a small leak is permissible.
If a leak is detected that is assumed to come from the valve system, first check that the piston in the relevant cylinder is at top dead center (TDC).
Use: 951 2775 Cylinder leak tester See: Tools and Equipment/951 2775 Cylinder Leak Tester.
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