XC70 AWD L6-3.2L VIN 98 B6324S (2009)
try to set the piston just before top dead center (TDC) and redo the test. When repeating the leak test on the same engine, there are usually variations in
the results of the measurements. This is due to changes in the engine coolant temperature (ECT) and the piston not reaching the same position as in the
previous test, and is affected by the amount of oil on the piston rings at the time.
Install the spark plugs. See: Spark Plug/Service and Repair