D 2008/2009 Cooling system W 09-08-01 Checking the coolant thermostat when uninstalled Commercial available tools – W 09-08-02 6 Checking the coolant thermostat z Remove the coolant thermostat. W 09-08-02 © 41120-0 z Measure dimension "a" on the coolant thermostat. „a“ = start of stroke at 86 °C - 90 °C a © 41121-0 © 02/2006 6021-001 1/2