Suzuki XL7 2007 Service Manual page 767

11. Attach the vacuum hose to the vacuum gauge
assembly and the vacuum tank.
12. Open the valve on the venturi assembly. The
vacuum gauge will begin to rise and a hissing noise
will be present.
Engine Cooling System:
13. Continue to draw vacuum until the needle stops
rising. This should be 610-660 mm Hg (24-26 in Hg).
Cooling hoses may start to collapse. This is normal
due to vacuum draw.
14. To aid in the fill process, position the graduated
reservoir above the surge tank.
15. Slowly open the valve on the vacuum gauge
assembly. When the coolant reaches the top of the
fill hose, close the valve. This will eliminate air from
the fill hose.
16. Close the valve on the venturi assembly.
17. If there is a suspected leak in the cooling system,
allow the system to stabilize under vacuum and
monitor for vacuum loss.
If vacuum loss is observed, refer to "Loss of
Coolant".
18. Open the valve on the vacuum gauge assembly. The
vacuum gauge will drop as coolant is drawn into the
system.
1F-24