Kohler LH640 Automobile Parts User Manual


 
11
Figure 11. Radiator Drain Plug Location.
Figure 10. Coolant Levels on Reservoir.
Draining Cooling System
1. Stop the engine and allow it to cool sufficiently.
2. Check if the radiator is cool to the touch. Slowly
loosen the radiator cap to the first stop and allow
any pressure to bleed off. Then loosen it fully and
remove it. Loosen/remove radiator drain plug
and allow coolant to drain. See Figure 11.
Radiator
Drain Plug
Radiator
Drain Plug
Figure 12. Coolant Drain Plug (Some Models).
4. Remove overflow hose from reservoir. Unhook
inboard retainer and slide reservoir out of
supports. See Figure 13. Pour out the contents and
wash or clean as required. Dispose of all the old
coolant properly according to local regulations.
Figure 13. Removing Reservoir.
5. Reinstall the reservoir cap. Do not kink/pinch the
hose.
6. Flush the cooling system (see Flushing Cooling
System).
Flushing Cooling System
With system properly drained:
1. Fill the cooling system with clean water and a
cooling system cleaner recommended for
aluminum engines. Follow the directions on the
container.
3. If equipped, remove the coolant drain plugs
located on each side of the engine block. See Figure
12. Drain the coolant into a suitable container.
After the coolant has drained completely, apply
pipe sealant with Teflon
®
(Loctite
®
No. 592 or
equivalent), to the threads and reinstall the plugs.
Torque the two plugs to 36.7 N·m (325 in. lb.).
Coolant
Drain Plug