Where Is The Best Place To Drain Off The Water

[Zdeno]

Does anybody know where is the best place to drain off the water from my 1991 LS 400 ?? I need to change water because I have a air in cooling system ( guys from here guess that ) and don´t know where to drian it off. Thanks

[mejojo]

See the bottom section on disposal of coolant.

Coolant Disposal

Joe

[spiller91ls]

There are two drain valves on both sides of the engine block, you have to remove the plastic cover from the bottom of the car to get to them, also you fill the engine with coolent from the fitting where the thermistat housing is( the fitting on top).

[99lsguy]

If you leave the bottom cover on.....

Does the coolant drain (maybe) to a certain area or do you think it just goes EVERYWHERE?

[tansupplyman]

Zdeno, don't know if you have done the drain yet, it not ,here is more verbage.

Take the bottom cover off(10mm); the drains on the engine[one on each side] are accessable between the track bar entensions and the aluminum subframe. The 10mm bolt heads are brass---use a ratchet with about 12" of extensions; also you will need approx. 24" of 3/8" ID hose. Put the hose on the outlet extension next to the bolt head and direct into a container. DO NOT take the bolt out; after turning a few turns the coolent will flow out of the hose. flows for about 15 min per side. remember to take off the cap or disconnect the rad hose connecting to the thermostat housing,--might want to open the air relief on top of the thermostat housing.

of course, the radiator drain is very obvious !!

good luck.