Best way to drain/change the coolant?

[JOHNDQ]

If you coolant is in that condition to do it properly you will need to remove the thermostat. When you drain the coolant by removing the bottom hose it doesn't drain the coolant out of the engine block or heater so when u refill and run the car up it will all just mix again

[wu11ie]

Originally Posted by JOHNDQ

If you coolant is in that condition to do it properly you will need to remove the thermostat. When you drain the coolant by removing the bottom hose it doesn't drain the coolant out of the engine block or heater so when u refill and run the car up it will all just mix again

That's what I mean, I want to remove the return hose and just run the car till the water is clear or mostly clear to make sure all the rubbish is out before I put in new coolant. If the car is running from cold the thermostat should open as the clean water is running through so it should clean some of it out.

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[JOHNDQ]

Trouble is the thermostat wont open till 88 degrees, I your putting cold water back in then it wont ever open. Maybe try flushing though the system with a hose, run it up, drain it and do that again when drain it again should get more less all of it I guess. Obviously don't put cold water into a hot engine

[wu11ie]

Originally Posted by JOHNDQ

Trouble is the thermostat wont open till 88 degrees, I your putting cold water back in then it wont ever open. Maybe try flushing though the system with a hose, run it up, drain it and do that again when drain it again should get more less all of it I guess. Obviously don't put cold water into a hot engine

Yeah that makes sense, I could just do it over the course of a few days, fill it and empty it till it runs clear.

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