Change Engine Coolant

[curtqn]

1stToyota:

Thanks for the reply. Where is it located on the back side of the block.
If I just drain the radiator alone. Is it OK?

[Yaris Hilton]

You won't have completely drained and changed the coolant if you do that.

Why do you want to change the coolant on a new Yaris?

[jambo101]

If you just drain the radiator you are probably getting only half the coolant as the other half is still in the engine.
Also curious why the need for a coolant change when the coolant from new should last at least till 50,000 , most people never change it till the car starts overheating at about 180,000 and a new radiator is required.

[1stToyota]

Originally Posted by curtqn

1stToyota:

Thanks for the reply. Where is it located on the back side of the block.
If I just drain the radiator alone. Is it OK?

If it's just a drain and refill (w/ a 50/50 mixture) draining just the radiator is okay. But soon as you start flushing the system you won't be able to get enough straight coolant in the system with just a radiator drain. And the block drain is roughly in the middle of the block...crack open the bolt and fluid will come out of what looks like a little faucet.