Hybrid owners is this normal 'priming/prepping' noise or just mine?

[Bluevitz-rs]

The Toyota hybrid systems use a coolant thermos that stores hot coolant. When you start up a cold engine the system pumps the warm coolant through the head to speed up the warming of the engine.

[funky2nite]

Originally Posted by Bluevitz-rs

The Toyota hybrid systems use a coolant thermos that stores hot coolant. When you start up a cold engine the system pumps the warm coolant through the head to speed up the warming of the engine.

Do you think it's the same thing for our yaris hybrid? cos a look on the net only returns prius chats. Was a bit more concerned on the noise itself, cos it's a bit 'rattly' just like an old refrigerator's motor :/