How to: Tomy Real Steam Loco Repair

ah ok. so distilled water keeps the inside from being dirty?
how does it even make steam?
how does the thing even work?
metal makes 'steam'?
why was the big bulky thing on the side needed? the original metallic thomas didn't have one

these are the questions that flow through my head everytime i see it


EDIT: i had the engine on with the cap off and it was through the phase where the whistle blows and steam puffs out repeatedly
it whistled and it made steam
JUST NOW AS I AM TYPING THIS IT IS STEAMING CONSISTENTLY
it is fixed !

it was a fluke. he not steaming now.