Coolant leak

[lexus22]

Checked coolant today, surprised that is needed 2 liters to bring up to top of radiator 🤔

Noticed that water is leaking from somewhere on the left of engine block, trouble is that it leaking from lower down, so can't get a view of exactly where it's leaking from, need to put up on a ramp but Santa never brought me one at Xmas 😠 is there a water hose or fitting down there that could be causing the leak?

[lexus22]

So mechanic got a long mirror and a torch down there and diagnosed leak from thermostat housing, which is good news as reckon easy job to replace thermostat and o ring. Apart from the original Lexus coolant, is there another pink coolant that is okay to use? 

[lexus22]

Forgot to ask, assume fill with coolant, run engine with rad cap off, leave until all bubbles stop🤔

[lexus22]

So getting the thermostat housing off was not possible as one of the nuts cannot be removed due to there being some sort of silver cannister obstructing it 😠 . What the heck is this thing? Online videos do not show this cannister🤔🤔🤔

[steve2006]

Nothing showing on the exploded diagram, could you post up a picture?

[lexus22]

Hard to get a photo as it's situated below the thermostat housing, appears to be bolted to the engine, has quite a few pipes going through it, of different sizes🤔 strange that it's not seen on any online videos of is300, maybe it's a flux capacitor 🗓️