Name that hole

[StreetPizza]

No, not a \'guess the porn star\' competition, but a rather stupid question, I\'m afraid. On the picture below, if I\'ve read correctly elsewhere, 1. is the overflow tank for the coolant system, 2. is the filler cap. I think. Assuming that\'s correct, what\'s 3? It has something written on it, but I don\'t read japanese... which also makes the owners handbook somewhat useless.

Cheers, and sorry for yet another stupid question on my behalf

[iaint]

3  = Air Separation Tank or AST.

Iain

[J4P RX]

Pah - I thought this was going to be an interesting thread with that title :bandit

Yeah 3 is the AST, and whilst it says dont remove it lies.  It can be good to take the top off to top up the system.

Lee

[amp]

check the seams as often as oil change..
these have a tendency to crack and fail..

[StreetPizza]

Oh yeah, the AST. I probably should have known that... Thanks, people