Do It Yourself: Yes
This issue has haunting me quite long. I found the root cause much earlier but due to part unavailability coz of low demand, I have to wait for another couple of months for it.
Well, it arrived at last. To change the hose is quite straight forward minus those challenging spots which are hard to reach. Alas, bleeding the system is quite a daunting task. Anyway, here are the photos for the whole job.
The part number
Bottom hose need to be replaced, red circle – bleeding nipple
This is where the coolant rested from the leaking spot
Red circle – bleeding nipple
The other end is at the thermostat housing, the hose was not in good shape. Coolant sipping thru the hose clip due to rubber wear.
New and old
Done, this is the hardest part to fix
My self made bleeding extender bottle
A few round of vinyl tape to fit the coolant tank neck