G'day,
Ive been working on my brother's VP removed transmission and the old one had "dried up" coolant on the transmission and I was wondering where it was coming from and found this -



I believe that is where the air conditioning water release would be coming from but its leaking coolant - does that mean the heater core is leaking as well?

How big is the job and what does it require to be removed
Cheers & thks
AP