Level IV Member
Join Date: Mar 2014
Location: Northern IL
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 40 Post(s)
Feedback Score: 0 reviews
you would look for the coolant hoses leading from the block through the firewall, cut them, add an adapter to each end, and use a scrap piece of hose to close the loop. That's the easiest way, unfortunately you then end up with coolant left in the heater core and no way to drain it without sucking it out with some sort of vacuum.
The other way is to pull the dash, HVAC, and everything else, then unhook it. you still need to close the loop with scrap hose though... And I'm not sure where the blower fan mounts, so that may require some work too.
definitely heater core leak. They only leak when the pressure gets high enough, likely its a hairline crack that gets forced open under pressure, hence the hissing noise (steam and coolant spittle)
'15 Fiesta ST
'08 versa S hatch, 6sp (Traded for FiST)
'84 VW Rabbit GTI, running an Audi 1.8T
'13 Nissan Quest SL
'78 Mustang Cobra - next build, from 140hp to 300.
"A person who lives within their means suffers from a lack of imagination"