[wardhill68]

1987 560sl
PO had bypassed heater core. After reconnecting it there is a slight coolant leak evident in a right side drain tube next to the transmission tunnel under the car. I suspect a leaky core but could it be a hose or hose fitting on that side of car?
is there a way to inspect without removing the entire dash?
Thanks again for all the help from this forum
Jeff

 

[Fonzi]

The hoses are visible in the blower and cowl vent area of the car. I had a similar leak on my black 1973 and solved it simply by tightening the hose clamps.

 

[Aussiemerc]

The heater core is at the front (ie cabin side) of the heater box so you may be able to check for a leak by removing the lower heater box -doesn't need dash removal. Check all the hose clips first though.

 

[wardhill68]

leak spied

After reconnecting the bypassed heater core I've identified a leak where the supply line turns into an aluminum pipe and bends into a black plastic housing. it is at this junction I can see coolant leaking. Can someone advise me on this situation?
looking for a picture of this system
Thanks