the ongoing coolant loss has been narrowed down to one area on the heater core.

backround: the coolant travels down the firewall an touches the carpet high up first where your left foot would be if you stretched it out up and over the brake pedal. from there it travels down the to reach the floor carpet on the left side of the drivers area.

the lower copper/brass coolant neck appears to be the source of the leak and if i am correct it is almost literally just behind the where the neck goes in through the firewall.

is there any fix for this short of the entire removal? i have tried bars leak 2 weeks ago and the coolant loss has been around an inch in the over flow tank.

today i pressurized the system to 13 psi and it dropped no more than 1 psi in 10 minutes. clearly we are not talking a gusher BUT it still makes the carpet slightly damp and greasy feeling over time.

all useful ideas entertained.

at the moment i have bypassed the core by connecting the two hoses with a 90 degree bend... length of high pressure copper tubing.