Resolved Slow coolant leak dripping from passenger side frame rail.

[Mustang5L5]

Remove the two clamps, spray a little penetrating fluid in behind the rubber and kinda work and twist them off the core.

 

[Mindseye007]

Doing pressure test as I type this so for no leaks...set at 16lbs

 

[Mindseye007]

20 minutes and the gauge has not moved off 16lbs mark No leaking under the framerail.

 

[Mindseye007]

All I did was tighten the clamp on the left hose coming off the heater core.

 

[7991LXnSHO]

20 minutes and the gauge has not moved off 16lbs mark No leaking under the framerail.

Hallelujah you got a tester going! Now leave it pumped up overnight. (Or at least several hours.)
I had the same clamp that needed tightened one of the last times I used the tester. When the car was running, the heat and airflow hid the drip. But cold pressure testing made it obvious.

 

[nickyb]

How did you get the 2 hoses off the heater core? Cut and tug with pliers?

yes exactly

 

[7991LXnSHO]

yes exactly

Cut and peel is easier on the heater core, unless your spouse does not trust you with sharp tools any more.

 

[Mindseye007]

Hallelujah you got a tester going! Now leave it pumped up overnight. (Or at least several hours.)
I had the same clamp that needed tightened one of the last times I used the tester. When the car was running, the heat and airflow hid the drip. But cold pressure testing made it obvious.

Its been 24 hours and no leaks so all it was is the left heater core hose clamp was loose.

 

[AeroCoupe]

You are gonna get more help if you start a new thread as this is a whole new issue.

 

[Mindseye007]

You are gonna get more help if you start a new thread as this is a whole new issue.

OK done.