water hose coolant leak by firewall?

2008 CADILLAC STS

167,000 MILES • 3.6L • 6 CYL • 4WD • AUTOMATIC

CANDO1

MEMBER
47 POSTS

My Antifreeze will drip out along the back of my engine till the antifreeze reservoir is almost at the bottom then stop if I fill it to the line, it will drip out again to the same level, I cannot see where it coming from, I just replaced the motor mounts and can you Please send me information on replacing the hoses at the top rear passenger side. I know there are a couple hoses. it's not overheating when I drive it, nor does it lose any additional antifreeze.
Thanks

Sep 2, 2024 at 4:44 PM

JACOBANDNICKOLAS

✓ASE Certified Mechanic
110,193 POSTS

Hi,

I believe you are referring to the heater hoses. I attached directions below for replacing them. Let me know if that is what is needed or if it is something different.

Note that the thermostat housing is in the same area. You may want to consider pressure testing the system to locate where it is coming from. You will need a pressure tester, but most parts stores will lend one to you. Also, the directions are for the outlet hose. The supply hose is basically the same and install is the opposite of removal.

https://www.2carpros.com/articles/radiator-pressure-test
Let me know.

Joe

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Sep 2, 2024 at 7:53 PM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.