Coolant leak/new radiator + new condenser

AC408

MEMBER
2007 CHEVROLET IMPALA
5.3L
V8
AUTOMATIC
200,000 MILES

I just replaced radiator and condenser, after my radiator sprung a crack on the passenger side, shooting coolant all over while on the freeway. Immediately after changing both radiator and condenser, I notice coolant leaking after starting car for first time since repairs. Then air system of interior stopped powering in but I only had to replace fuses. Now air blows but not how it should. Hot air never gets hot and cold air never gets “AC cold”. Now when I start car it stays at mid heat as long as I’m parked, but once I drive about two blocks it starts to overheat.

I originally thought maybe the leak was due to over filling system with coolant. Like tends to be dripping from front driver side radiator end.

Any input would be helpful.

7 Replies

JACOBANDNICKOLAS

MECHANIC
108,328 POSTS

Hi,

If there is still a leak in the cooling system, we need to determine what is causing it. Also, if you haven't already, make sure the coolant level is full.

A leak can be a radiator hose, heater hose, water pump, and so on. Since the radiator is new, we can assume that isn't the issue.

To start, take a look through this link and let me know if it helps:

https://www.2carpros.com/articles/car-is-leaking-coolant

If that doesn't help, we need to pressure test the system. This is done with the engine cold so you can move things around easily. Here is a link that shows how it's done:

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

Now, you will need a pressure tester, but most parts stores will lend one to you,

Let me know what you find or if you have other questions. Also, let me know if you notice the leak from the front of the engine compartment or rear.

Take care,

Joe