Help with heater core replacement on a 2009 Yaris

[Bluevitz-rs]

Originally Posted by jamez

I think you are right, Scott. I took a closer look where the hoses connect on the other side of the firewall and found a little bit of coolant pooled around the rubber grommet at the firewall. I put a second hose clamp on each of the hoses connected to the core and haven't noticed any more leaks. So I guess I got lucky this time!

Thanks very much for the help!

If that's the case, replace the hoses and clean the connections off. They're probably breaking down and failing.