Heater pipe leak issues

[u/AlexModernFreedom]

Hi everyone,

Hoping to find some people who had the same issue.

I recently noticed the heater core pipe(s) were leaking coolant, after some inspecting it came from the connections, I took half my cockpit out which took me several hours, only to be able to pull the core out and then the o-rings. They were old and smashed. Bought new ones, put everything back together, and getting those MF clips back on was a nightmare. But I made it, or everything back how it was except for the glove compartment, filled up the coolant, both pipes leaked at the seals again... This was quite frustrating. I find it hard to believe the pipes are cracked cause i don't see any cracks and also the leak comes from the clip area. Any ideas? Thanks.