remove a heater core

It takes 5.3 hrs labor with AC. Here are diagram showing how to do the job.

Here is a heater core being replaced amd the air conditioner getting vacuumed down and recharged.

https://www.2carpros.com/articles/replace-heater-core

and

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Cheers,