I need to know what this hose is called and where it runs to. I was guessing the heater core? I also need to know the correct routing of the hose. Thanks……

 

http://shbox.com/1/heater_hoses.jpg

 

Thanks, anyone have any tips or tricks to replacing this hose?

 

Any sections of the heater hose can be replaced by scoring the factory swaged collar that clamps the hose to the pipe and then prying it up and "zipping" it off. You don't want to score deep enough to get into the pipe underneath. Some people use a cutoff wheel with a Dremel. The new hose can then be attached with normal hose clamps.