Hello,
I have been fixing minor issues with my 03 MCS and noticed I was leaking coolant from the heater core feed line at the firewall so I replaced the line only to find that the aluminium line that is inside the car directly attached to the heater core is damaged.

I have new parts coming to fix everything, but in the mean time, I cant just let my car sit broken, so does anyone know what would be the best way to circumnavigate the damaged heater core? I have 2 options and I am not sure which is the best.

1- Cap the feed and return lines just before the firewall and be done with it

2- Make a "U" section of hose and connect it between the feed and return lines to simulate the flow through the heater core.

I dont want to damage the cooling system or anything, and I just dont know the best way to temporarily fix my car until I have time to replace everything.

I appreciate any thoughts or suggestions.

-Kevin

 

I think the U section of the same diameter would be the best in the short run.

Here is the parts and a link to :

https://www.northamericanmotoring.co...-in-cabin.html




Thanks and hope you can get things fixed.

 

Thanks for the help.
I dont suppose you know if I need to remove part #4 on your diagram when I get ready to change the metal lines? I havent found much info on changing them.