How to Remove Heater Core : Freightliner M2 Truck. 

Thank you for the insight doing this job this afternoon.

Great video. What year is your truck? And where did you get the cover?

You can also use a utility knife with a new blade to cut out the cover. Took me a total of maybe 3 minutes.

What tool did you use to unscrew the bolt on the engine side.

Qué buen trabajo un buen tutorial

Do you know O ring size ?

What year make was this freightliner