2

No, that is not a good assumption. Not that I can tell you off the top of my head even which way the coolant flows through the heater matrix, it could flow either way. It can flow all the time when the HVAC isn't even putting air through the heater core, meaning both hoses would be hot all the time. I can also be that there could be a valve in the coolant ...


2

I am not at all familiar with the vehicle in question, however you may want to consider looping the coolant flow rather than blocking it off. Install a hose from the engine heater core inlet to the engine outlet . This will simulate the natural flow and reduce the risk of air pockets which can cause overheating issues.


Only top voted, non community-wiki answers of a minimum length are eligible