Could you explain the reason for clamping that one hose with the vice grip? My son’s Tiguan has this same issue, will be doing this when he’s home from college for Christmas. Thanks for the great video!
Are those coolant lines under the air box? It looks like you disconnected the lines around the engine side and not at the heater core it self. My Tiguan is doing the exact same thing. Appreciate the help.
I was able to rig one of those cheap Harbor Freight hand pumps to the hoses so I could agitate the CLR back and forth thru the core occasionally while it sat. Switch the ports and agitate from both directions. Im letting it sit overnight.Fit tight on my hoses but yours look larger.Thanks for the video !
I will try on my 2010 tsi Tiguan mine is not even heating lol I'm going to give this a chance before change the heater core, cuz is to much work to take off the part
I noticed my heater barely getting warm AFTER I added Bar's Stop Leak to the overflow reservoir a few months back because I have a slow water pump leak. (I didn't have $2500 for a water pump replacement for my 2013 VW CC!) The water pump seems to be a very slow leak now, but not sure if Bar's clogged the heater core...🤬 I wonder if radiator flush stuff will unclog the heater core...? 🤔
