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Mk2 Golf Chat / Heating issues
It’s a relatively new heater core 3-4years old and maybe 3000 miles so I doubt that’s the issue, no leaks and no air bubbles in the coolant.
I’ve shown here in red and blue what’s pipes are hot and cold, the bypass valves are the cutoff for where the heat stop, could this be the issue and I need to go back to straight pipes or new bypass valves
https://www.flickr.com/photos/204163945@N06/55059836466/in/dateposted-public/
Also car tax photo:
https://www.flickr.com/photos/204163945@N06/55060190840/in/dateposted-public/
Thanks in advance!