I ended up installing a loop between the aux water pump and the hard return line. It’s 19mm on both ends, so a 19mm 180 degree bend hose works. The ends of the 2 hoses that attach to the heater core at the firewall are different sizes, but the other ends of those 2 hoses at the aux pump and the return line are the same size.
I didn’t remove the aux pump or bypass the loop to the DCT. Looks like temp sensors in the transmission control the aux pump, so even removing the full HVAC system wouldn’t stop the aux pump from running. See DCT info details here.
https://www.m3post.com/forums/attach...4&d=1317583307
I brought it up to temp in my driveway and all a seems stable and flowing well. Will be on track at WGI Monday and Tuesday to give it the full test.
All in, shed over 80lbs this winter.
AC pump, condenser, and lines.
EVAP system delete
SAP delete
Rear parcel shelf delete
Heater core delete
Washer reservoir and fluid
BW CF headlight blanks
Rear O2 sensors and extension wires, brake wear sensors, and various other metal bits and and further wire thinning