That's the only way ( I did that twice to 2 different odysseys). Make sure you fill it back up to about 3.75qt/4 Qt. The oil cooler account a bit more.I bypassed the radiator lines and installed a small oil cooler. I added a gallon of ATF for now - probably needs more.
Now that the van can drive (pretty important!), I can eventually tackle other leaks.
Thanks for the update.Update -