I've swapping in an ER charge pipe & TiAL valve. The front DV came off very easily, but I'm having a heck of a time getting the rear return line to release - the grey ring closest to the firewall just won't budge. Before I start removing it the hard way, any advice?
There's not room for channel locks on the underside of the ring, and an attempt to use them on the to grab & rotate didn't work.
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