The front hard coolant lines to the rear heater failed on my 1996 LX450 leaving coolant all over the ground. I replaced the rear section of the hard coolant lines, which was easy enough, but I see no way to replace the front lines that go between the frame rail and the bodypan and then over the transmission and then behind the head. Either I have to pull the engine forward 4-5 inches, or lift the body off the frame. I can't find a method in the FSM to change this line. I have the replacement line, and I don't just want to patch the current line since it will fail somewhere else. You would think they would do a better job of corrosion protection on these lines. My 1985 4Runner also had these lines rust through. Any ideas how to replace the lines? BTW, this engine blew its HG at 90,000. Lexus would do nothing to help fix it. The truck has 130,000 miles now on the replacement HG. The replacement HG may have failed again due to the rapid loss of coolant.