I have not taken out my Behr evaporator (if it's NFG, work would stop right then and there) so I cannot tell what it looks like inside. On mine, the tubes that connect to the TXV are copper. Yours tubes look like it is aluminum? Do you have a pic of the other end of the evaporator? How about pics of the Siemens evaporator that was damaged in shipping?

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked