Installed the adjustable pressure relief valve today. It works! I can vary the fuel pressure up or down by turning the socket head cap screw and lock it down with the nut. The socket head cap screw I used is too long and does not lend well to using a hex bit since the temp sender in the head is in the way and the block too close not giving much room to work with. I will use a shorter bolt with a hex head on the next one and that should make it much easier to adjust. I want to put more miles on to make sure it is leak free. I have a white tissue wrapped around it right now and will inspect it in a few days- hopefully dry.

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked