I got a hold of a junk Garrett turbo from a 617 with a seized turbine (been sitting out in the elements) and played with getting the wastgate cover off. The spring was corroded in by the oxidized aluminum groove that it sits in. After a lot of scraping and with the help of penetrating oil, I got the spring off. I then tried getting the spring and cover back on and have not been successful yet. Maybe I'm just clumsy but this job seems to be a royal PITA do do in situ if I am having problems on the bench.

I am going to try a manual boost controller before trying anything else. I think my adjustable fuel pressure relief valve should work just fine.

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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