"While-I'm-At-It-Make-Work: Pull that bad boy down to the block and install new gaskets everywhere. Change hoses also. There is a helpful thread about a leak free engine. No point in going through the hassle of just rebuilding the turbo and not going the short distance to do all.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.