Thanks again SW for great advice.
The comments on the turbo seals brings to mind some post on another web site about increasing the boost, by tweaking the waste gate, thereby dramatically increasing engine performance.
However from what you said in your post, maybe it is suffeciant to just replace the turbo seals to restore engine power.
Does anybody else have further comments on engine performance boost.
82 300TD Turbodiesal +250, 000
86 Volvo 740 GLE 220000
85 Honda Civic 120000