From previous sr's I came across that smoke here are some issues that I have encountered from first to last place.
1. Blown turbo (these things take more dumps then elephants with a stomach ache...especially redtops from the early 90's.
2. Blown headgasket (just get old and needs to be replace, sr's run hotter then shit so they are known for this issue
3. Leaking valve seals (get hard or break from years of usage.)
4. Cylinder wall problems (rings get bent and cause oil to burn through combustions)
5. Foul spark plugs (running to rich)
6. Stuck injectors
7. Vacuum leak
I think thats pretty much it. Hope some of this info helps.
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