I need some help... my car has run great for 45,000 miles and now has a leak (after running a leak down test) in #2 exhaust valve (maybe burnt). I am trying to find out why?? I did a search for rough idle, which is the problem that brought this to my attention...but did not cover my problem...Thanks for any help.

Chapp

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1983 300SD 343K everyday car
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