I hope this is the right group.  I couldn't find a group that was
specific to this.  I need to do some engine work on a 93 Suzuki
Swift.  I believe that I have leaky valves, but with the engine as old
as it is (130000+ miles) I'm betting that the rings are bad too.  The
main reason I think it's the valves is that the tail pipe is spewing
unburnt oil.

Now, I'm looking into the differences of cost.  Reconditioning the
engine that's in there versus dropping in a "new" engine.  I actually
wouldn't drop in a new engine.  I spent only $500 on the car last
year.  I'm hoping that someone here will know what machining work
might have to be done on the engine when I take it apart.  Assuming
that the rings aren't bad as well, I'm thinking that I should only
have to clean off the piston heads and the intake manifold, and
perhaps change some valves.

The real question is, is this work worth it when I can buy a used
engine from a salvage yard here in town, that's been run tested and
verified that all four cylinders have 150+ compression for $375 (but
unknown mileage), or purchase on-line an engine for $800, also with
confirmed 150+ compression and 70,000 miles (not to mention a
warranty).

What does everyone think (if I'm asking in the right place, if not,
please point me to the appropriate group).

Thanks,
Andy