No, I wouldn't consider it dealbreaker at all. You have to remember that you're looking at a truck that's 20yrs old with 140K on it. To be perfectly honest at this point *most* of the truck's value is in the body & interior. You should expect some wear on the engine, chances are the piston rings, valve seals & valve guides are somewhat worn so sure, I'd expect a little smoke when starting it but as long as you're not laying down a James Bond/Spyhunter smokescreen as you drive down the road then I wouldn't be too concerned. I wouldn't get wrapped up in the little stuff. If it runs well, drives nice & shifts good then I'd consider it a good truck for the money. Sure, it's a good idea to make sure there's some anti-freeze added to the coolant because it lowers the boiling point of the water & has anti-corrosives added to it but that shouldn't effect the deal in any way, that's the sort of thing you do when you get it home & start going through it. If you want to look at any truck closely enuf you'll find all sorts of flaws to focus on, but then guys fixate on that stuff and wind up passing on trucks that they should grab becase they're looking for a "perfect" truck. Fact is that for $3K you're simply NOT going to get an always garaged, only driven on weekends truck that someones Nanna owned. Those trucks are out there but they run upwards of $10K. From the info provided & the photos in the ad this is a *very* good truck. Will the engine & transmission show some wear ? Sure they will, but they aren't significant problems right now and I doubt they will be anytime soon. The body & interior are in excellent condition (which is a LOT more than most trucks of this vintage can claim) so if you take care of it and keep up on everything, when you DO finally replace the engine and rebuild the transmission you're going to have one **** of a nice truck that will look great and run beautifully for another 20yrs (or longer if you run synthetics, use premium filters and really keep up on the maintenance)