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Trying to remove the head of my n42/n42 the bolt circled in green snapped on me with one thread showing on the piece removed. Which means it should be below the block surface and not preventing me from removing the head, right? The bolt with the blue arrow felt as though it was cross threaded all the way in, and now that I have it backed out as far as it will go it just continues to spin. Ive tried prying up on it while turning it, ive tried tightening it again, ive tried beating on it in frustration...right now I have vice grips on it trying to pull it out. I dont know if they put a long bolt in a short hole and it mushroomed out on thebottom and is preventing me from getting the head off or what. I have hit it with a rubber mallet and have a pry bar wrapped in paper towels inserted in the intake port trying to yank on it, but the darn thing wont budge. And yes, I have removed the two head to front cover bolts. Does anyone have any helpful advice?

Hi everyone, I've been looking for a Z in all California for several weeks already and finally bought one. It's not perfect but it was Christmas and I got seduced by that light blue metallic color. Biggest problem, and the biggest of all Zs in general, RUST! I've been talking to my local Z garage and read a ton of documentaion and I'm well aware of the effect of rust on Zs. The owner of the garage and a a couple threads on that forum were listing values of rust-free Zs sometimes well below the bar of 5000$ but after looking methodically in all the US for such cars I couldn't find any even close to that price without a major problem somewhere. Coming from a wet/salty road/close to ocean area in France, I'm used to see rust on cars and I guess it doesn't bother me like most Z owners in the Sun Belt. That being said, I do want to treat that car the best I can for my limited budget and I seek advices. I got the car for 4750$, I dropped the price of a couple thousands due to the rusty parts (initial price was way too much). The body and inside is perfect, nothing to complain aboute. I drove the car for a couple miles and it's running strong. The pictures here show the worse of what I could find on the car, the front car picture is just to show that the Z is still a gorgeous lady and not a total piece of rust. I believe that the rust is mostly on surface on most (or all) part so I won't have to get parts removed/replaced, but it's all over on the underside of the car. The paint of the car isn't infected except for the front underside (see picture) + tiny dents which created rust on that line of metal at the very edge under the car (it might have a name in english but I don't know it... I'm thinking of getting a car jack and and stands and sandpaper everything underneath before treating it with the most appropriate set of anti rust chemicals. I'm not a car mechanics but I'm willing to learn. Every advices or comments is much appreciated.. and I'm of course happy to finally join the Z family! Thanks!