Fredster

Just yesterday I took a spin on the track, everything was going well until i missed 4th gear and yanked it into 2nd at 9k+. I immediately slammed on the clutch but it was too late. My car shut off and wouldn't start again. I'm pretty sure the head received massive damage, bent valves etc, maybe even hitting the pistons. Now my question is.. for all of you who have encountered the same problem, what have you guys done? rebuild? price? is it just cheaper to buy another engine? if yes, would the f22 interchange with f20? any modifications, aftermarket parts, done while rebuilding?

mikegarrison

Typically the answer is yes, it is just cheaper to buy a new engine. Other people have done the F20C -> F22C swap, so it's possible.

tronvex

I came close to over reving in second gear while I was coming to a corner. Yeah, buying a used motor would be cheaper then rebuilding.

ChefJ

You can find a good used shortblock for around 3k nowadays. If your car shut down then it definetly received some massive trauma. Well a 9k shift into another gear means you probably hit 11-13k at least. Sorry to hear that.

negcamber

I would say you would be lucky if the valves are just bent...at that rpm, you probably broke one off. If so then Mike is right...time for a new motor since the current one probably has scored cylinders and mangled head.

But...if it is just a bent valve, you may be able to get away with a head rebuild.

Pull the head and peek inside.

RacingEmotions

your valves are bent for sure. the block should b ok since u said u immediately disengaged the clutch. but no guarantees. you probably can get away with just rebuilding your head but check your block or get someone 2 check it before you do anything.

Billman250

It is rare that an s2k breaks valves, but surely it happens.

I have replaced/lapped in new valves and replaced the retainers many times in your situation.

A few light blems on the pistons can be easily sanded smooth by hand with sandpaper.

RedY2KS2k

Nobody can diagnose this for you. Take the engine apart and see what's damaged and how badly.

ChefJ

When I had my money shift the car would still run. we yanked the head and found all 8 intake valves and 4 of the exhaust valves were bent pretty badly. I got lucky, but I wasn't at the rpm level you were. I was around 7k and half shifted back into 2nd.

mikegarrison

Yes, I agree. I should have said that in my first post. Until you take it apart and see what's wrong, there's no way to know for sure. But it's still true that often a new (used) engine is cheaper than fixing the old one.