This head has extensive porting and over sized custom valves. Iridium plugs too.







A ring let loose and a piece of it worked past the top of the piston. The ring piece was banged around in the
combustion chamber for about 30 seconds and then exited via the exhaust.

I want to run up to 2 bar boost and have concerns about hot spots that could really mess with the tune.

Several tuners have told me to toss the head. One shop the machinist and tuner both said just run it like it is. One shop suggested welding it and shaping to the tune of $800.
What do you, my fellow S2000 owners think about this?

 

IMHO used heads are to cheap to not just replace it with one. I have one laying in the garage in great condition except an exhasut manifold stud is missing. 1 of 8. I can let it go for cheap.

 

p.s. that cylinder is dead.

 

I'd weld the chamber and have the seats and valves reground.

 

Phil , ive seen heads damaged much worse than that and be repaired as good as new . If youre going to scrap it send it my way

 

That can be repaired, but might cost a pretty penny. Also yes, time for new sleeves or shortblock.

 

My head did the same thing when it spit a ring out. I just sanded it as smooth as I could get it with a dremel tool and some sand paper. I put it on my current motor, runs fine. Im running around 15 psi and have not had any problems. However if you really want it to look like new, send it to endyne they can fix that so that you couldnt even tell it happened.

 

Can this head be saved?
No, it's toast. [ 1 ] [11.11%]
Yes, run it like it is. [ 1 ] [11.11%]
Yes with extensive chamber work including welding and reshaping. [ 4 ] [44.44%]
Yes, just flatten the damage out with a hammer. [ 2 ] [22.22%]
Yes, some other way so make a post and tell me. [ 1 ] [11.11%]
Total Votes: 9

229 views, 6 posts and 9 votes.


Well I left it like it was, lapped the valves and added a new bottom end. It runs fine at 22psi with no ill effects. No pinging or other signs of combustion chamber hot spots.

Artisan7471 had the right idea.





Just goes to show you can't tell how well a head works by just looking at it.

 

Original post was 6/26; this is two days later. Unless the original post came months after the head was reinstalled in the engine, I'd say that declaring success is a bit premature.

 

This happened a while back and I thought it would be educational for all.