starchland

Same goes for n/a???

rikhemi

I have done two high speed runs, hitting 148 and 152 in stock form 50-60k miles ago and my engine is fine. N/A you should be good. Just remember to always check your oil level before you track or do a high speed run.

Billman250

Same in what aspect? piston temps?

zeroptzero

Having touched the oil jets in recent weeks I can honestly understand how people strip these things by accident. It is tight working quarters unless you are on a lift (which would be a huge help). The threads are very fine on the bolts and the engine is sitting on slant, which isn't overly noticeable when your nose is only a few inches from the block and you are lying on your back, lol.

It took me a few minutes to get one oil jet bolt properly installed, I put it in a few threads and backed it out several times until I got it to go in smoothly. If the bolt stops turning within a couple turns, back it out and try again, don't put a tool on it until you get the bolt fully seated turning by hand. When you start the bolt it has to be parallel to the block and since the block sits on a slant you adjust for that difference, going straight up won't work and the bolt will bind within 1-2 turns. If you're doing it by hand it won't damage things and you can back it out to start again, if you have a tool on it you will blow the threads.

Petah78

Same in what aspect? piston temps?
[/quote]

I guess he was referring to the fact that if the engine is NA, is replacing the bolt necessary? I am in the same boat, have no plans to go FI but was wondering if I should replace the bolts.

Thanks.

USAF_S2K

just knock it out, it seems like a hard job but once you do it im sure youll think its a piece of cake. all your doint is 4 bolts so just take your time and do it right. Also would be a good time to get a baffle put in your oil pan since you track/autox your car. Kill 2 birds with 1 stone. Good luck! ill be doing mine this summer and im not sweating it.

starchland

Same in what aspect? piston temps?
[/quote]

I guess he was referring to the fact that if the engine is NA, is replacing the bolt necessary? I am in the same boat, have no plans to go FI but was wondering if I should replace the bolts.

Thanks.
[/quote]
yeah basically what i was asking thanks. I always was under the impression that the condition for it to happen was sustained high rpm high speed driving, ie autobahn. but after talking to a few local members they agree its good piece of mind.

zeroptzero

Same in what aspect? piston temps?
[/quote]

I guess he was referring to the fact that if the engine is NA, is replacing the bolt necessary? I am in the same boat, have no plans to go FI but was wondering if I should replace the bolts.

Thanks.
[/quote]
yeah basically what i was asking thanks. I always was under the impression that the condition for it to happen was sustained high rpm high speed driving, ie autobahn. but after talking to a few local members they agree its good piece of mind.
[/quote]

On a N/A setup it is really to protect the cylinders from being scuffed during extended high rpm conditions due to excessive heat build up. There might be some conditions on the street where it may be helpful in addition to running at a track, if you are creating a lot of heat in the engine. What I can't understand is how it got missed with all of the track testing Honda did with this car before it was put into production. We've all seen the testing by the head engineer running the S2000 at Nurburgring, that must have been a tough test on the engine far above what you might see on an autobahn. I'm just surprised they didn't have engine failures during engine and track testing, but they cropped up on public roads after the car went into production.

I'd also recommend doing a baffled pan while you have things opened up to assist with oil starvation which is unrelated to the oil jet bolt issues.

Billman250

Last baffled pan I saw (trap door style) one of the doors broke off, got sucked against the pickup and destroyed the engine

Whatever testing Honda did, they didn't do it with a SCed s2k.

Obviously, FI on an s2k has the same effect as sustained high speed driving, most likely piston temps.

The FACT REMAINS that healthly s2ks, no matter what mileage, wind up scoring the number 4 cylinder within 2 weeks of going FI. They ALL had the old style bolts! Every one.

I'd like to start a list. If anyone knows anyone that this happened to post up.

So far:

-AROD
-Soul coughing

I know of at least one other. i will try to get the names.

Billman250

The reason Honda didn't having cylinder issues on the track during testing is most likely deceleration cooling of the pistons on every lap.