Friend was going shifting from 3rd to 4th but accidently went to 2nd. Now car sputters at idle. People said the exhaust valves might be bent. For people who have over revved, what problems did you encounter? And was it as easy as just replacing the bent valves with new ones? btw its a h22a.

 

How high did you rev too?

Have you done a compression test?

Change your oil if you plan on driving.

 

In a prelude he was in 3rd gear at around 6k rpm and downshifted to 2nd and no i dont know how to do a compression test.

 

Just do a search on here for 'over rev', 'high rev' or 'oh ****'. There seem to be a lot of, well, retards, on here that don't know how to drive. How in the world you go into 2nd when going for 4th is beyond me....

 

It probably just jumped a tooth on the timing belt, check it out.

 

If the car does not idle right, more than likely you bent some valves. Only way to really know is to do a compression test. Mis shifting into the wrong gear and over reving causes that.

 

ouch... Kiss those exaust valves good bye.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Aron Parsons &raquo;</TD></TR><TR><TD CLASS="quote">Just do a search on here for 'over rev', 'high rev' or 'oh ****'. There seem to be a lot of, well, retards, on here that don't know how to drive. How in the world you go into 2nd when going for 4th is beyond me....</TD></TR></TABLE>
I did it and am not a retard. B-series in EF's w/ fuct up shift linkages are the most prone. Sometimes you get exited and pull the shifter towards you a little more than you should when going to 4th. I'm sure you'll do it before you die.

 

If i was to replace the valves, would i also need to replace other parts? or only the parts that are bent?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1_bad_EF &raquo;</TD></TR><TR><TD CLASS="quote">
I did it and am not a retard. B-series in EF's w/ fuct up shift linkages are the most prone. Sometimes you get exited and pull the shifter towards you a little more than you should when going to 4th. I'm sure you'll do it before you die.</TD></TR></TABLE>

I shouldnt have that problem seeing as how in 3rd im at 100mph............anymore than that is just plain stupid if you ask me, unless your at the track doing qt.'s, then im jealous

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Aron Parsons &raquo;</TD></TR><TR><TD CLASS="quote">Just do a search on here for 'over rev', 'high rev' or 'oh ****'. There seem to be a lot of, well, retards, on here that don't know how to drive. How in the world you go into 2nd when going for 4th is beyond me....</TD></TR></TABLE>

Well calling him a retard does not help answer his question.

I do agree on searching however, their have been many recent topics regarding this matter.

I would recommend checking the valves, in most cases they are bent. Unfortunatly.

 

Another vote for bent valves.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by w00t! &raquo;</TD></TR><TR><TD CLASS="quote">

Well calling him a retard does not help answer his question.

I do agree on searching however, their have been many recent topics regarding this matter.

I would recommend checking the valves, in most cases they are bent. Unfortunately.</TD></TR></TABLE>

I didn't specifically call him a retard, but he wasn't even the one who mis-shifted. The point of my post was that there are probably 10 current threads dealing with the same subject.

And I really doubt I'm going to mis-shift, especially if I were drag racing; all you have to think about is shifting while going in straight line, doesn't seem too hard to pull the shifter straight down into 4th. If it were on a road course or at an auto-x, it might be understandable. Not in straight line though....

 

Yup, I'm willing to bet he floated and tapped a valve too... My friend (Rukkus233) just did this same thing the other day in his B18C/EH2... When shifting from 3rd to 4th, it went back into 2nd and set the tach straight down (~10,000rpm)... Anyways his car idles a bit weird right now so I'm just run a leakdown test and if it checks out bad pull the head... Good Luck

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Aron Parsons &raquo;</TD></TR><TR><TD CLASS="quote">

I didn't specifically call him a retard, but he wasn't even the one who mis-shifted. The point of my post was that there are probably 10 current threads dealing with the same subject.

And I really doubt I'm going to mis-shift, especially if I were drag racing; all you have to think about is shifting while going in straight line, doesn't seem too hard to pull the shifter straight down into 4th. If it were on a road course or at an auto-x, it might be understandable. Not in straight line though....</TD></TR></TABLE>

Haha, good point. If you mis shift in a straight line your missing a few marbles...

 

Will the stock rev limiter prevent that?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by legutki &raquo;</TD></TR><TR><TD CLASS="quote">Will the stock rev limiter prevent that? </TD></TR></TABLE>

prevent it from going to 10,000 rpms yes lol.
preventing damage to the motor itself No
A friend I new a while back, who is a dumbass for other reasons than this, blew his rsx motor because he rdlined in third and downshifted into second instead of shifting into fourth

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by legutki &raquo;</TD></TR><TR><TD CLASS="quote">Will the stock rev limiter prevent that? </TD></TR></TABLE>
Nope, this over reving is caused because the motor is forced to rev... Under normal conditions the injectors cut fuel via the rev limiter in the ECU (if present)... We just have to try to shift good

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kataku2K3 &raquo;</TD></TR><TR><TD CLASS="quote">
Nope, this is over reving because the engine is forced to rev... Under normal load the motor is cuts the fuel via the rev limiter (if present)... We just have to try to shift good </TD></TR></TABLE>

Wow-really? my bad, I shouldnt have posted that without being 100% sure.
Sorry about that.....
Learn something new everyday

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dohcVTEChatch &raquo;</TD></TR><TR><TD CLASS="quote">

Wow-really? my bad, I shouldnt have posted that without being 100% sure.
Sorry about that.....
Learn something new everyday </TD></TR></TABLE>

Sure, ecu can't control the operators mechanical error of forcing the car into a lower gear and engaging the clutch. It can only cut the gas, which is irrelevant when the car has been put in a lower gear than the motor can handle.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Type R Bob &raquo;</TD></TR><TR><TD CLASS="quote">

Sure, ecu can't control the operators mechanical error of forcing the car into a lower gear and engaging the clutch. It can only cut the gas, which is irrelevant when the car has been put in a lower gear than the motor can handle.</TD></TR></TABLE>

Interesting, thanks

 

So if the valves were bent, replacing the bent ones with new ones would fix all the problems?

 

Yes, if you replaced the bent valves with new valves and the valve seats in the cylinder head are fine then you shouldn't have a problem... Run a leakdown test first, see if you get air coming out the IN and EX manifolds... If that turns up positive then pull the head... It's really the only way to know for sure... Good Luck

 

thanks

 

In addition to the valves, need to check the springs, retainers, keepers, valve guides, and seats. Make sure someone who knows what they are looking at sees the parts before putting it back together just to be sure. Pulling the head and replacing valves is no fun, but doing it twice is worse.

BTW, my math says that if at 6k, a downshift should only go to 7.5-7.8k. Little if any past redline. He probably was higher than that. A few hundred past red will not float the valves.