Cylinder #2, where the valvestem broke

metal in cylinder #4, btw is that a keeper?

OS intake valves + pro2's = NO NO, i've learned my lesson guys..

Scars from metal debrees on cylinder #4

Lucky Chamber #2..



It started when i missed a power shift from 1st-2nd, did a few more runs, pulled over and i noticed the car was smoking.. didn't know from what, i figured it bent a valve. on the way home i went into vtec and motor quit.. lost all compression

and 9 months later i finally pulled the head off..



before i pull the motor out (which it will probably be never) do you guys think my bottom end is good? (crank, rods, oil pump, etc) I know for sure i'll need new pistons if the motor is rebuild able.. what do you guys think?

 

Oh my god.. sorry bro..that looks nasty what happened.. keeper gave? or what.

 

actually, that "keeper" looking thing is from my valve guide now that i think of it. all the keepers are still intact..

i think i bent a valve on the misshift, then on the way home i went through the powerband and that's what broke the valve which sent all the crap into my intake manifold and all the metal that went into it poured into my other cylinders.

 

this was all in my intake manifold

 

When you think something is bent.. rule of thumb dont push your car anymore? ? you live in and you learn.. sorry for your lost

 

i dont get ho would a power shift from 1-2nd would bent a valve?

did you have your rev limiter set up way to high?

 

ok, motors blow, we learn the hard way on some things but...

wtf
"
noticed the car was smoking.. didn't know from what, i figured it bent a valve. on the way home i went into vtec and motor quit.. lost all compression
"





also, what valves are they? i've never seen a honda valve head come off.

 

He probably floated a valve and it touched..

 

I wouldn't blam the os valve's and running pro 2's unless you were not sure on the clearances

 

the clearances were checked by a shop, obviously they didn't do it correctly, everyone check out the intake side on the pistons, they all have scars from the valves.

rev limiter was set at 9k, i'm sure the supertech valvetrain wasn't the blame, these are ferrea valves with 1mm os intake valves. the extra 1mm was a $2-$3k mistake

 

Good job man.

 

and they said not to use over sized valves.... sorry for your loss

 

car smoking...maybe bent valve...but lets hit vtec anyway...


hmmm smart

 

the block should be salvageable. i'm not positive about the head, but maybe you'll be able to get a port and polish to clean up the head?

 

Looks to me like the valves have been kissing the pistons.
Regards Uncle Dave

 

That shop should have fly cut the pistons to fit. Sorry for the loss. May the next one be more relieable

 

Sorry about your lost Bro... That sucks but looks like you dropped that valve.... I would think that your bottom end is salvageable but it wouldn't hurt have it inspected for any damages... From the picture of chamber 2, its looks repairable... I would consult cccylinder heads...

 

well a guy from this local shop made me a deal on the ferrea valves for $100 bucks that i couldn't pass up, he somehow stooped me into buying them.. at the time i didn't know what cams to run so i purchased them. got the head machined.. etc.

and i read up on pro2's with os valves and many just said make sure all clearances are fine. so i had a local shop degree the motor.. which obviously they didn't do

 

I know....its always the shops fault. And anyways doesn't skunk2 recommend to not use oversized valves? There are so many variables that i dont think you can blame the builder.

 

How did he stoop you into buying them? You should have researched the cams more before you bought oversized valves. Std. size valves go for around $100-120 a set. Did you even bother asking the shop what Valve to valve clearances were?

 

Degreeing in cams does not tell you your clearances.

If the machine shop had measured P2V and V2V, this would not have happened.

And you CAN use OS valves with Pro-series cams, you just need to measure V2V and compensate by advancing the exhaust cam even more (in the +5 to +7 range).

 

This.

 

Damn, i remember a few months ago you were putting this motor together.. ..had some good hopes for this motor.. sorry again dude.. :-\


you learn tho.. If you aren't 100% trusting run what you know will work.. which isn't OS valves.

 

i did not blame it on the shop, skunk2 does not recommend os valves. at the time the motor was built and ran/broken in with stock gsr cams.

the guy was in major debt so he was selling all he had..he said things along the lines of "os valves will give you more power, blah blah", and he cut me a deal

at the time i didn't know what cams i wanted to use. that's why i couldn't research yet. when i found out i wanted to use pro2's many people said you can run pro2's with os valves, you just have to check and compensate all the clearances like 92typer stated



my tuner was the person who degreed the cams, they said they clayed the motor and all the specs were fine. i specifically told him i had OS valves, and skunk2 did not recommend that....

all in all, one thing led to another which led to my catastrophic failure

 

After waking up, drinking more coffee, and re-reading your first post, it sounds like the missed 1-2 shift caused the valve to float, causing contact with the piston resulting in a bent valve. Once the valve was bent, it was only a matter of time before the valve dropped completely.

If you had V2V clearance issues, you would have encountered disaster upon first trip into VTEC. What were your camgear settings prior to the failure? I can guestimate based on that whether you were going to touch valves.