My roomate was puttin around downtown today when all the sudden there was a loud noise coming from the motor, then just died. Long story short, tows the car home, pulls the head off and the #1 cylinder has a broken valve. The valve broke off at the stem, and I do only say 1...none of the other ones dropped, no contact or anything but the one that broke. I read an old thread saying how carbo build up can cause them to crack, but these valves are fairly clean. The head is shot, it cracked the cylinder wall clear to the bottom, and of course the piston is shot. I'll post some pics up tomorrow morning, but if anyone has any ideas that would be great. He was only drivin maybe 30 mph when it happened, and wasn't rompin on it before. Thankyou for any help fellas, appreciate it

 

His motor here....and it looks like theres gonna be some parts for sale, thanks guys.
https://honda-tech.com/zerothread?id=1353343

 

How is the retainer for that valve?

 

The retainer looks fine to my knowledge, I'll check for sure tomorrow.

*edit* Yeah, from what I can tell it looks fine. They are Omni retainers.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by clean rice &raquo;</TD></TR><TR><TD CLASS="quote"> They are Omni retainers.</TD></TR></TABLE>

 

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

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Riight, it must be the omni retainers that caused the failure to bad they are an excellent ti retainer. To the original poster were they the stock valves that came with the head? Sometimes stock valves fatigue and just let loose, how many miles did the head have on it? It sucks about your friends motor

 

Well, the valves were stock, but didn't have any carbon build up on them at all...just a little dirty. They came with the motor, was a first gen B16 so who knows how many miles were on it when he got it. When he first swapped it it ran like a champ for over a year, and then he decided to do this build. When he pulled the head the block looked really clean, could still see the cross hatches and the pistons were way clean. As far as the Omni retainers and what Hella was referring to, it kinda seems like some of Omni's products have seem to be going downhill as of lately. But I checked the retainer and it looks good. Thanks for the simpathy Matt

 

damn that sucks.... im about to put some m22s in my head with stock valves that i have had for 120k but lot of people say that stock valves are okay and are actually pretty tough so i decided not to get new ones. any other info on the motor and how it broke?

 

No more info, I'm gona take some pics here pretty soon, maybe that will help to try and diagnose the problem.

 

14-15 year old valves, I think they did good. Got a fracture in the last street race, over-rev and finally gave up the ghost. Waiting on my 14 year old LS with 185,000 to drop something.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DonF &raquo;</TD></TR><TR><TD CLASS="quote">14-15 year old valves, I think they did good.</TD></TR></TABLE>

Really, do valves eventually become just old and brittle Don?

_still waiting for Ty to bring the digi cam back so I can take some pictures_

 

Anything made of metal or composites has heat cycles and motion cycles. A valve can only go up and down so many times before failure. The more spring the larger the cam motion the fewer times untill failure.
Every time a rod or valve goes up and down is a cycle, think of torqueing your head or rod bolts 50,000 times.

 

damn that scares me my valves have like 130k on them

 

Wow, thanks for your help Don.....once again shinin some light. So is it just a matter of time before the other go?

 

Pics of the destruction....





..and the head....




Look at how clean this break is, sounded like a buncha ice thrown in a blender when it happened......

 

what valve springs was in them?

 

Rm gen 2's

 

very odd , but the lead looks like it can be salvaged . its definatly not the worse valvedrop ive seen. get that block sleeved

 

i would think the exhaust vlaves would go first cuz the heat from the exhaust.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hella_JDM &raquo;</TD></TR><TR><TD CLASS="quote">very odd , but the lead looks like it can be salvaged . its definatly not the worse valvedrop ive seen. get that block sleeved </TD></TR></TABLE>

Ya think man?? I was hopin the head might be salvaged but I wasn't sure.....I know they can weld some material in and reshape it. I'm gonna pm this thread to Brad from RLZ and see what he thinks. And no doubt about the block, I'm tryin to talkmy roomate into sleevin that **** to some 86 buisness

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by clean rice &raquo;</TD></TR><TR><TD CLASS="quote">Ya think man?? I was hopin the head might be salvaged but I wasn't sure.....I know they can weld some material in and reshape it. I'm gonna pm this thread to Brad from RLZ and see what he thinks. And no doubt about the block, I'm tryin to talkmy roomate into sleevin that **** to some 86 buisness </TD></TR></TABLE>

 

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

Ya think man?? I was hopin the head might be salvaged but I wasn't sure.....I know they can weld some material in and reshape it. I'm gonna pm this thread to Brad from RLZ and see what he thinks. And no doubt about the block, I'm tryin to talkmy roomate into sleevin that **** to some 86 buisness </TD></TR></TABLE>

That head can be repaired, the damage dosent look to bad, sleeve that bitch

 

I doubt he's gonna want to repair it. I'm sure he'll just find a used one and run that. The head isn't ported as of now, so I think that might be a more cost effective way to go. Be on the look out for me fellas, the head doesn't hafta have the vtec solenoid, distributor, cams or valvetrain. Mainly just wants the caps and bridges and no stripped or broken studs, thanks guys