This morning I think I got a little ballsey with my stock valve springs in my First Gen B16A, around 8500rpm I had a piston slap my valves, they said "psht, back up foo". There is lots of damage to the number 1 combution chamber and slight (very little) damage to the other 3. There is a valve stem sticking out of the piston and some large holes in it. I know I am going to need to replace the pistons, prob. go with a 82mm and over bore it, I wanted to do that anyway. What I am concerend with is the head. Does anyone know any machine shops that fix these old heads? I remeber a write-up in Turbo or Sport Compact Car several years ago when they did the same thing on there LS-Vtec that broke a timing belt, and the did a break down on the company the repaired it, however I have looked an searched and can not find it. Help a brother out!

 

Also if somone could tell me how to post pics, I will. I got some NASTY pics I am sure everyone would have fun looking at, when I hit the inset image button it just puts some html img crap up there, do I have to upload the somwhere? I would like to post the pics...

 

Yeah man ya gotta up load them. Just go to http://www.photobucket.com and then you can cut and paste the links into your post. I wanna see this pics. Sounds like some good carnage .

 

where is winter springs?

 

Here are the pics thanks for the info on how to post them!

Combustion chamber

Piston

This happened this mornig around 5:40am on my way to work. I had it towed home. When I pulled the first three plugs they were all wet, it seems some metal was flying around and got stock inbetween some of the other valves and there seats, so they could not close.
I installed new HIGH LIFT cams (these bastards are BUMPY!) last night, however, I checked all clearences, adjusted the valves and ran them last night, HARD. Last night I tooked them up to about 9200RPMS 2 times (2nd gear then 3rd), and everything was PERFECT, along with about 12 8200 to 8500 rpm pulls, no problems. This mornig this happened at under 8500!?!? The cam gears had not slipped, the belt had not sliped, I checked the gear angles to the crank and everything was cool. I wonder why this happedend?

 

Contact DonF, he may be able to help you salvage the head if it is possible. Also, with the valve springs it takes a couple of passes of repeated stress to get the springs to weaken, that is why some people can **** rev it a couple of times before total failure. Also, you may have tapped it before, but only a minor contact (minor being relative), and taking it up there again sealed the contract.

 

yep contact DonF his info is in my signature. My head was about that bad before I took it to him and now it looks perfect.
Matt

 

That thing is definately fixable, a little welding in the chamber and new seats should do her right up


Dave

 

Damn. I would have thought that head is a goner.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by djphonics &raquo;</TD></TR><TR><TD CLASS="quote">Damn. I would have thought that head is a goner.</TD></TR></TABLE> I wish I would have known that when I dropped a valve this summer in my A6 too.

 

how much you think it'll run to fix that.... ihave a head that did the same, but its p&p and stuff it hurts to throw it away.

-joseph

 

Hey insomniac791, how much did it run you to get your head fixed?

THANK YOU dr_latino999 and insomniac791 for the fast info

Thanks Dave for the extra peace of mind that im not tottly screwed

Thanks djphonics for telling me how to list pics

si0385. I am in Tuskawilla, this happened on 417 just after I got on at Aloma (426). Where you at?

Hoda-Tech Rocks! I have been reading posts on here for years, I have a feeling I will become a regular here!

Come back Baby

I miss you already and you just left me this morning. DAMN THOSE CAMS PULLED HARD!

 

I dont think thats going to be fixable. Further more, is it cheaper to just buy another head?? If you cracked that head there is no way to fix cracks unless they are peen-over but even thats not fixing it, its only to make it work until the head finally cracks all the way through. I think that its in your best interest to just find a replacement head for a few hundred. Its going cost you a few hundred to fix it anyway.

 

I also garuntee you that there is more damage than you can see. When aluminum is cracked its not fixable because regardless if you weld over the crack its still going to be there just not on the surface. So when the aluminum heats up after time the crack will only expand.

 

Word nick, it is a stock sir1 head, I have been alredy cruising EGay for a new used head, but still have to inquire about fixing it. this morning I did not relize I could buy a b16a head for as little as 300 to 400. Thanks for everyones input.
I would still like to know how much the others paid to get there heads fixed, it would suck if I had 1500 in machine work done to it.
I still wonder why it happened, if you read my previous posts, everything was done properly with the cam install. I reved the **** out of it yesterday (alot higher then this morning) and it was cool mo g. This morning I was under the stock rev limit...

 

ouch.. that looks like it hurt.. good luck with the rebuild

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16aef4dr &raquo;</TD></TR><TR><TD CLASS="quote"> This morning I was under the stock rev limit...</TD></TR></TABLE> That's how my A6 let go. A couple days spent chewing the Rev Limiter at various events, and passing someone on the highway at 5500RPM.....~sniffle~

 

I sent you a pm.
Matt

 

pretty uncommon to see this in a honda engine, i bet if you left the stock cams in it wouldnt have done that, what cams were u using? my guess they required aftermarket valve train and itd show a perfect example of y not to use stock ****.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mycrx7 &raquo;</TD></TR><TR><TD CLASS="quote">pretty uncommon to see this in a honda engine, i bet if you left the stock cams in it wouldnt have done that, what cams were u using? my guess they required aftermarket valve train and itd show a perfect example of y not to use stock ****.</TD></TR></TABLE> I had a stock cam it did that in my motor, what now?

 

lol i duno, obviously something was wrong, ive been around hondas and morons revving the **** out of them for 5 or 6 years now and i still havent seen anything like that, well one on my friends crx with a b16a in it but the kid missed a gear.

 

Eh latino you cna't complain, you have a pretty new Z6, also how often did take it all the way up to 8500, I have my ECU chipped for 8700 all stock internals, havn't actually taken it there on the street I start to get antsy aroound 8300, I'm just trying to learn from your mistake.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by M15 &raquo;</TD></TR><TR><TD CLASS="quote">Eh latino you cna't complain, you have a pretty new Z6, also how often did take it all the way up to 8500, I have my ECU chipped for 8700 all stock internals, havn't actually taken it there on the street I start to get antsy aroound 8300, I'm just trying to learn from your mistake.</TD></TR></TABLE> I have a pretty Z6 that the first thing it is going to see is an upgraded valve train to successfully see 8000 with the cam I have my eye on

 

i have one question. WHY the hell were you revving sooooo high????????

 

its the non stock honda cams that did it i tried for months to blow up my old a6 bounced it off the rev limiter prolly 4 or 5 times a day for about a month and never blew(smoked a little though), and actually now its my friends, it got new rings, valve guides and bearings and runs like new.