This is #1 btw......

Sk2 st2 cams, sk2 springs and retainers, work done by a professional....

Timing was ok before and after disaster

both exhaust cams were melted off...the tips...but valve remained

Springs and retainers still good...and in place

Good amount of oil....perfect

And brand new rings, OEM
.................................................. .................................................. ...........

Block may have been abused...history unknown

Any ideas?

 

wheres the piston hows it look?

 

ouch that looks pretty bad

 

A little more information is needed to determine that. Pics of the piston would help, is your timing belt broken? How were you driving the car when it happened? How high were u reving the motor?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by T.J. &raquo;</TD></TR><TR><TD CLASS="quote">A little more information is needed to determine that. Pics of the piston would help, is your timing belt broken? How were you driving the car when it happened? How high were u reving the motor?</TD></TR></TABLE>

Timing belt is perfect......driving was shifting around 6-7.....i could rev to 9k-95k but wasnt pushing it at the time

Piston is at the bottom of the oil pan, and the rest is in lil chunks in each of the other cylinders and also melted to the top of the head

 

wrong parts,bad install or over reved

 

looks like u dropped a valve in my mind, but ive never seen a cylinder look that bad after. one way or another at least one valve hit the piston and a chunk broke off of either and acted as a ping pong ball/granade inside the cylinder and jacked yo **** up yo

FIX THIS(it makes no sense):

"both exhaust cams were melted off...the tips...but valve remained"

 

I saw that happend on my brothers GSR, but he was running 17 pounds of boost. were you running any nos or turbo?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by C8V6C &raquo;</TD></TR><TR><TD CLASS="quote">Any ideas?

</TD></TR></TABLE>
How many miles did you drive it after the noise started?

 

Noise? I had no noises, wierd smells, smoke, etc......

The car just shut off, and no leaks nothing....I just figured it was an electrical problem until I took the head off

No turbo or nitrious.....although thats what I ment, the block coulda been abused before i got to it, with either or both

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by C8V6C &raquo;</TD></TR><TR><TD CLASS="quote">Noise? I had no noises, wierd smells, smoke, etc......

The car just shut off, and no leaks nothing....I just figured it was an electrical problem until I took the head off

</TD></TR></TABLE>
Good drugs and a loud stereo? That damage didn't just happen all at once, it took a while. Drive em till they drop.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by C8V6C &raquo;</TD></TR><TR><TD CLASS="quote">

Timing belt is perfect......driving was shifting around 6-7.....i could rev to 9k-95k but wasnt pushing it at the time

Piston is at the bottom of the oil pan, and the rest is in lil chunks in each of the other cylinders and also melted to the top of the head</TD></TR></TABLE>

Actually a Type r came into Acura here in greenville not to long ago same thing happen to it. The techs there took off the oil pan and the 3rd cylinder piston kinda fell on the floor in quite a few pieces. The only difference was the reason for it hap-ping was the girl who was the owner put diesel in the tank. Sucked for her because Acura would not warranty the motor.

 

ive seen similar damages.... not to the extent... but close... and we thought timing belt slipped a tooth or some

 

Damn I don't think I've ever seen a sleeve that fucked up. I'd like to know what happened!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chiovnidca &raquo;</TD></TR><TR><TD CLASS="quote">
Good drugs and a loud stereo? That damage didn't just happen all at once, it took a while. Drive em till they drop.</TD></TR></TABLE>

thats where youre wrong. when a big enough piece of metal breaks off in the cylinder it only take a split second to do that kind of damage.

for example 6k rpm = 100 strokes per second

either u sucked a rock through you intake(which i doubt) or a valve broke imo

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99B16Si &raquo;</TD></TR><TR><TD CLASS="quote">

thats where you're wrong. when a big enough piece of metal breaks off in the cylinder it only take a split second to do that kind of damage.

for example 6k rpm = 100 strokes per second

either u sucked a rock through you intake(which i doubt) or a valve broke IMO</TD></TR></TABLE>

Yeah he said that the valves melted. I going to have to say a good bit of the 2 exhaust valves broke off and did that to the piston.

 

yea theres no mystery here. i dont see why this is so difficult to grasp

 

Just out of curiosity, How many miles did you put on it after the work, And did you reuse the stock valves?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by h8tred &raquo;</TD></TR><TR><TD CLASS="quote">Just out of curiosity, How many miles did you put on it after the work, And did you reuse the stock valves?</TD></TR></TABLE>

Good question but really the only part that he would have need to milles on the motor would be the Rings to let them seat. This would not have effected the valves to break and destroy that cylinder.

 

Broke in rings for like 500+miles in no vtec.....and then babied vtec for a while, maybe 100 or so

The valve heads, only the very top came off, the rest remained.....

LOL, no music......and I even listened to the outside of the car, its was nice

Intake had a filter, so I think the "rock"? idea is off, lol

 

your valve broke from the cam flat spotting if thats what you mean by the lobes melting off

cams are designed with opening and closing ramps so the valve gradually sits back on the valve seat if this action is violent it breaks off the ehad of the valve or the seat

My b20vtec motor had this happen i flat spotted a cam the valve smacked the seat a piece of the seat chipped off and boom buh bye head it didnt do the damage that yours did but it fucked up the pistons and the valve head still itnact looked slughlty bent

 

Well, I was asking because, I wanted to see how long it took for this to happen... You had all this head work done, Cams, Springs, And retainers. The shop should have suggested you get new valves as well, Seeing as how the new cams are more aggressive, And the new springs stiffer. The stock valves were a time bomb, Trouble waiting to happen. You asked too much of them and this is where we are now. If you had this work done at a shop, I would question their credibility in such an oversight. It's something that's commonly over looked by most back yard mechanics, As well as cooling systems, And fueling... However, A good shop should have known... Just my .02 Feel free to add to, Subtract from, Or adjust my statement...

 

It was a good shop......Ill ask him about that......

If the valvetrain was too much, why didnt it go sooner? It only went after I got a new block.....about a week later.....

Worked fine for a long while on my other block

And why did only two go? instead of all 4 in a cylinder, or the others in the different cylinders?

 

See, All of this info is needed. How long did you have the setup on the old block? Why was the old block replaced?

 

The old block threw a rod.....that was my fault for having enough oil in it

I've learned.....and this last block had plenty of oil, was checked at the beginning and end of the day