Any Ideas what could have happened?

I would like to figure out what went wrong to avoid any similar problems with the next build , thanks






















Modified by Reza^ at 7:10 PM 10/10/2007

 

wow! im no expert but it might be one or more things...the bearings looked like they were crunked on super tight and not up to spec...who did the bottom end assembly btw?

 

damn! carnage.

i dunno whats gonna do that dude, but. in for theories.

sorry about your engine, btw.

 

prob collapsed a valve spring and dropped a valve and it was all down hill fron their good luck with your new build

 

by any chance did your retainer crack in half?same thing happened to me in my b16 but the damage wasn't as bad as yours

 

did you ues any nitrous??? if not some how the sparkplug melted and strated to interfer wit everything else.....

 

Looks like a valve dropped.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mar778c &raquo;</TD></TR><TR><TD CLASS="quote">Looks like a valve dropped.</TD></TR></TABLE>

I am going to say a valve dropped also... ALthough I am still trying to figure out why the rod broke. Obviosuly once the rod broke, the rest of the damage is self explanatory. I can't see how a dropped valve would cause the rod to toat itself though...

 

Looks like you dropped a valve. Although the snapped rod is unusual aftermath

 

is it me or the good cylinders look pitted by the quench area?

 

Reza, how did the other bearings look? how many miles are on the motor... where u under load? high rpm??

i dont think it was valve

 

how many r's were you turning when it blew. i had similar damage on my old gsr motor. cylinder one failed for me at 5,000rpm. my head damage was worse than yours but i didn't break a rod. i believe mine was due to a dropped valve.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by S@nt0s &raquo;</TD></TR><TR><TD CLASS="quote">Reza, how did the other bearings look? how many miles are on the motor... where u under load? high rpm??

i dont think it was valve </TD></TR></TABLE>

I was at buttonwillow on the big right turn called riverside , going close to a 100mph at 8500 rpm's. The motor just popped ..

I think the ctr pulley was working the oil pump a little to much causing it to fail.
Maybe one of the reasons why people run the TODA gear for the oil pump.

The valve probably broke due to the piston debris causing it to snap , I still have the stem of the valve and it's bent up in a s shape. Implying that something smacked it upwards.

I had a mugen baffled pan on , installed brand new two days before. I'll try and get some pics of the crank and other bearings when I take the rods off.

 

this is something I should have installed.




Exclusively from TODA Racing. Reduces chance of oil pump failure during high rpm racing conditions. Popular in the Japanese N1 and N+ endurance racing series where TODA Racing is an engine supplier. The oil pump is the heart of the engine, so when modifications are carried out the oil pump should not be overlooked. Improved oil circulation helps prevent modified engines from incurring expensive rebuilds.
$250.00USD

if you guys don't have this buy it.

 

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

I was at buttonwillow on the big right turn called riverside , going close to a 100mph at 8500 rpm's. The motor just popped ..

I think the ctr pulley was working the oil pump a little to much causing it to fail.
Maybe one of the reasons why people run the TODA gear for the oil pump.

The valve probably broke due to the piston debris causing it to snap , I still have the stem of the valve and it's bent up in a s shape. Implying that something smacked it upwards.

I had a mugen baffled pan on , installed brand new two days before. I'll try and get some pics of the crank and other bearings when I take the rods off.</TD></TR></TABLE>

Reza i think i would agree to say that the pump is what failed... thats y i asked how the other bearings looked.
i can say i think it was your pump..

 

yeah I'm thinking the same thing bro...

I don't think im going to run a ctr pulley with a stock gear for the oil pump next time..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Reza^ &raquo;</TD></TR><TR><TD CLASS="quote">yeah I'm thinking the same thing bro...

I don't think im going to run a ctr pulley with a stock gear for the oil pump next time..</TD></TR></TABLE>

i have never ran them i stick to the standard 3 row pulley

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by S@nt0s &raquo;</TD></TR><TR><TD CLASS="quote">

i have never ran them i stick to the standard 3 row pulley</TD></TR></TABLE>



lesson learned.. big time...

 

those bearings do not look that starved from oil

 

bearings looked to have sufferd a bit of pinging, and that could've weakend alot of components in the long run..?

and sum debri imbedded to it, however the debri could have come from the aftermath so not sur about that

however the piston pin is still usable? lol hehe jus playin.. sorry to hear bout this, losing a motor always FTL

 

i would say the rod broke first and caused the rest of the carnage. and those bearing don't look like they were starved of oil

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by d15Beta &raquo;</TD></TR><TR><TD CLASS="quote">bearings looked to have sufferd a bit of pinging, </TD></TR></TABLE>
Detonation does not usually show up on the main bearings. Are there some pics of the rod bearings that I may be missing?

 

ill try and get the block out today and remove the rods..

im curious as well.

 

lol.. good point...

lets see sum rod bearings...

but im wondering.. how or what caused those round stuffs on the mains.. those pimple kinda stuffs then? i see them in some motors when opening them up.. i always thought ping/deto but yeah b19 touched a good point.. mains dont usually show signs of ping

 

DAMN!