Was a sad day for me last week on way to work.

I was just enjoying the drive, not many cars on the road. I was sitting at a traffic light and waited on the green light, got the rev's up to about 2,500 rpm, slipped the clutch a little, spun the tires a bit. When tires started to bite, got into throttle till hit around 8200 then it happened...

Car fell on its face then lost power. Checked oil and it was about 3 qts over full with coolant. Had it towed to work. Pulled the plugs, #1 was only one that looked good, rest covered in coolant.

Here is link to pictures....
http://s555.photobucket.com/user/tdc...tml?sort=3&o=7





It had about 6,000 miles on it, street and track. I built it to have fun! Been down 1/8 mile 34 times (never made it to road course ) Has pulled some good numbers, so not that pissed.
(NO I did not miss shift)

Stock sleeves with block guard. Made 226hp at RLZ on 93 oct, Redline was set at 8500 and pulls (well pulled) hard.

I am guessing that the sleeve might have cracked or gave a little and caught the back of piston on the way down, wedged itself in cylinder and rod just pulled pin out the bottom. Then beat the crap out of piston, cylinder and head. (my guess).

 

wow, I knew b20 sleeves were weak, but geez

LMK if you help man I live 20 minutes from mooresville

 

Well I beat on it hard. Seen north of 8k most of the time.

 

pictures dont work

 

all the pictures say the user moved them, cant se pics. my stock sleeve stock internal b20vtec with a golden eagle block guard revs to 8400 no problem and been doing it for the past 4-5yrs and i have tons of dyno tune sessions, dyno day pulls, street tuning, street fun, and 100+passes down the track, grant it, its only making 200whp but most people to this day still tell me not to rev it that high the sleeves cant handle those r's. my tuner made 696whp revving 9-9500rpm's on stock sleeves b20vtec at 84.5mm with a golden eagle block guard and even over revved the motor on a 4 to 3 miss shift(12,500rpm+ ferrea valvetrain saved the motor), pulled head off only damage was 16 bent valves and worn guides, sleeves were still in perfect shape. my budddy made 453whp on a stock low comp b20 bottom end with a built vtec head, no block guard. i tell everyone dont be scared of the stock sleeve b20's, from my experience and from what i seen personally theres nothing to be scared about stock b20 sleeves. sorry to hear about your setup, good luck with your next build.

 

Pics don't work but what rods were used? What bolts? I'd lean more towards a rod failure given the rpm you stated over sleeve failure...

 

Even with a block guard I split the wall(s) of a b20

Sorry to here man, hope you get it back on the road asap

 

Sorry about NO pictures. I'm new to Photobucket, I will try to get fixed when I get home from work. Not good with computers!

 

that block was probably already abused or damaged when you got it.

We have several stock sleeve b20vtec's running around for very long periods of time (years) turning 9500 rpms making over 250hp.

If the block has been overheated or hydrolocked the cylinders will be more prone to breaking.

 

here are the pics:

http://s555.photobucket.com/user/tdc...?sort=3&page=1

 

I just went thru all the ^ pictures and I don't see how the sleeves were to blame on this happening. perhaps if the sleeves would've failed(cacked) you would've have loss compression and such bla,bla,bla, but this is just a carnage, I'm sorry for your loss...

 

I did get block used off guy that road raced with it.

Thanks for info!

I'm learning!!!

 

It ran great on way to work, stopped at light, took off (still fine), got revs up around 8200 then felt jerking and fell flat. That's the best I could tell ya.

Trying to get back on road. One part at a time to build up a little better.

thanks!

 

Damn man that sucks, it's always hit or miss with stock sleeves on b20, my friend has a 280hp b20v 84.5 stock sleeves and he revs out to 10,400 and hasn't had issues yet, good luck with rebuild.

 

Thank you for your help!

 

yeah that wasn't the sleeves that caused your failure. It looks like the piston fell apart first.

 

Man it looks like you got lucky. It couldve been a lot worse from the looks of it. Is it just me, or does it look like the sleeves are warped/shifted? Cause that block guard looks funky in there. Instead of throwing a rod it looks like you threw a piston. Shattered at the wrist pin probably at tdc and just hung out up there while your rod smacked around a bit. I think the wrist pin probably kept the rod from flailing around too much inside the cylinder

 

How can you be so sure it was the sleeve that failed first? What if the piston broke and the rod and wrist pin broke the walls after the fact. That is not the normal failure location for those.

 

I am "guessing" it was the sleeve that grabbed the piston. I dont know for sure. I have not heard much of a piston coming apart (pin pulling through bottom of piston).

I'm guessing about sleeve due to "lots" of issues with sleeves failing on B20's. I'm not a B20 hater, just stating what happened to mine, and what might have happend. I was very happy with it. I know stuff happends.

 

As stated above i doubt thats the sleeves fault..It's not common to break there, Wild Guess would be P2W and/or Beating it Cold.

 

Thought about that, but I always warm up before I drive. Plus just drove 15 miles, so was up to temp, good fresh oil change (30 miles ago) all fluids good.

 

hum.... weird.
what was p2w set at?

strange how it appears like piston grabbing the walls

 

Sorry, could not tell ya, Howard at RLZ put bottom end together and I trust his work. So I'm sure its good.

 

B20 sleeves aren't as weak as everyone thinks.

Nobody Fucken noticed the actual piston pin, pulled through the piston?..

Looks like some possible valve floating as well. That p2w looks weird.. the piston pic shows some good sign of wear.

 

Weak cast piston? Does not look sleeve fault to me.