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Bad night for me

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Old 09-10-2006, 10:49 AM
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Default Bad night for me

I was driving last night and decided to open my bottle to see how much pressure I had in it. I had the master switch off to the system and it shouldnt have done anything but I guess the solinoid was stuck open. it jumped u to like 3000 rpm and locked there. I pulled over and shut it off. got out and noticed the nitrous line was frosted over and could hear it still hissing. shut the bottle off and it stopped. set there for a little bit looking things over but i dont guess it was long enough. still had nitrous and fuel in the intake. tried to start it and as soon as it turned over instant fire ball. blew pieces everwere. I just hope its only the intake and the rest of the motor is ok. Im at work today, but i will get some pics posted tomarrow.

anyone of you motor guys tell me what i need to be looking for in damages when i start tearing it apart probalby tomarrow if i can get it home. luckly i have never upgraded to a ls6 intake and if thats all thats wrong this will be a good time.



Old 09-10-2006, 10:57 AM
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Holy smokes. Looks frosty! Hopefully it's just the intake.

Repair it and make it better. Good luck.
Old 09-10-2006, 11:09 AM
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ouch !!! that looks bad .hopefully you'll be o.k .
Old 09-10-2006, 11:12 AM
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If it happened at start im betting you just need an intake and some diagnonis of a nitrous issue.
Old 09-10-2006, 11:57 AM
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well i havent got it home yet, but i took the mass air and the air box off. the mass air looks to be ok, but the throtle body blade is bent all to ****.
Old 09-10-2006, 12:07 PM
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Originally Posted by ShevrolayZ28
Holy smokes. Looks frosty! Hopefully it's just the intake.

Repair it and make it better. Good luck.
the frosty look is from the fire extinguisher powder.
Old 09-10-2006, 12:59 PM
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wow...not good
Old 09-10-2006, 01:39 PM
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yes not good...let us know whats goin on thow
Old 09-10-2006, 05:13 PM
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Be glad you don't have a aluminum intake. My buddy with a LT-1 396 had something similar happen to him, but his intake held and sent the charge out the air intake. Took out the MAF, shrapnaled the cold air intake, blew off the front quarter panel, and removed half of the front bumper. Also had plastic imbedded in his fiberglass SS hood. All this happened shortly after his $5k paint job was complete. Luckily it was just after his GMHTP spread. If all you lost was the intake, your lucky.
Old 09-11-2006, 07:27 PM
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ok finally got it home today and got the intake off.

it was in a few pieces


back side

throttle body blade
Old 09-11-2006, 08:04 PM
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Holy ****! Damn. What were you thinking when that happened?

I dont even know what I would do if I heard my intake explode when I turned my key. Hopefully the bulk of us will not ever have to experience that.

Did you figure out if the rest of your motor is alright? Do a leakdown test and see if you bent any valves, but I doubt it.. since the intake relieve all of the pressure.
Old 09-11-2006, 08:09 PM
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so both noids were stuck open? that doesn't sound right.
Old 09-11-2006, 09:05 PM
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Definately do a compression and/or leak down test. Similar incident happened to a guy on the C5 board. He ended up with a cracked block.
Old 09-12-2006, 12:40 PM
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Damn that sucks! Hopefully the internals made it through alive.
A buddy of mine did that a few years ago on his LEASED cavalier. Ventilated the block and broke the crank in a couple places. He tried to warranty it
Old 09-14-2006, 12:02 PM
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ok guys need some help. we did a compretion check last night and it didnt come up good. number 4 cylinder only had 30 psi in it were all the rest were from 145 to 160. i know its eather the rings or the valves. which is more likly to go bad? I need to know were to start at and any sugjestions would be good as well.
Old 09-14-2006, 12:50 PM
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Originally Posted by 00hawk120
number 4 cylinder only had 30 psi in it were all the rest were from 145 to 160. i know its eather the rings or the valves. which is more likly to go bad?
Most likely the rings. In order to ignite the nitrous, your valves were basically closed, therefore the force of the explosion pushed against the weak LS1 ring lands. Hopefully it's only the rings and not the block.

The first step is to pull the heads and see what's up.
Old 09-14-2006, 01:07 PM
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holy poop!

I am glad I stoped running juice when I did.

Before tearing it apart... pump the cylinder full of air, listen to where the air is escaping. If you hear it in the exhaust, then u have a bent exhaust valve. If you hear it in the intake runner, then its the intake valve. If you hear it in the oil dip stick tube, its the rings.
Old 09-14-2006, 01:49 PM
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So all you did was turn the bottle on and it started to spray nitrous in the motor?
Old 09-14-2006, 02:13 PM
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Originally Posted by allthrotle
So all you did was turn the bottle on and it started to spray nitrous in the motor?
yeah i guess it was stuck open.
Old 09-14-2006, 06:37 PM
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if that ever happens again, unplug both coil harnesses under the fuel rail covers and turn the engine over for several seconds to purge out the nitrous......Sorry for the bad day!

Good luck to you!

Ray



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