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Old 11-05-2005, 10:17 PM   #111
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hrmmmm..... is that a bad thing?


lol, nice to see she is coming together andrew. hope she is on the road soon
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Old 11-05-2005, 10:46 PM   #112
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I don't know who agrees with me, but if I were to diagnose that engine, I would have said that the spring failed. the valve retainer dropped off, then the valve dropped into the cyliner area. Causeing the piston to crack and let go to the connecting rod.

But i'm untrianed and that'* just my guess
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Old 11-06-2005, 01:07 AM   #113
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**** definately went seriously wrong.
Good to see ya got a motor and will be up and running in no time.
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Old 11-06-2005, 01:47 AM   #114
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gawd damn! ton of work....



mmm, like the pics, w/ the swoops on the 95
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Old 11-06-2005, 02:10 AM   #115
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Quote:
Originally Posted by corvettecrazy
I don't know who agrees with me, but if I were to diagnose that engine, I would have said that the spring failed. the valve retainer dropped off, then the valve dropped into the cyliner area. Causeing the piston to crack and let go to the connecting rod.

But i'm untrianed and that'* just my guess
thats exactly what my dad said, and thats why he was unsure about the cam, even thuogh zzp says its can be for stock heads, but he thinks the spring was overly compressed and the wear broke it down..

also, the head gaskets looks to be about 1mm or more thick, way to much...prolly the old ones from the aftermarket heads... could the gaskets have a play in the ammount of compression the spring was getting?

there is no plans right now of putting the cam in the new motor... because everything works on it right now, and im not gonna mess with perfection... I JUST WANNA DRIVE IT!!! i dont care if it was running on 1 cylinder...
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Old 11-06-2005, 07:55 AM   #116
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Quote:
Originally Posted by corvettecrazy
I don't know who agrees with me, but if I were to diagnose that engine, I would have said that the spring failed. the valve retainer dropped off, then the valve dropped into the cyliner area. Causeing the piston to crack and let go to the connecting rod.

But i'm untrianed and that'* just my guess
thats what i was thinkin too.
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Old 11-06-2005, 08:34 AM   #117
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Quote:
also, the head gaskets looks to be about 1mm or more thick, way to much...prolly the old ones from the aftermarket heads... could the gaskets have a play in the ammount of compression the spring was getting?
Those are MLS 4 layer gaskets, they are stock height and are every bit as thick as a stock gasket is.

After looking at the pictures, I would go along with the new theory that the spring gave out and it didn't die from KR.

I had the pcm recoded to a lower shift point, it does not go over ~5800, or at least it shouldn't. I did this because I knew it would be running stock springs again. Now, if I had left it at 6400, I would expect a spring failure, because I did not, I didn't even think it would be an issue as it'* LOWER than DHP set'* their pcm'* for 1.9 rockers and stock springs (roughly same lift, duration and overlap is changed on the cam though). So seeing this, I am even more proud of that motor than I ever was.. it took the beating from the 3.1 and never had a problem.. seems a mechanical failure did it in.

Just a side note, the bonne ballancer IS different however isn't required. The GTP balancer will work just fine with that motor. The coil bracket is also different... and the coils on the bonne motor only have 30,000 miles on them, they were new off an 04' from Ed Morad.. use em along with the coil plate they sit on if you can.. same with the plug wires, new 04'* from 30,000 ago.

I forgot about the exhaust manifold being different, sorry.. the outlet port is moved to the side to mate with the exhaust.

I would start off with the 3.8, remembering this is a custom pcm. I had the timing moved back to stock tables also, so you should see nothing over 16/17. I would run it with the 3.8 to start off and get some scans done to make sure she is coo before giving more bewst.

I feel sad, but also releived that a spring failure caused this mess... I felt sooooo sooooo bad for having that 3.1 on there and thought it did the motor in... at least this ended up being something that was out of everyones control as nobody knows when a spring could fail, specially with lower shifts. I am still horribly sorry this all went down.... but... you will know that car inside and out now eh?

One last thing, I would think about keeping the aluminum dog bone plate that the GTP motor has for a motor mount, the one that is at the back of the engine on the front side, where it mates to the trans.... I would see if you can find a way to use that to add an extra motor mount to the system on the top... the little doughnut mounts the bonne uses now fail so easily, this is a good chance to have a way to build a stronger mount on top.

At any rate, keep us posted! That is some impressive carnage... and I can honestly say you can't blame yourself for beating on it on the way home... that had nothing to do with a spring failing.

-Adam
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Old 11-06-2005, 08:38 AM   #118
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To slightly expand on the ballancer comment... I still suggest using the SSEi Balancer on the new motor, it is lighter and is better ballanced (luxury car thang.. they are GOLD on clubgp.com...) just saying if it isn't done RIGHT now you will not be hurting.

Did you change over the throttle body instrumentation?
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Old 11-06-2005, 08:44 AM   #119
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Yet another comment.. looking at the pics I see the rod didn't actually break at all.. thus.. I bet that cam is still in GOOD condition. I understand not wanting to run it right away but I definately suggest getting it out of there and hanging onto it.. if it IS in good condition it can get ~$200 on clubgp.com and help recoup some cost.

Just a thought...
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Old 11-06-2005, 10:56 AM   #120
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Taking a moment to look over the head, valve guide area and whatnot.

The pic where Andrew says you can see the "cam" I believe he meant "crankshaft", unless there'* something there I can't see in the pic.

Caminated, the lifter was fairly bent. When you say the rod wasn't broken therefore the cam should be ok. Can you elaborate as to why the rod should effect the cam instead of the lifter? My thoughts would be that the lifter rides the cam and if there was any problem it might be slightly grooved from bending the lifter. Although lifters are usually easily bent and don't hurt a cam.

I'd like to condem the spring or retainer clips as well. None of which would ever need to be messed with in a stock head reinstall.

Learning from this, we should say that changing springs when doing rockers or a cam is highly suggested as the springs we'd put on would be higher quality and better overall than stock springs.
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