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Blew up my engine today!

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Old 08-11-2010, 03:40 PM
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Thumbs down Blew up my engine today!

Installed a fast 90 yesterday.Today, I decided to take the car around the block to try and diag a sticking throttle. About 500 yards later I felt somthing slip and instant knocking!!! FML!!!!

The car was running great untill about 5 mins ago! I guess its better it popped before I installed the H/C that have been sitting in my closet for the past 4 months. I don't have the money to fix this POS so it will prob rot in the driveway for a while.




102107 miles..... R.I.P.
Old 08-11-2010, 04:18 PM
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Did you ever tune it after installing the fast?
Old 08-11-2010, 05:12 PM
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wanna sell it?
Old 08-11-2010, 06:08 PM
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everything always has a price! Shoot me a reasonable offer.

installed: Slp longtubes, slp dual dual w/cut out, SLP Air lid , Slp Bellow, Slp 3pt subframe connectors, Umi non adj torque arm, Umi Panhard and control arms, 18x10.5, 18x9 C6 Zo6 DD rims with Nitto Invo 275x35x18 295x35x18 less than 100 miles on tires and rims. Fast 90mm w NW 90mm throttle body. Trans Am power seats, Ipod hook up in OEM radio, Harlan shift light in A-pillar etc......

All Parts uninstalled: Brand new prc 2.5 5.3's w/ .650 lift springs and titanium retainers, New comp cam 236/236 .601 .601 114+2 lsa cam, New Arp Headbolts, Slp UDP, New Crane Lifters

Christ I spent alot of money over 5 years!
Old 08-11-2010, 06:19 PM
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That's a bummer... Best of luck with your rebuild.
Old 08-11-2010, 08:10 PM
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anyone know if the 5.3's will work on a 6.0?
Old 08-11-2010, 09:14 PM
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sucks to hear, but i have got to ask, why pull the intake manifold off the car and NOT install the heads at the same time?
Old 08-11-2010, 10:15 PM
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Sorry to hear that man, good luck on the rebuild and look forward to reading about it!
Old 08-12-2010, 05:56 AM
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its that damn FAST 90 set up.......curse it....wanna sell it? sux bro, been there in 2007. Good luck, keep us posted which route you go
Old 08-12-2010, 07:41 AM
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Sorry to hear that. Looks like with 102K on the clock it was just its time to go

Originally Posted by itsslow98
sucks to hear, but i have got to ask, why pull the intake manifold off the car and NOT install the heads at the same time?
Maybe because an intake swap takes an hour and swaping heads takes a day or two to do right, measure, check clearences and so forth.
Old 08-12-2010, 08:19 AM
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Yea, heads do take some more time, some goofy ground straps you gotta make sure are in place. Plus un bolting the exhaust. MOST times its the exhaust and spark plugs that take the most time getting back in place. Older LS1's (01 and back I think) have messy gaskets which need to be cleaned correctly and al bolt holes need to be CLEAN!!

Most people also need to ensure proper valve train geometery and if the head has been decked often the push rod is off and until you measure you may have to order a new set.

On a side note I recently I did a Fast Ported 90/90 back to LS6 swap and I got a vaccume line (for the HVAC) pinched hardcore and I had to repull and fix. I had the intake off and on with in 20 minutes, a new PB and no broken Oil Press. Sensor!!
Old 08-12-2010, 09:06 AM
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Yeah the intake swap was a walk in the park. I read enough walk throughs not to break the oil pressure sending unit. I am going to pull a head with in the next week or so. All the noise is coming from passanger side head. I would love to think it's just a dropped valve but I prob lost a piston with my luck.

I feel comfortable pulling a head now. Can't really mess it up anymore!
Old 08-12-2010, 10:32 AM
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Just curious did you beat on this engine alot? I'm at 122K and I plan on rebuilding at some point in the future, I don't have the funds yet, what causes an engine to blow at 102K miles?

Last edited by mike171562; 08-12-2010 at 10:41 AM.
Old 08-12-2010, 10:54 AM
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Valve Spring failures can happen at any time, hell at idle a spring can fail or a valve drops, it does not need to be @ Redline WOT driving.
Old 08-12-2010, 12:26 PM
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If your lucky a rocker just decided to spit out the needle bearings.
Good news is that good LS1 shortblocks only seem to be selling for around $500.
Old 08-12-2010, 01:31 PM
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Originally Posted by mike171562
Just curious did you beat on this engine alot? I'm at 122K and I plan on rebuilding at some point in the future, I don't have the funds yet, what causes an engine to blow at 102K miles?
I drove it like a sports car if thats what your asking! I wouldn't say I beat the **** out of the car. Prob only had it to 6k maybe 5 or 6 times the past 3 months. I will take some carnage pics Asap. I'll prob take the intake off again Friday and work on pulling the valve cover this weekend
Old 08-12-2010, 02:15 PM
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Originally Posted by BlackScreaminMachine

On a side note I recently I did a Fast Ported 90/90 back to LS6 swap and I got a vaccume line (for the HVAC) pinched hardcore and I had to repull and fix. I had the intake off and on with in 20 minutes, a new PB and no broken Oil Press. Sensor!!

Im down to 22:31 last time.

Installed a couple gauges, Oil Temp, Oil Press, and Water Temp. The Temp gauges were a walk int he park, but I al trying to keep the factory and aftermarket pressure gauges running at the same times. Requires quite a bit of plumbing...

Put the intake back on, factory gauge reading MAX Psi... WTF. Factory gauge is 1-wire... no ground.

Okay, pull the intake drill a small hole, tap, intall a ground on the factory sending unit. Put intake back on, fire it up... factory gauge reading 0psi. All of a sudden... smoke from under the hood. Factory sending unit leaking... FROM THE PLUG!!!!!

Pull the intake off again, waiting for new sending unit in the mail from GM Parts Direct

Intake off/on/off/on/off in one week.... I can do it with my eyes closed!
Old 08-12-2010, 02:48 PM
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if only it were a SS Id be soo interested in buying it
Old 08-12-2010, 03:52 PM
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Originally Posted by CamaroSS621
if only it were a SS Id be soo interested in buying it
Well it looks like one anyway, SS hood and spoiler. thats an old pic in his sig.

Steve dont go selling it now, you were so close. you got real lucky it went now rather then holding out another month, that would have sucked. let me know what you find out.
Old 08-12-2010, 08:44 PM
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spun a rod.... boosted 6.0 or high comp 5.7? ****'s weak!



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