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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 03-26-2012, 10:43 PM   #1
PewterPredator
 
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LSX 454 Build: NEED HELP!

Okay, i have a 2010 2SS Camaro 6-speed car.. I recently purchased a LSX 454 through GM, when i purchased the motor i asked about a clutch.. They recommended the LSA clutch, i purchased the clutch and flywheel.. I went to put the motor in my car today and when i would get the motor and transmission lined up i would have around a 3/4 in gap, My bad judgement thinking the clutch "would" work on the car i started bell housing bolts, started tightening the bolt in sequence so i didn't crack the bell housing, i suddenly herd a pop.. Looked down and there was so much tension on the motor it cracked the side of the block on the passenger side.. I pulled the motor back out and measured the factory clutch and there is about 3/4's of inch in the center which was what i was lacking with getting the motor in the first time.. Has anyone had any problems with trying to get a LSA clutch to work? Pictures below of what im talking about with the 3/4in... Thanks for your help, i hope the warranty i purchased through GM with the motor will cover what happend..

1st picture: Stock LS3 Clutch
2nd picture: LSA clutch

The difference is pretty obvious...

Billy
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Old 03-27-2012, 01:12 AM   #2
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I used an aftermarket clutch and flywheel, it's custom and the shop ordered it so I don't know what the size is. Hope you can figure it out, you will love the motor
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Old 03-27-2012, 01:20 AM   #3
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oh and usually the LSX shares parts with the LS7 so I wouldn't be surprised if it should be the LS7 clutch insted
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Old 03-27-2012, 05:59 AM   #4
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Old 03-27-2012, 08:31 AM   #5
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Was your block spoiled?????

That sucks to be that close and then have to pull it out again.
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Old 03-27-2012, 08:51 AM   #6
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Did you use a pilot shaft to line up the clutch first?
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Old 03-27-2012, 09:44 AM   #7
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Did you use the correct pilot bearing? There is two different ones. Depending on how far the input shaft sticks out beyond the trans bellhousing.

Put a straight edge across the bellhousing, how many mm's does the input shaft stick out? The GMPP catalog shows which bearing to use depending on that measurement. And a clutch alignment tool or old pilot shaft must be used to line everything up before tightening the pressure plate as mentioned before.

Count your input shaft splines too. Making sure the clutch assembly has the same splines as
the trans. Or slide it on the trans. Just make sure you don't have a 31 spline clutch and a 26 spline trans.
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Old 03-27-2012, 01:44 PM   #8
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Looking closer at the pics, the splines look the same. So I'd be leaning toward either the wrong pilot bearing, or the clutch assembly wasn't lined up with a spare input shaft or alignment tool.

The input shaft measurement will show which pilot bearing it needs. You could also try a test fit of the trans against the block without the clutch/pressure plate in place. It should slide easily on the dowels right against the block. Should never have to draw it in hard with the bolts. And a test fit of the clutch/pressure plate over the trans input shaft.

Any witness marks on the input shaft or pilot bearing that might be showing something was bottomed out?
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Old 03-27-2012, 04:03 PM   #9
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And for everyone else. Never ever ever ever use the bell housing bolts to tighten the tranny onto the block. It should slide in by hand an with a little jiggling pop on with zero clearance between bell housing and block. If it doesn't, there is something wrong. Take it back off and check.
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Old 03-27-2012, 04:09 PM   #10
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And for everyone else. Never ever ever ever use the bell housing bolts to tighten the tranny onto the block. It should slide in by hand an with a little jiggling pop on with zero clearance between bell housing and block. If it doesn't, there is something wrong. Take it back off and check.


Hope you get it figured out
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Old 03-27-2012, 04:56 PM   #11
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Well after doing some research, most of you guys are right... The LSA pilot bearing is completely different than the LS3 pilot bearing, so i got with my buddy today that works at a GM dealer and is working on getting GM to warranty the motor since they said the LSA clutch would work with the LS3 transmission, but bad news is if they do not warranty the motor then looks like im gonna have to get another block, it cracked on the driver side of the block right about the dow pin, unfortunantly the crack does going into the rear main so im assuming the block is trash.. Thanks for all you guys help, will keep updated on the way GM handels the situation!

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Old 03-27-2012, 05:04 PM   #12
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Quick picture of the crack
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Old 03-27-2012, 05:22 PM   #13
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Is there a bearing retainer on the transmission? If so, is that where it hit because I notice a nick on the pressure plate where it looks like it bound on.
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Old 03-27-2012, 05:49 PM   #14
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That picture is all blurry through my tears.
I would look into getting that ear tig welded back on. May be a possibility.
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Old 03-27-2012, 09:13 PM   #15
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Thanks Tim. Billy, if you would like, shoot me a pm and I'll get you my number. Can call me anytime and I can email or explain some measurement instructions to check for proper clutch alignment and bearing clearances. The way that block is fractured I hate to say it, but I'm pretty sure that one is a gonner. I'm in the middle of putting a 454 in our camaro now and have done GM crate lsx454s in these cars before.
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Old 03-27-2012, 09:37 PM   #16
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Yah man i'll def get with you on a clutch when i get this thing figured out.. I have to agree the block is pretty much trashed, there's a metal "shim" like piece on the snout of the transmission shaft that holds the slave and everything back im assuming.. Anyways thats what the center of the pressure plate of the LSA clutch was hitting not letting it slide all the way back on the motor.. I should of done more research on it before threw it on a 10k motor and went to put it in my car, but coming from the head guys at GM i figured there would be nothing to worry about.. They are being pretty cool about the whole situation so i'll try to keep ya'll updated on what happens.. Thanks for all ya'lls help unfortunatly im gonna be known as the guy who broke the block on a brand new LSX haha

Thanks,
Billy
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