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Old 03-10-2012, 03:54 PM   #1
Steve
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Default Anyone want to help me ID this noise? (Videos)

Here are the videos:
1994 Camaro LT1 Rattle 1 of 2 - YouTube

1994 Camaro LT1 Rattle 2 of 2 - YouTube

1994 Z28 LT1 Automagic

I bought the car about 6 months ago. Since then, I've replaced the optispark. During that, I removed the flywheel/torque converter cover and jammed a screwdriver in there to keep the engine from spinning while I removed the balancer retaining bolt.

I put the cover back, and it was a bit loose, which I'm fixing today. I originally thought it was an exhaust rattle. I pulled the drivers side manifold off to replace the bolts with studs and reseal it, during which I dropped a socket and spark plug down the pipe (I know I know). In my impatience, I cut the cross pipe, pulled out what I dropped with a magnet, and patched it up with a couple of clamps and a coupler. You can see that in the 2nd video.

I'm confident my exhaust pipes aren't hitting anything. It is possible that the sound is coming from the cat, but I fear that there is a problem in the flywheel/torque converter area. I did notice a small metal sliver in the flywheel/converter cover when I removed it.

The noise you hear in the video is mild. Recently I started hearing some real banging around. It sounded like a loose fan shroud hitting a fan, but that wasn't the case here.

Anyone have any thoughts on this? I'm thinking maybe the starter isn't pulling back properly, the catalytic converter is jacked, or there's a serious flywheel/converter issue (I hope not!).
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Old 03-10-2012, 04:34 PM   #2
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Its the untra-rare Z28 CRD!
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Old 03-10-2012, 08:59 PM   #3
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I know on some of the motors it's not completely unheard of for the bolts holding the TC to the flywheel to come loose and create a gawdawful knocking sound.

That said, I have no idea what is causing your issues.
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Old 03-10-2012, 10:09 PM   #4
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You nailed it!

So, I got in there and saw this:


Yeah ok that's bad but fixable, then I turned the assembly and saw this:


There's supposed to be a bolt there!

3rd location also has no bolt.

So it turns out the only thing holding the flywheel to the torque converter was this!!


I went out and bought some M10-1.50 x 20mm class 10.9 bolts from o'reilly's. 2 of the three go right in, the 3rd is stripped to hell. Great!

Hopefully I don't have to pull the trans and change the torque converter out, although a high stall yank is on my wish list.

I'll tackle it again tomorrow or next weekend. I'm considering limping it to/from work on two bolts, haven't decided yet.
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Old 03-10-2012, 10:23 PM   #5
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Steve, I dont think I ever congratulated you on the purchase of your new car. How rude of me.

Congrats, dude. Hope you enjoy your Camaro.
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Old 03-10-2012, 10:29 PM   #6
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'79 C3 Corvette - 350/4-speed, Double Pumper 650, Super Vic Intake, Headers, Supertrapps, VB&P Street & Slalom Suspension.
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Old 03-11-2012, 07:15 AM   #7
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Glad you got it figured out. Hopefully you don't need to pull the motor and/or tranny just over a single bolt that needs to be replaced!
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Old 03-19-2012, 01:13 AM   #8
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update

flywheel appears to be bent. still hits the cover intermittently depending on how its driven, really annoying and scary sounds

i ordered a new one, along with a 3200 rpm stall converter

transmission comes out next weekend. i was going to pull it today, but came down with some BS cough cold crap that made me not want to do a damn thing

i can't wait to drive it around with the 3200 rpm stall, though!
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