LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

NASTY sound...like marbles in the intake, TAKE A LISTEN, Help please!

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Old 04-06-2003, 07:33 PM
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looks like quite a bit of shavings in therE?
You most likely spun one of the bearing..if not all of em
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Old 04-06-2003, 07:49 PM
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Red face

My money is on a spun bearing too...I spun a bearing in my old Cavalier, and it sounded similar to that. I hope for your sake that isn't it though.
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Old 04-06-2003, 07:59 PM
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Pulled them out, wiped em off, pushed in all the cups w/ a pushrod, the 8 or so I pressed, non compressed...

Is it possible to collapse that many lifters?!?

I noticed that while upside down, some leaked some oil, some didn't.
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Old 04-06-2003, 08:26 PM
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Originally posted by xxsaint69x
looks like quite a bit of shavings in therE?
You most likely spun one of the bearing..if not all of em
I agree...time for a rebuild. Mine did the same thing a couple of weeks ago...started knocking and rattling, lack of power, low oil pressure. We cut my oil filter open and discovered that the majority of the main bearings had made themselves a new home in the bottom of the filter. Nothing you can do but tear it down and hope that everything is still in fairly good condition.
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Old 04-06-2003, 10:32 PM
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I pulled out the Oil Filter and drained that...doesn't look very good in there....











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Old 04-06-2003, 10:48 PM
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I would say that something had been going on over time. Whatever was causing the shavings finally clogged up enough oil passaged to cause starvation to the bearings. A complete tear down and clean up is in order unless you just want to find a salvage yard engine to throw in it for your "driver". You might be surprised how cheap you could find one.
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Old 04-06-2003, 10:51 PM
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Originally posted by shoebox
I would say that something had been going on over time. Whatever was causing the shavings finally clogged up enough oil passaged to cause starvation to the bearings. A complete tear down and clean up is in order unless you just want to find a salvage yard engine to throw in it for your "driver". You might be surprised how cheap you could find one.
yep, i can pick up an LT1 from an impala/caprice for only $500.. that is the entire thing including pcm. might be worth checking out if you can find a low mileage one.
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Old 04-06-2003, 11:09 PM
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http://paradox.shacknet.nu/dave88lx/...a/knock/16.jpg


Hey I know what that is its the milky way. O wait....
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Old 04-06-2003, 11:15 PM
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Hmmm, I think I'll try that then. Wonder what caused it?!

I'll call around to some JY's tomorrow. It's my driver, but it's also my race car until I get the mustang going

Hopefully it can still hit 13.9 after a rebuild.

I'd like to get out of this cheap as possible. Just reliable transportation. My lifters might be clogged too, I don't know. I have to see what needs replacing now.

How far can these blocks be bored over?

I'll probably get a Summit rebuild kit w/ forged pistons, some machine work, and learn how to build an engine
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Old 04-06-2003, 11:20 PM
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Originally posted by Dave88LX
Hmmm, I think I'll try that then. Wonder what caused it?!

...
It could have been abused as a child.
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Old 04-06-2003, 11:24 PM
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mine was driven by a little old lady that bought it new, she put the miles on, but laid them on nicely. You gotta love little old ladies
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Old 04-06-2003, 11:25 PM
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Hey shoebox, you just hit 8888 posts... you should take a snap shot, it won't last for long, it'll be 9,000 by tomorrow
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Old 04-06-2003, 11:46 PM
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Originally posted by scoobysnax83
mine was driven by a little old lady that bought it new, she put the miles on, but laid them on nicely. You gotta love little old ladies
the typical little old lady doesnt realize theres more to a car than turning it on, putting it in gear and pushing on the gas pedal. i wouldnt be surprised if the oil was only changed twice since she had it
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Old 04-06-2003, 11:57 PM
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Cool

You spun the farthest rear passenger side rod bearing. You will probably have to drop the crank out of it also since your gonna have some rough crank journals since those shavings have had to make their way all the way through the engine at one point and time. You can have the rods resized, the crank ground, and put it back together. Make sure to have it dipped and honed along with a new set of rings. Your looking at $600 if you were here in KY. My whole rebuild counting assembley and all head work (no porting) was $1600. Stock rods/ crank, but it's a tight lil engine that will s-c-r-e-a-m.

I had the exact same knock in mine when the oil pump was going south. It didn't even knock until I hit 1500 rpm...

-Shannon
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Old 04-07-2003, 12:02 AM
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Not doubting, but what makes you say it's the rear pass side rod bearing

I'm wondering while I have it apart how much better I can make it for CHEAP.
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