think i spun a bearing!!!

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Mar 17, 2002 | 08:07 PM

pegasisbd

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think i spun a bearing!!!

Ok Im new to the scene here so please dont flame me. Dunno what happened. I was runnin my '93 TA kinda hard and all the sudden it started knockin. Had a few people tell me it was a rod but i pulled all the plug wires one at a time to see if it would stop but it didnt. Is this a reliable test?? What all will have to be replaced if i did spin a bearing? Thanks for helpin the newbie. I <img border="0" title="" alt="[Sad]" src="gr_sad.gif" /> ts greatly appreciated.

Mar 17, 2002 | 08:19 PM

Big Gulp Johnson

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From: houston

Re: think i spun a bearing!!!

I just took apart a motor with a spun bearing. I didn't hear the motor running, but was told it sounded like a bent pushrod, so I'm assuming there is a bad knock. Anyway, there is a bearing that connects the rods to the crank. The bearings look like half-circles and there are two per rod. When a bearing is "spun," one half of the bearing rolls over on the other. By the looks of this motor, it was run quite a bit after it happened because the crank was ground down and scratched up pretty bad. Not sure how the LT1's respond to over-reving, but I do know for a fact (unfortunately) that LS1's are prone to bent pushrods. Could have floated the valves, hit a valve against a piston head...could be a lot of things. Hope I at least helped to define the spun bearing, unfortunately your description could be one of many things. Did you miss a shift?? Over-rev?? Good luck to you!

Mar 17, 2002 | 09:25 PM

pegasisbd

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Re: think i spun a bearing!!!

I didnt even run it out to redline. Thats what gets me. Its got 91k on it. Thought it might have been a valve or pushrod also but from what I can tell its louder from under the car and its toward the rear of the motor. I just had the tranny out putting in a new clutch. It could be something back there but it sounds more like its on the inside.

Mar 17, 2002 | 09:45 PM

Jimmy98Z

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From: Plano TX

Re: think i spun a bearing!!!

Since your motor has so many miles on it i would get like a little bit of a bigger motor and some new heads and new cam well if you have the means to do so. A place you might wanna check out is ARE http://www.agostino-racing.com/ or MTI http://www.motorsporttech.com/ They have some good LT1 stuff.
Jimmy <img border="0" alt="[Chevrolet]" title="" src="graemlins/camaro.gif" />

Mar 17, 2002 | 09:57 PM

pegasisbd

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Re: think i spun a bearing!!!

Thats the thing. I had test drove a 98 z28 the day before this happened. Ive already had so much trouble outta this car I dont wanna put anymore money into it. Does anyone know of any quick fixes so I can get the car traded?

Mar 17, 2002 | 10:22 PM

MelloYellow

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From: Centrifugal City

Re: think i spun a bearing!!!

Thicker 50W oil might quiet it down? Then trade it in? Otherwise you are looking at a rebuild. Keep the RPM's down low or you'll throw a rod thru the block.

Mar 17, 2002 | 10:27 PM

pegasisbd

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Re: think i spun a bearing!!!

Just put in VR1 Racing 50W today. Made it a lil quieter, not enough though. Any other tricks??? What would it take to fix it with the least money possible??? Thanks for all of the quick responses. I need to get this thing traded for the LS1.