Spun Bearing?????
Thread Starter
Instructor
Joined: Mar 2008
Posts: 232
Likes: 2
From: Sacramento CA
Spun Bearing?????
Well, I got my first Vette a few months ago and shortly after got some knocking at 1,500 rpm and up. Knocking speed increases as engine speed increases.
Here are some vids I took-- let me know what u guys think?????
http://video.cardomain.com/Clip.aspx...D471F42217C198
http://video.cardomain.com/Clip.aspx...875E189C65B411
My question here is:
1. Can I drop the oil pan/crank with the engne in the car to change the main/rod bearings?
2. Can a cam swap be performed without pulling the engine?
If possible, can you guys point me in the right direction for some general guidance? TIA
Here are some vids I took-- let me know what u guys think?????
http://video.cardomain.com/Clip.aspx...D471F42217C198
http://video.cardomain.com/Clip.aspx...875E189C65B411
My question here is:
1. Can I drop the oil pan/crank with the engne in the car to change the main/rod bearings?
2. Can a cam swap be performed without pulling the engine?
If possible, can you guys point me in the right direction for some general guidance? TIA
Last edited by Choose1; Jan 17, 2009 at 02:33 AM. Reason: Videos added
Melting Slicks
Joined: May 2005
Posts: 3,394
Likes: 12
From: Leon Iowa
St. Jude Donor '06-'07-'08-'09
Not sure about getting the pan off but yes you can do a cam swap in the car. You need to make a video or soundclip of what the engine sounds like and post it so we can hear it.
Le Mans Master
Joined: Jun 2006
Posts: 6,979
Likes: 31
From: Wichita KS
IF it is a rod bearing that spun then your best bet is to pull the motor or get another motor, the crank in most cases will need to be turned and oversized bearings used. If it is a rod knock and I were you I would go with at least a 383. Good luck, hopefully its not the lower end 
Racer
Joined: Jan 2006
Posts: 415
Likes: 1
From: Ft. Wayne In
Take off the oil filter.Cut it open,most auto parts places will lend the tool,and look for gold colored particles in the pleats.If you've spun a bearing,it's time to pull the motor.
You can change cams with the motor in the car. http://www.ls1howto.com/index.php?category=0
You can change cams with the motor in the car. http://www.ls1howto.com/index.php?category=0
Thread Starter
Instructor
Joined: Mar 2008
Posts: 232
Likes: 2
From: Sacramento CA
E-mail video clip.....
I'll open up that oil filter as soon as I get home next week. I have a couple video clips on my portable drive with me but can not open them and do not know how to post them. I can try sending them via email to anyone willing to check it out. Meanwhile, I'll try to figure out how to post them. I was hoping it was a sticky lifter but sounds a lil low to me. Thanks for the input, everything helps...
Drifting
Joined: Sep 2006
Posts: 1,757
Likes: 13
From: Stillman Valley Illinois
Well to answer your first 2 questions, You can swap the cam in the car. You can probably get at the crank with the block in the car by using an engine hoist to support the engine, and dropping the cradle, but if you are going to go through all of that; why not just pull it and do it right?
What if anything were you doing right before it started? manual or auto? post up an audio file so we can hear it.
What if anything were you doing right before it started? manual or auto? post up an audio file so we can hear it.
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Thread Starter
Instructor
Joined: Mar 2008
Posts: 232
Likes: 2
From: Sacramento CA
Video Upload---------
I was on it pretty hard right out of my driveway for about 1/8th a mile, by the end of the block I heard this noise.....
Lets see if these vid links work....
http://video.cardomain.com/Clip.aspx...D471F42217C198
http://video.cardomain.com/Clip.aspx...875E189C65B411
My Car:
98 C5 Convert
LS1 / M6
Stock
Lets see if these vid links work....
http://video.cardomain.com/Clip.aspx...D471F42217C198
http://video.cardomain.com/Clip.aspx...875E189C65B411
My Car:
98 C5 Convert
LS1 / M6
Stock
Instructor
Joined: May 2004
Posts: 133
Likes: 0
From: Columbia MO
Is your car a 6 speed? If so
ut siunds like pi;ot bearing. Try to isolate where the noise is coming from. My pilot was quite when cold but, soon got noisy. Does it make the noise when in gear and driving?
Drifting
Joined: Jan 2004
Posts: 1,419
Likes: 6
From: Alamosa CO
Hate to say it, but it sure sounds like a rod bearing to me. Drain the oil and cut the filter open like stated in an earlier post, that'll tell you for sure what's going on. I just went through the same thing! 
Car was down for 2 months waiting for the shortblock to get re-done.
Just finished putting it back together a week ago and now breaking in the re-done short block. Good luck. Look at the bright side, now might be a good time to put a stroker in there!
Jimbo
Car was down for 2 months waiting for the shortblock to get re-done.
Just finished putting it back together a week ago and now breaking in the re-done short block. Good luck. Look at the bright side, now might be a good time to put a stroker in there!
Jimbo
Melting Slicks
Joined: Dec 2003
Posts: 3,315
Likes: 17
From: Near Jacksonville Fl.
Sure sounds like a rod to me.
The way to tell for sure is to let it idle and pull off plug wires one at a time, when you find the one that make the noise go away that will be the culprit.
The way to tell for sure is to let it idle and pull off plug wires one at a time, when you find the one that make the noise go away that will be the culprit.
Thread Starter
Instructor
Joined: Mar 2008
Posts: 232
Likes: 2
From: Sacramento CA
OUCH!!!!! A bad Rod Bearing....
1. Will I need to get the crank turned?
2. Do I have to change the rod?
Digmo: Makes noise sitting in nuetral as well as while in gear and driving.
Thanks for all the help and good input. Maybe I'll start researching those "strokers"-$$$
1. Will I need to get the crank turned?
2. Do I have to change the rod?
Digmo: Makes noise sitting in nuetral as well as while in gear and driving.
Thanks for all the help and good input. Maybe I'll start researching those "strokers"-$$$
Le Mans Master
Joined: Feb 2002
Posts: 6,937
Likes: 21
From: Waldorf MD
Tech Contributor
Joined: Jan 2007
Posts: 19,493
Likes: 1,178
From: Dyer, IN
Not trying to give you a hard time, but just by the questions you are asking, tells me you need to get the car to a qualified mechanic.....