Notices
C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette

Bearing material in pan, what would you do?

 
Old 12-30-2018, 04:03 PM
  #1  
randallsteel
Junior Member
Thread Starter
 
Member Since: Dec 2017
Posts: 28
Likes: 0
Received 1 Like on 1 Post
Default Bearing material in pan, what would you do?

hey guys,
i have a 1975 L48 corvette. It has 108k miles on it. I drove it yesterday and it ran great. I took the oil pan off today due to the pan gasket leaking. I found some strips of bearing material in the pan. There are 4 strips, all of them about 1/2 inch long by 1/4 inch wide. The material is easily bendable. I grabbed and shook each connecting rod and the only one I was able to get movement out of was #5. I could slide it back and forth a little. My question is what would you do if this was your Vette? It makes no knocking noise when it was running, I would have never guessed that there was some bearing damage. Iím thinking about putting the pan back on and driving it while saving some cash for a new bottom end. How long do you think the bottom end will last? I have rebuilt engines but Iíve honestly never had an engine start to go bad on me. No experience with how quickly things will go south.
On another note, I was surprised to find out I have a 4bolt main, I thought L48s came with a 2 bolt main?

thanks, Randall
randallsteel is offline  
Old 12-30-2018, 04:13 PM
  #2  
Big2Bird
CF Senior Member
 
Big2Bird's Avatar
 
Member Since: Dec 2006
Location: Anaheim Ca.
Posts: 7,027
Received 447 Likes on 418 Posts
Default

Quit while ahead. Cheaper now. If you have a clutch, might be thrust surface from rear main.
Big2Bird is offline  
Old 12-30-2018, 04:14 PM
  #3  
Vette5311
CF Senior Member
 
Vette5311's Avatar
 
Member Since: Mar 2018
Location: Golden Colorado
Posts: 1,386
Received 168 Likes on 158 Posts
Default Stop now........

The only thing that can happen with more miles is more damage. May mean the difference between being able to turn the crank or having to replace it. Or you could ruin a rod and crank and then add rebalance to the bill. Nothing good is going to happen. Never seen an engine heal itself.
Vette5311 is offline  
Old 12-30-2018, 04:41 PM
  #4  
HeadsU.P.
CF Senior Member
 
HeadsU.P.'s Avatar
 
Member Since: Aug 2017
Location: Cool Northern Michigan
Posts: 2,238
Received 401 Likes on 379 Posts
Default

Something tells me that that's not bearing material. But I don't know what it is.

If it were mine, I would start at the front of the crank and pull off a rod cap, inspect, reinstall, torque to specs, go to the next one. Write down which number cyl if you find something.

Also, run a magnet around the bottom of your pan. Any glitter? If there was truly wear & tear, there should be glitter.

Trying to think what would be 1/2" long X 1/4" wide. metal strip.

Last edited by HeadsU.P.; 12-30-2018 at 04:57 PM.
HeadsU.P. is offline  
Old 12-30-2018, 04:43 PM
  #5  
Big2Bird
CF Senior Member
 
Big2Bird's Avatar
 
Member Since: Dec 2006
Location: Anaheim Ca.
Posts: 7,027
Received 447 Likes on 418 Posts
Default

Picture is worth......
Big2Bird is offline  
Old 12-30-2018, 04:46 PM
  #6  
jackson
CF Senior Member
 
Member Since: Sep 2001
Location: Timmonsville SC
Posts: 5,324
Received 199 Likes on 187 Posts
Default

Sorry for you R
I agree with all the above.
Pull rear main cap & rod cap#5 ... find the culprit ... make certain you know where each cap came from ... keep pulling caps 'til you convince yourself it's time to make some sort of change.
jackson is offline  
Old 12-30-2018, 04:46 PM
  #7  
REELAV8R
CF Senior Member
 
REELAV8R's Avatar
 
Member Since: Apr 2011
Location: Hermosa
Posts: 4,149
Received 293 Likes on 270 Posts
Default

I would remove all the con rods and mains to inspect the bearings. If any of them is damaged/ missing chunks I would just replace them all. It will also give you a chance to inspect the mating surfaces for damage.
REELAV8R is offline  
Old 12-30-2018, 04:47 PM
  #8  
fparkin
CF Member
 
fparkin's Avatar
 
Member Since: Mar 2018
Location: Swartz Creek MI
Posts: 95
Received 8 Likes on 8 Posts
Default

I agree we need photos to see what happen

Last edited by fparkin; 12-30-2018 at 04:49 PM.
fparkin is offline  
Old 12-30-2018, 05:03 PM
  #9  
thatcorvetteguy
CF Senior Member
 
thatcorvetteguy's Avatar
 
Member Since: Jan 2010
Location: Rexburg Idaho
Posts: 693
Likes: 0
Received 8 Likes on 8 Posts
Default

Sounds to me like a thrust bearing.

Last edited by thatcorvetteguy; 12-30-2018 at 05:04 PM.
thatcorvetteguy is offline  
Old 12-30-2018, 05:12 PM
  #10  
randallsteel
Junior Member
Thread Starter
 
Member Since: Dec 2017
Posts: 28
Likes: 0
Received 1 Like on 1 Post
Default


randallsteel is offline  
Old 12-30-2018, 05:16 PM
  #11  
randallsteel
Junior Member
Thread Starter
 
Member Since: Dec 2017
Posts: 28
Likes: 0
Received 1 Like on 1 Post
Default

Thanks for the all the thoughts. I’m not a master engine builder nor do I have tons and tons of experience, but I thought that if the material is pliable and bendable then it’s bearing. I’ll take yalls advice and start pulling rod caps tomorrow and see how they look.
randallsteel is offline  
Old 12-30-2018, 05:29 PM
  #12  
Anton Chigurh
CF Senior Member
 
Member Since: Nov 2017
Location: What's the most you've ever lost on a coin toss?
Posts: 766
Received 25 Likes on 15 Posts
Default

another vote for thrust bearing
Anton Chigurh is offline  
Old 12-30-2018, 05:36 PM
  #13  
Big2Bird
CF Senior Member
 
Big2Bird's Avatar
 
Member Since: Dec 2006
Location: Anaheim Ca.
Posts: 7,027
Received 447 Likes on 418 Posts
Default

Does the car have a clutch?
Big2Bird is offline  
Old 12-30-2018, 05:45 PM
  #14  
randallsteel
Junior Member
Thread Starter
 
Member Since: Dec 2017
Posts: 28
Likes: 0
Received 1 Like on 1 Post
Default

It’s an auto, TH-400
randallsteel is offline  
Old 12-30-2018, 05:48 PM
  #15  
Big2Bird
CF Senior Member
 
Big2Bird's Avatar
 
Member Since: Dec 2006
Location: Anaheim Ca.
Posts: 7,027
Received 447 Likes on 418 Posts
Default

Just keep looking for where it came from.
Big2Bird is offline  
Old 12-30-2018, 06:02 PM
  #16  
derekderek
CF Senior Member
 
Member Since: Jul 2015
Location: Westville NJ
Posts: 5,131
Received 674 Likes on 624 Posts
Default

Replace all 8 rod bearings. Pull the main caps and check all 5 mains. If lower main shell is good, upper will be too. Post pics of any crankshaft damage.
derekderek is online now  
Old 12-30-2018, 06:45 PM
  #17  
Fredtoo
CF Senior Member
 
Member Since: Jun 2014
Posts: 264
Received 57 Likes on 48 Posts
Default

Originally Posted by randallsteel View Post
hey guys,
i have a 1975 L48 corvette. It has 108k miles on it. I drove it yesterday and it ran great. I took the oil pan off today due to the pan gasket leaking. I found some strips of bearing material in the pan. There are 4 strips, all of them about 1/2 inch long by 1/4 inch wide. The material is easily bendable. I grabbed and shook each connecting rod and the only one I was able to get movement out of was #5. I could slide it back and forth a little. My question is what would you do if this was your Vette? It makes no knocking noise when it was running, I would have never guessed that there was some bearing damage. Iím thinking about putting the pan back on and driving it while saving some cash for a new bottom end. How long do you think the bottom end will last? I have rebuilt engines but Iíve honestly never had an engine start to go bad on me. No experience with how quickly things will go south.
On another note, I was surprised to find out I have a 4bolt main, I thought L48s came with a 2 bolt main?

thanks, Randall
Back and forth in which direction?
Front of car to back of car might be OK, Right wheel to Left Wheel is a big problem,
Fredtoo is offline  
Old 12-30-2018, 06:58 PM
  #18  
HeadsU.P.
CF Senior Member
 
HeadsU.P.'s Avatar
 
Member Since: Aug 2017
Location: Cool Northern Michigan
Posts: 2,238
Received 401 Likes on 379 Posts
Default

At this point you and other posters are speculating bearing material. No parts have been removed to verify anything just yet. Your original post could have stated:

Metal material in oil pan. Any ideas?

If that material in the photo was from a bearing, I think you would have heard something. Something awful.

Last edited by HeadsU.P.; 12-30-2018 at 07:03 PM.
HeadsU.P. is offline  
Old 12-30-2018, 07:46 PM
  #19  
randallsteel
Junior Member
Thread Starter
 
Member Since: Dec 2017
Posts: 28
Likes: 0
Received 1 Like on 1 Post
Default

Heads UP, that is how I feel as well. I was very surprised to find metal in the pan because I had no indication that anything was wrong. I just assumed it was bearing material because it’s soft/pliable and non magnetic. I’m going to remove some caps and check tomorrow, but if everything looks good I wonder where that metal came from.
randallsteel is offline  
Old 12-30-2018, 08:32 PM
  #20  
derekderek
CF Senior Member
 
Member Since: Jul 2015
Location: Westville NJ
Posts: 5,131
Received 674 Likes on 624 Posts
Default

Check them all.
derekderek is online now  

Thread Tools
Search this Thread
Quick Reply: Bearing material in pan, what would you do?


Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: