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Bearing material in pan, what would you do?

 
Old 12-31-2018, 06:05 PM
  #41  
randallsteel
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Hereís an example of one. Definitely not great, but I think fine. There are no large chunks missing. The crank surface also looked fine. Rod caps were similar. Some wear but no large pieces missing. Maybe that metal was leftover from previous engine work or its cam bearing damage or gasket material. Def strange.
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Old 12-31-2018, 06:20 PM
  #42  
domenic tallarita
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Those look like the copper alloy bearings that were standard. As long as the babbit is still over the copper they look servisable. But why not spend a few bucks and change them. bearings are cheap.
Dom
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Old 12-31-2018, 07:41 PM
  #43  
Big2Bird
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Pull the rear main and change the seal. Your there.
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Old 12-31-2018, 10:54 PM
  #44  
jackson
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is that main cap OE or aftermarket?
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Old 12-31-2018, 11:59 PM
  #45  
theandies
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I'd be starting my LSx conversion.
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Old 01-01-2019, 01:45 AM
  #46  
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Bearings dont fail like that. You have it apart change the bearings.
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Old 01-01-2019, 12:26 PM
  #47  
Andysherman
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Kinda looks like material from a windage tray...
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Old 01-01-2019, 03:18 PM
  #48  
REELAV8R
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Originally Posted by Andysherman View Post
Kinda looks like material from a windage tray...
No , post # 23

OP, at 108,000 miles there is nothing wrong with that bearing surface. I'd leave it unless you want another 100,000 miles from the bearings, which you won't likely get from the rest of the motor without having to change the rings, or a valve burning or cam lobe going flat, head cracking etc. But it's up to you.

have you checked the block stamp to see if that is the original engine for that L-48?

Last edited by REELAV8R; 01-01-2019 at 03:25 PM.
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Old 01-01-2019, 04:01 PM
  #49  
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Originally Posted by REELAV8R View Post
No , post # 23

OP, at 108,000 miles there is nothing wrong with that bearing surface. I'd leave it unless you want another 100,000 miles from the bearings, which you won't likely get from the rest of the motor without having to change the rings, or a valve burning or cam lobe going flat, head cracking etc. But it's up to you.

have you checked the block stamp to see if that is the original engine for that L-48?
I agree. For 108K miles they look pretty good. I don't see excess damage. I see normal wear. I wouldn't worry about it. Your oil pressure is good, put the pan back on and enjoy it.
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Old 01-01-2019, 05:19 PM
  #50  
domenic tallarita
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Just thought of something. That has to be the soft babbit by the way it melts, so it had to come from a bearing. You inspected the crank bearings, so maybe from the cam bearings? Now I have seen camshafts installed where the mechanic didn't lift the SHARP cam lobes past the cam bearings and the lobe scraped the babbit from the cam bearing.

Dom

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Old 01-01-2019, 08:30 PM
  #51  
derekderek
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Have you pulled the bearing out if the cap? It will say something like FM or sealed power or GM100 and a month-year date. Will tell us if rebuilt or orig. And tell you what bearing sizes.
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Old 01-02-2019, 08:11 AM
  #52  
randallsteel
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Just to update everybody....Iím in the process of putting the pan back on (Takes me awhile I only get an hour or two a day to work on it). I didnít pull a bearing out of the cap, didnít want to disturb them or introduce any dirt to the babbit. And Iíve already retorqued them all back into place. I donít really feel like replacing the rod bearings while not the mains at the same time. I know there was some advice about how to do it with the engine in the car butttttt seems too adventurous for me. Disappointing news...... Iíve owned the car for 5 years and Iíve believed it was numbers matching, based on what the seller said. Iíve never checked until now. Itís not numbers matching. According to the engine stamp itís a 350 from a 1976 truck. Explains why itís a 4 bolt main when L48s are supposed to be 2 bolt mains. No idea how many miles are actually on the truck engine. Canít be too many because it doesnít use a single drop of oil. Oil pressure is 35 pounds at idle cold and drops to like 25-30 when hot. I just ordered some headers last week and Iím going to install them this weekend. Just going to drive it and enjoy it. I think the babbit material must be from previous work or cam bearing. Thanks dudes for all the advice, tips and other thoughts/views. It really helps out.
Randall
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Old 01-02-2019, 08:14 AM
  #53  
dmaxx3500
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did you ever ck the rear main thrust bearing?
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Old 01-02-2019, 10:17 AM
  #54  
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Good for you randall. Drive it like its stolen. That's a big job trying to change the bearings while in the car. Not knowing what clearance you have and buying the wrong bearings could spell disaster. I like using Plasticgauge on journals, used it for years, its a poormans micrometer. But to try to remove and replace the upper main bearings properly would be a nightmare.

Its easy for posters to order you around from the comfort of their chair & laptop. And its good that you have shown your concern about finding some debris in the oil pan. You have followed up on the issue. You asked great questions. You got good answers. Things looked good. You did not panic and pull the engine like some posters were getting at.

Just for peace of mind thou, I think I would change the oil filter only after some mileage. Also, see if you can find a magnet that fits on the oil pan bottom. I have one about 2" in dia, super strong, never falls off, but I don't know where I bought it. Then when you change your oil in the future, just remove the magnet briefly while draining oil.

You did the right thing. Enjoy the ride.
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Old 01-02-2019, 10:28 AM
  #55  
REELAV8R
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A truck motor for a 75 would be an upgrade. I’d be glad someone put it in there for me
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Old 01-02-2019, 11:01 AM
  #56  
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Trucks had less draconian emissions specs. But I would try to figure cam lift-duration. But in 76, the quickest production vehicle was that Dodge lil red express truck. Based solely on the emission specs that motor didn't have to confirm to compared to cars.
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Old 01-03-2019, 01:05 PM
  #57  
7T1vette
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Did you mention whether that 'stuff' you found in the oil pan could be picked up with a magnet (indicating iron/steel) or not?

Last edited by 7T1vette; 01-03-2019 at 01:05 PM.
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Old 01-03-2019, 01:13 PM
  #58  
domenic tallarita
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He said it melted so it would have to be babbit.

Dom
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Old 01-03-2019, 11:42 PM
  #59  
7T1vette
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Most likely...
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Old 01-06-2019, 03:00 PM
  #60  
Maddog82
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I'd drive it for a while do the oil sample lab deal. I'd guess those pieces are leftover junk from 30 years ago.
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