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02-06-2021, 10:01 AM | #21 |
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Location: Mt. Pleasant, SC
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Re: Pic of #4 rod/bearing.
The bearing doesn’t look bad. As others have suggested, clean it up and see if you can set the correct clearance. I like to use Plastigage for this.
Jim |
02-06-2021, 10:43 AM | #22 |
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Re: Pic of #4 rod/bearing.
I'm going deeper on the babbit question.I agree with the antimony content and shiny/harder theory...its not an oxidation result that I can tell what I know about oxidation and corrosion is it occurs from the outside -in and ultimately affects the surface...in this case the surface is perfect.
This block has been repaired ,it cracked 2&3 exhaust seat to cylinder.The repair work is beautiful and precise..ill shoot some more pictures today.the previous owner/ builder was a master machinist at Aero-jet,the rocket/ space research/defense outfit..I wonder if he used an uncommon /exotic babbit design. |
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02-06-2021, 11:06 AM | #23 |
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Location: 40 Mt.Vickery Rd. Southborough,MA 508-460-0733
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Re: Pic of #4 rod/bearing.
That's lead based babbitt from the pictures you've shown of the B rod.
If it was tin/nickel antimony it wouldn't turn dark and dull as lead does. It would still be bright as the example I have included. |
02-06-2021, 11:09 AM | #24 | |
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Re: Pic of #4 rod/bearing.
Quote:
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02-06-2021, 11:27 AM | #25 |
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Re: Pic of #4 rod/bearing.
Its not a high lead content that i can tell,lead scores easy,this is very hard.
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02-06-2021, 12:50 PM | #26 |
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Location: South California
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Re: Pic of #4 rod/bearing.
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Thanks ! I didnt get IT then, and dont know about now. I think that I heard what I thot you said, but not sure that what you said is not what I meant to hear. Did I tell you I have dyslexia. So, Im out in shed with flashlight.... in PJs...with ice pick in hand ! She , standing on porch..100 ft away, says the samhell are you doing !! Scratching the babbitt ! WHAT are you doing to the baby ???? Come in, your oatmeal is ready ! Yum..oatmeal... ok. Did you forget to take you medicine.. again ? No no, John said to scratch...forget it. BTW... it scratched easily.. the babbitt. Last edited by hardtimes; 02-06-2021 at 12:52 PM. Reason: Zzzzzzz |
02-06-2021, 01:04 PM | #27 |
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Re: Pic of #4 rod/bearing.
The oxidation is only surface deep. It probably doesn't go any deeper than a few molecules.
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02-06-2021, 01:20 PM | #28 |
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Re: Pic of #4 rod/bearing.
Agreed Neil but its consistent,the coloration has no deviation...Hopefully I can get back on it today and give a better example of what it is.
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02-06-2021, 04:53 PM | #29 |
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Re: Pic of #4 rod/bearing.
Ok, so I just used crocus cloth as you suggested. Yeah, some improvement in appearance !
I’m familiar with this idea/process ! Dont think I can do maybe one a day. You old enough to get raspberry marks, or to know what they are ? I got plenty today by , just from just one throw. That and arthritis and done for the week now. She says ... work smarter !! I say hiring some yute to do...is smarter. Anyway, I’ll geterdone. |
02-06-2021, 06:37 PM | #30 |
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Re: Pic of #4 rod/bearing.
Is this an engine that has been run in the past or is it a "fresh" rebuild. If it has been run and the babbit looks like that I wouldn't loose much sleep about running it.
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02-06-2021, 07:13 PM | #31 |
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Re: Pic of #4 rod/bearing.
Get a die grinder and some wool pads,use jewelers rouge it will polish like a mirror...works good on stainless too..crocus cloth too much work..
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02-07-2021, 02:53 AM | #32 | |
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Re: Pic of #4 rod/bearing.
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ITve been working at it hard most days. If I had a little help, I’d have it running. So far, I’ve been able to make great progress. I have stop for couple days, to give my swollen hands rest. This engine had good work done to it, who knows when. It obviously was not given proper care/maintenance, and stored that way years ago, IMO. I will make upgrades and get it running ....soon. If receive lemon, make lemonade !! |
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02-07-2021, 03:06 AM | #33 | |
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Re: Pic of #4 rod/bearing.
Quote:
So is lead still used or is this real old babbitt ? UPDATE: Rods 1,2and 3 are really nice babbitt and journals...bright/shiny !! Last edited by hardtimes; 02-08-2021 at 01:48 PM. Reason: Zzzzzzz |
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