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dennis 356 Samba Member
Joined: January 09, 2009 Posts: 100 Location: Malmö, Sweden
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Posted: Tue Mar 06, 2018 8:02 am Post subject: Question about misplaced tabs on contemporary big end b. shells? |
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Would like to ask what to do with the nowaday´s big end bearings and their tabs being placed on a wrong side?
Is it just to grind down the tabs hopping the bearings won´t spin? Sounds like a bit optimistic......or is there another trick to it?
I´ve seen Walter Odenthal on Youtube doing something like grinding down the newly purchased bearings/tabs, but one couldn´t get a good look at how and what he did and he never explained anything on the subject either (odd when anyway doing an educative video), so still greek to me......?
Anyone of you guys with experiance know?
Thanks,
Dennis |
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badsix Samba Member
Joined: November 22, 2007 Posts: 228 Location: coos bay or.
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Posted: Tue Mar 06, 2018 10:05 am Post subject: Re: Question about misplaced tabs on contemporary big end b. shells? |
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I sure wouldn't grind the tabs off, that's a disaster looking for a place to happen. what you need to do is get a set of later rods with the tab on the correct side they are a much better rod also.
Jay D. |
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dennis 356 Samba Member
Joined: January 09, 2009 Posts: 100 Location: Malmö, Sweden
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Posted: Tue Mar 06, 2018 3:15 pm Post subject: Re: Question about misplaced tabs on contemporary big end b. shells? |
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badsix wrote: |
I sure wouldn't grind the tabs off, that's a disaster looking for a place to happen. what you need to do is get a set of later rods with the tab on the correct side they are a much better rod also.
Jay D. |
I think just a brand new rod set comes with the tabs placed on the correct side and that would be a bundle to pay just because of some malplaced lousy tabs, no there must be another way.....have a hard time imagining everyone restoring a 356 motor has to buy another con rod set because of this......
Dennis |
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MoPor Samba Member
Joined: December 03, 2010 Posts: 292 Location: Canada
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dennis 356 Samba Member
Joined: January 09, 2009 Posts: 100 Location: Malmö, Sweden
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Posted: Wed Mar 07, 2018 12:58 am Post subject: Re: Question about misplaced tabs on contemporary big end b. shells? |
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I´ve one set 502 rods for one of the engines and 616 ones for the two other engines.
Dennis |
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dennis 356 Samba Member
Joined: January 09, 2009 Posts: 100 Location: Malmö, Sweden
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Posted: Wed Mar 07, 2018 1:48 am Post subject: Re: Question about misplaced tabs on contemporary big end b. shells? |
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Started dismantelling con rods from the late A crank yesterday and found ground off tabs on the bearing shells, odd, a job that must be at least 30 years old, was it difficult sourcing correct shells already than?
Dennis
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badsix Samba Member
Joined: November 22, 2007 Posts: 228 Location: coos bay or.
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Posted: Wed Mar 07, 2018 9:34 am Post subject: Re: Question about misplaced tabs on contemporary big end b. shells? |
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you can buy used 616 rod reasonable then have them reconditioned. its a lot cheaper than buying new rods.
Jay D. |
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dennis 356 Samba Member
Joined: January 09, 2009 Posts: 100 Location: Malmö, Sweden
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Posted: Wed Mar 07, 2018 10:10 am Post subject: Re: Question about misplaced tabs on contemporary big end b. shells? |
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I´ve found out what the trick is, or how to adjust the old con rods to the "new" bearings when disassembling yet another crank (B) today and where the late style bearing shells fit in with no problems still using the original con rods, thanks to reworking them slightly. Could be done by a machine and also apparently just with the help of a small dremmel and a vice as in this Youtube video (into the 2th minute).
https://www.youtube.com/watch?v=X13VNtfE90E
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Starbucket Samba Member
Joined: April 30, 2007 Posts: 4007 Location: WA
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Posted: Wed Mar 07, 2018 3:19 pm Post subject: Re: Question about misplaced tabs on contemporary big end b. shells? |
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Buy a small chisel (metal not wood chisel) and grind the sharp point to a flat a little less wide than the notch and put the bearing in one half and clamp gently across face on the opposite side of studs/bolts in a vise (protecting the split face from vise jaws to keep bearing from moving) and take a small ball peen hammer and give the bearing a gentle whack where the tab goes and vola! new tab in correct place. No tab = spun bearing within a few miles of driving. Check that rod rotates freely after torqueing.
30+ years of making Babbitt bearings and rebabbitting old bearings. |
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