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eireann311 Samba Member
Joined: January 15, 2012 Posts: 7
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Posted: Sat Jul 12, 2025 3:57 pm Post subject: Main Bearing |
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Anyone have any idea how this happens?
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Glenn  Mr. 010

Joined: December 25, 2001 Posts: 79424 Location: Sneaking up behind you
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Posted: Sat Jul 12, 2025 4:04 pm Post subject: Re: Main Bearing |
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No endplay. _________________ Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
Member #1009
#BlueSquare
עַם יִשְׂרָאֵל חַי |
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Brian_e  Samba Member

Joined: July 28, 2009 Posts: 3961 Location: Rapid City, South Dakota
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Posted: Sat Jul 12, 2025 4:06 pm Post subject: Re: Main Bearing |
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Super loose end play, and no crush left on the bearing? It might have been moving in the case every time you pushed in the clutch, and it finally broke the flange?
Brian _________________ So more or less the lazier and stupider you want to be, the nicer quality parts you need to buy.
-Modok
www.type-emotorsports.com
Type E Engine Parts and Supplies
https://type-emotorsports.com/collections/engine-parts |
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modok Samba Member

Joined: October 30, 2009 Posts: 27652 Location: Colorado Springs
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Posted: Sat Jul 12, 2025 4:41 pm Post subject: Re: Main Bearing |
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Crowbar in a sandbox?
If that's supposed to be the main thrust side of the bearing.....why are the 4 oiling reliefs missing?
oh, well maybe that's why
or
standard width bearing in a case already thrust cut?
Or, it didn't fit the case right, thrust faces look larger than normal, I vaguely recall some kind bearings like that, oz made? or repco?
Anyway, it would have worked if i'd put it in, but such details can be easily overlooked. |
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mikedjames Samba Member

Joined: July 02, 2012 Posts: 3301 Location: Hamble, Hampshire, UK
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Posted: Sun Jul 13, 2025 1:03 am Post subject: Re: Main Bearing |
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Heat. _________________ Ancient vehicles and vessels
1974 VW T2 : Devon Eurovette camper with 1641 DP T1 engine, Progressive carb, full flow oil cooler, EDIS crank timed ignition.
Engine 1: 40k miles (rocker shaft clip fell off), Engine 2: 30k miles (rebuild, dropped valve). Engine 3: a JK Preservation Parts "new" engine, aluminium case: 26k miles: new top end.
Gearbox rebuild 2021 by Bears.
1979 Westerly GK24 24 foot racer/cruiser yacht Forethought of Gosport.
1973 wooden Pacer sailing dinghy |
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Brian_e  Samba Member

Joined: July 28, 2009 Posts: 3961 Location: Rapid City, South Dakota
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Posted: Sun Jul 13, 2025 6:55 am Post subject: Re: Main Bearing |
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modok wrote: |
If that's supposed to be the main thrust side of the bearing.....why are the 4 oiling reliefs missing. |
That’s what I thought.
The alignment dowel hole shows that should be the flywheel side, but the oil slots are gone, and the ID chamfer looks big enough to be on the crank side.
Maybe the case wasn’t machined large enough of the extra OD on the flange, and then hammered it in to place, and split the bearing?
Brian _________________ So more or less the lazier and stupider you want to be, the nicer quality parts you need to buy.
-Modok
www.type-emotorsports.com
Type E Engine Parts and Supplies
https://type-emotorsports.com/collections/engine-parts |
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Glenn  Mr. 010

Joined: December 25, 2001 Posts: 79424 Location: Sneaking up behind you
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Posted: Sun Jul 13, 2025 7:14 am Post subject: Re: Main Bearing |
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Whatever the case, it's No Bueno. _________________ Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
Member #1009
#BlueSquare
עַם יִשְׂרָאֵל חַי |
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eireann311 Samba Member
Joined: January 15, 2012 Posts: 7
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Posted: Sun Jul 13, 2025 8:36 am Post subject: Re: Main Bearing |
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Standard case and thrust on the bearing, my guess is I managed to get the end play incorrect which lead to over heating and the end result? Perhaps? |
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VW_Jimbo  Samba Member

Joined: May 22, 2016 Posts: 11113 Location: Huntington Beach, CA
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Posted: Sun Jul 13, 2025 9:36 am Post subject: Re: Main Bearing |
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eireann311 wrote: |
Standard case and thrust on the bearing, my guess is I managed to get the end play incorrect which lead to over heating and the end result? Perhaps? |
The bearing’s bearing surface does look a little bit cooked! I bet it expanded and the weakest point gave up the ghost!
What are the punch marks in the bearing surface? Maybe it is the picture or? _________________ Jimbo
There is never enough time to do it right the first time, but all the time necessary the second time!
TDCTDI wrote: |
Basically, a whole bunch of fuckery to achieve a look. |
67rustavenger wrote: |
GFY's Xevin and VW_Jimbo!  |
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modok Samba Member

Joined: October 30, 2009 Posts: 27652 Location: Colorado Springs
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Posted: Sun Jul 13, 2025 2:35 pm Post subject: Re: Main Bearing |
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eireann311 wrote: |
Standard case and thrust on the bearing, my guess is I managed to get the end play incorrect which lead to over heating and the end result? Perhaps? |
What?
I posted everything you need to know and you understood none of it.
Read harder
Use a NORMAL bearing, or learn what it's supposed to look like so you can make your wrong bearing right.
Where did you get this goofy bearing? Does it have a name?
If you want to know HOW MANY oiling reliefs a thrust bearing should have, it would be at least three, but maybe as many as six, nobody really knows, but zero is the wrong answer for sure. Berg built engines ofen have oiling reliefs on the other side of the bearing too, and..... that's not a bad idea. |
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