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#623184 - 11/08/09 07:23 AM Re: 1275 Rebuild Problem [Re: DrEntropy]
mxp01 Offline
Jedi Trainee

Registered: 10/20/06
Posts: 253
Loc: Nassau, the Bahamas
Dr.:

Moss and VB list these bolts at $37 each. Can you tell me the part number from Summit (I've looked, but can't determine).

Thanks,
Mike Pennell

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#623260 - 11/08/09 02:05 PM Re: 1275 Rebuild Problem [Re: mxp01]
ChrisS Offline

Platinum Member
Jedi Knight

Registered: 08/17/04
Posts: 1217
Loc: Austin, TX
206-6001
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I don't have a solution but I admire the problem.
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#623266 - 11/08/09 02:29 PM Re: 1275 Rebuild Problem [Re: ChrisS]
mxp01 Offline
Jedi Trainee

Registered: 10/20/06
Posts: 253
Loc: Nassau, the Bahamas
Thanks, Chris.

$89 beats 8 x $37 any time!

Mike Pennell

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#623318 - 11/08/09 05:47 PM Re: 1275 Rebuild Problem [Re: DrEntropy]
Legal Bill Offline
Jedi Trainee

Registered: 11/10/03
Posts: 391
Loc: Boston, MA
Originally Posted By: DrEntropy
Actually, the bearings are designed such that the shells are pinned where they mate at the seams. I'd be surprised if that slight bit of over-torque would cause any distortion. Some Plasti-Gauge would reveal ill fit, looking at the inner (babbitt) edges after assembly lube, retorque and spinning the crank would reveal "smushed" end areas. They'd be "shinier" than the rest of the bearing surface if distorted.


In general, I agree. We used plasti-gauge all the time when we were building race motors. Applying higher levels of torque to try and prevent distortion at the mains often showed the bearings had been overtorqued. I'll have to take a look at Vizard's book to see what it says about the issue.
_________________________
Things I need:
lock cover for the back side of a BJ8 glove box door
3/8 generator pulley for 1965 BJ8
Please PM me if you have any of the above for sale.

All the pieces falling off my car were engineered to the highest British standards.

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#623404 - 11/09/09 12:08 AM Re: 1275 Rebuild Problem [Re: Legal Bill]
Hap Waldrop Offline

Gold Member
Darth Vader

Registered: 06/12/02
Posts: 2715
Loc: Greenville, SC
Rods need to re-sized on the big ends when rod bolt are installed, and I use ARP 206-6001 in every 1275 I build. Resizng the connecting rods is one of the biggest things looked over in a hobbist rebuild, and most times one of the most needed machining jobs to do in rebuild. Connecting rods over time get egga shaped, getting bigger at the parting line of the two section of the rods, and don't hold the bearing as well, I consider sizing the connecting rod big end a absolute must on engine rebuild.
_________________________
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Acme Speed Shop (BCF supporting vendor)
Greenville, SC
(864) 370-3000
Performance/Race MGB/Spridget engines/cyinder heads
VTO Classic 8 and Retro 4 Wheels
Quality Engine Rebuilding Kits
www.acmespeedshop.com

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