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Roverbeam
Chad McNeely
N.E. MO
(38 posts)

Registered:
06/09/2021 06:03PM

Main British Car:
Alpine S4 Rover 4.0

Main bearing interchange
Posted by: Roverbeam
Date: March 15, 2022 02:03PM

I’m putting a Buick 300 crank in a Rover 4.0 block. The crank is getting ground -.010 or -.020 to clean up some scoring.

The engine machinist really prefers tri-metal bearings over bi-metal. I can get Buick undersized bearings (Clevite MS 961P in -10 or -20), or just stock Rover oem-style ones from the usual Rover sources.

Do the Buick bearings fit the Rover block, ie same widths? With crank and block at two separate machinists, I’m trying to play go-between…


mgb260
Jim Nichols
Sequim,WA
(2277 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: Main bearing interchange
Posted by: mgb260
Date: March 26, 2022 11:52AM

Chad, This article is helpful. There are undersized Rover 4.0/4.6 main bearings available from D&D now.
[www.britishv8.org]



Edited 1 time(s). Last edit at 03/26/2022 12:20PM by mgb260.


Roverbeam
Chad McNeely
N.E. MO
(38 posts)

Registered:
06/09/2021 06:03PM

Main British Car:
Alpine S4 Rover 4.0

Re: Main bearing interchange
Posted by: Roverbeam
Date: March 26, 2022 02:50PM

Thank you Jim! I have seen a different version of that article on the Aluminum V8 site, but I don’t recall its specific mention of the main bearing differences.

My engine guy/machinist is reluctant to line bore, since it’s a half-aluminum, half-iron project that’s easy to screw up. Since that article was written, there are now several suppliers of undersize Rover bearings, but they’re all oem style, bi-metal ‘hard’ bearings. Engine guy likes tri-metal, soft bearings. So I’m kinda stuck between two conflicting choices!

I’ll try to have a chat with him Monday and sort it out.


mgb260
Jim Nichols
Sequim,WA
(2277 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: Main bearing interchange
Posted by: mgb260
Date: March 26, 2022 05:34PM

Chad, You will also need D&D 300 crank rear seal adapter and special flywheel. Years ago Phil Baker used a Chevy Nova flywheel that was dished.


Roverbeam
Chad McNeely
N.E. MO
(38 posts)

Registered:
06/09/2021 06:03PM

Main British Car:
Alpine S4 Rover 4.0

Re: Main bearing interchange
Posted by: Roverbeam
Date: March 26, 2022 07:00PM

Got ‘em already. ;-)


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