Engine and Transmission Tech

tips, technology, tools and techniques related to vehicle driveline components

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Moderator
Curtis Jacobson
Portland Oregon
(4411 posts)

Registered:
10/12/2007 02:16AM

Main British Car:
71 MGBGT, Buick 215

authors avatar
Rover V8 ID numbers
Posted by: Moderator
Date: April 07, 2008 03:39PM

I took these snapshots (below) the other day to illustrate an old article for the archives about identifying Rover's by their engine i.d. numbers. The article isn't formatted-up yet, but I thought you guys might enjoy the photos.

And you might be interested in a couple quick weight measurements I took:
1a) stripped-down Rover 4.0 block with 4-bolt mains (x5) and bolts (x20) - 76.0#
1b) stripped-down Buick 215 block with 2-bolt mains (x5) and bolts (x10) - 73.0#
2a) stripped-down Rover 4.0 head (i.e. no valves or springs) - 17.0#
2b) stripped-down Buick 215 head - 15.6#
Note: the Rover 4.0 uses four fewer head bolts per side. Its valves are slightly bigger, as are its exhaust ports.

I thought there'd be a bigger weight difference between Buick and Rover blocks.

Rover-Engine-ID-A.jpg

Rover-Engine-ID-B.jpg

Rover-Engine-ID-C.jpg
(Later Rovers use a cam retainer, which mounts here.)

Rover-Engine-ID-D.jpg

all photos copyright British V8 yadda yadda yadda


Moderator
Curtis Jacobson
Portland Oregon
(4411 posts)

Registered:
10/12/2007 02:16AM

Main British Car:
71 MGBGT, Buick 215

authors avatar
Re: Rover V8 ID numbers
Posted by: Moderator
Date: April 07, 2008 04:04PM

One more photo...

Rover-Engine-ID-E.jpg
(Compared to earlier engines, the 4.0/4.6 have really fat webs across the valley but the bosses for the extra head bolts have been eliminated.)


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5828 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Rover V8 ID numbers
Posted by: BlownMGB-V8
Date: July 04, 2008 05:13PM

What is that round cover opposite the starter opening?

Jim


Moderator
Curtis Jacobson
Portland Oregon
(4411 posts)

Registered:
10/12/2007 02:16AM

Main British Car:
71 MGBGT, Buick 215

authors avatar
Re: Rover V8 ID numbers
Posted by: Moderator
Date: July 04, 2008 06:15PM

I don't know what its original purpose was... but apparently at some point they started placing a Hall effect (crank position) sensor in that spot for the direct ignition system. When I picked up this block, the sensor was missing, but there was a sheet metal tone wheel riveted to the front of the flex plate.


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