6 replies to this topic

[jm1na]

Hi all, I'm checking out a '69 mini(Canadian model) with a supposed 1275 cooper S block with austin america head on it. No serial tag on the block. So is there any other way of verifying it's an S block? The present seller claims that since it has tappet covers on the side of the block facing the firewall that it's indeed a cooper S block.

True or false?

thanks!

Ron

Edited by jm1na, 19 October 2009 - 09:06 PM.

[huw_jenks]

Hi all, I'm checking out a '69 mini(Canadian model) with a supposed 1275 cooper S block with austin america head on it. No serial tag on the block. So is there any other way of verifying it's an S block? The present seller claims that since it has tappet covers on the side of the block facing the firewall that it's indeed a cooper S block.

True or false?

thanks!

Ron

A 1275 Cooper S does have tappet covers on the back, a standard 1275 doesn't.

But, I think all small bore engines also have tappet covers, so you'll need to make sure it is a 1275. I'm not sure if you can do that by looking at the outside... surest way would be to take off the head and measure the bore.

[mk1leg]

A cooper 'S' block has 11 stud holes in block face No fuel pump outlet on back of block and should have a ally plate with 970, 1071 and 1275 stamped into it rivited to block where blanked off fuel pump is ..............

[Asphalt]

11 studs are easily retro fitted...

Save & secure way:
Look after the block's cast number.
It's below the driver's side (RHD) tapped cover.
Hard to look up if engine's in the car though...

1275 'S' will be AEG312/AEG631 or AEG312.
So basicly will have a AEG number instead of a 12G...

[Ivor Badger]

Look along the top face of the block. 1275 S blocks have a casting line along the line of the gasket 1/8" below the face. It comes from the spacer fitted to the casting pattern to extend the block for the longer stroke of a 1275. 1098 blocks which are windowed, do not have the mark.

There are also 2 round bosses cast into the back of the oil feed in the block to allow the fitting of a dry sump system.

[Dan]

A cooper 'S' block has 11 stud holes in block face

Not always.

[jm1na]

Thanks everyone, here is a link to a photo album of the car, can anyone tell anything by the picture of the engine in the album as to what it is? I'll see if I can get the owner to find the number on the block.

http://picasaweb.goo...91jm1na/69Mini#

A cooper 'S' block has 11 stud holes in block face

Not always.