11 replies to this topic

[77CLUBBIEVAN]

Hey guys new to the forum so be gentle.

 

Hopefully ill be able to find everything i need and once my van is complete will post pictures.

 

Now i have just scored half a trailer of engines etc in various degrees of disrepair and have a couple of questions relating to some of the engines i have as i cant seem to find anything ( or understand what i have found ) onine.

 

I have

2 x 998's easy to identify with engine prefix - 9YA/Ta/H13054, 9YA/Ta/H22738

 

2 x 1098's again easy to identify -  10Y/Ta/H33808, 10Y/Ta/H30098

 

1 x 850 High compression? - 8AM/UH/557137

 

and now 3 i have no idea.

 

1 engine number only has V601480P but on the side of the block near the distributor hole? it says 800 so im assuming its an early 803?

 

the other 2 are

 

9F/SA/L9608

9F/SA/L12880

On the side of these 2 it has 1000 and under that 12G202. Am i right in thinking i have a couple of 997 cooper motors?

 

Any help would be greatly appreciated.

 

Craig

 

 

[Spider]

The 2 x 9YA Engines are from Mini Deluxe, locally manufactured engines, these will also likely have press fit gudgon pins.

 

The 2 x 10Y Engines are early locally manufactured 1100 engines, most likely originally fitted to Mini K.

 

The 8AM is early 850 engine, imported. High Compression, I think you'd have to remove the head to check. While they were supposedly stamped for High Compression, I haven't always found that the way. And it depends on your definition of High Compression - 8.3:1 The LC types were only 7.8:1 - it's a wonder then even ran!

 

The V601480P sounds very much to me that it was re-stamped at some point by the Police. You'd probably have to remove the head to work out what it is.

 

the 2 x 9F/SA/L Engines are indeed 997 Cooper. Although they are fitted with the 12G202 Heads, these are the same casting as the 1100 type heads, but fitted with bigger Inlet Valves, there's not a lot of difference here, so don't get too excited.

Edited by Moke Spider, 17 August 2016 - 07:14 AM.

[77CLUBBIEVAN]

Thanks for the reply. Will have a look at the 850 and v number and see what i have.

[77CLUBBIEVAN]

Ok guys here's another query

I just pulled one of my engine blocks out of my molasses bath and took some measurements to see what i have to play with.

The engine mentioned above 9F/SA/L/12880 looks by engine number and further investigation to be a 970 cooper motor although moke spider said they are 997?. Stamping looks to be original however the bore is the same as a standard 998???

The rest of the casting numbers on the block are as follows

1000

12A204

0275

 then on the right (rear) of block it has 

WMO

21087-29.

 

Any help is greatly appreciated

[Spider]

970's had engine prefixes of 9F/Sa/X, 9FD/Sa/X and 9FE/Sa/X depending on Crankcase Breathers and Oil Filter type fitted.

 

also, 970 S Blocks had the number AEG131 cast in to the back side of them.

 

The "1000" cast on the back of your block further denotes it as being a 997, as does the 12A204.

 

What's the actual bore size you've measured?

 

<Edit: 998 Cooper Blocks were stamped 9FA/Sa/H, 9FD/Sa/H, 9FD/Xa/H and the very last of them were 99H >

Edited by Moke Spider, 18 October 2016 - 10:15 AM.

[77CLUBBIEVAN]

thanks for clearing that bit up Moke Spider. i wasnt sure if the "X" meant it could be any letter except "H" which is what i have been able to find online for 997's.

I wasn't dissing your earlier reply just read to much and probably confused myself.

Bore size is close enough to 64.58 mm.

Edited by 77CLUBBIEVAN, 18 October 2016 - 10:20 AM.

[Spider]

No problem.

 

The bore size does seem to be that of a 998. On some 997 blocks, it was possible to bore them to take 998 pistons, especially as 997 pistons are thin on the ground.

 

Have you got the crankshaft to go with it?  A 998 Crank nor an 1100 crank will readily fit the 997 block, the centre main on the 997 is narrower.

Edited by Moke Spider, 18 October 2016 - 10:35 AM.

[77CLUBBIEVAN]

I believe so but i got that much stuff in the one load i haven't had a chance to go through it fully.

Thanks for your help.

[Spider]

I was just looking at some early (very early) stuff. There was a short run of 1071 Cooper S Blocks (as these were the first big bore engines used in a Mini) that did also share the same engine number as the early 997 Cooper Blocks, but these had AEG151 cast in to the back of them and a much bigger bore than what you have!  There was only very few of these stamped this way.

 

<Edit: The 1071 engines pre-date the 970 types. Pretty much as the 970 (and 1275) started production, the 1071 was phased out within the month. >

Edited by Moke Spider, 18 October 2016 - 10:51 AM.

[77CLUBBIEVAN]

Just went and dug around in the cold and yes i have the crank for it.
So by my calculations it is basically a 1065? 

any ideas on what this might be like as an engine? obviously with the right head work and cam.

[Spider]

It has the potential to make good power, and, like 998's you'll need to rev it a fair bit, but the 997 cranks aren't great for any kind of respectable life when you do rev them, I'd suggest an upper limit of 6500 RPMs.

 

Put another way, it can do it, but will die in the process.

 

The 997s aren't a brilliant engine. They are really 'early days' for the A Series, especially in a tuned form of the engine. The blocks are essentially Morris Minor Blocks (hence where the '1000' cast in to it comes from), with all the spindly bits that they had, along with bolted pinched little end con rods that let go when the revs are put on. While the rods are a straight swap for later types, it does illustrate and highlight it's intended strength.

 

IMO, they are an engine to fit in to a 997 Cooper to maintain some sort of originality and value in the vehicle, they are not a 'performance' engine.

[77CLUBBIEVAN]

ok.

might see if i can find someone looking for one for a resto.

Thanks for all your help. much appreciated by a newb.

 

Time to focus on the 1330 build

Edited by 77CLUBBIEVAN, 18 October 2016 - 11:33 AM.