
How To Find Out My Engine Size?
Started by
tom1990
, Oct 03 2009 10:03 AM
5 replies to this topic
#1
Posted 03 October 2009 - 10:03 AM
i have a 1984 Austin mini city E with a 998cc on the v5 doc. I went to the garage the other day and the bloke says it might be a 1.3 looking at the carb and with the engine being red. He said they might just be mods but he said i could find out by the number on the plate but i dont have one. Anyone know any other way of finding out?
#2
Posted 03 October 2009 - 10:09 AM
It's quite easy as long as the engine number is present.
It will be stamped on a little plaque located at the front rigtht side of the engine block, above and to the right of the plugs (radiator end).
Essentially, if it starts with a 9 it's a 998, if it's a 12 it's a 1275.
You can also look up EXACTLY what it is on GuessWorks's website. (He's a member on here...)
Edit: Just re-read your question. You don't have the plate, right? Are you sure - sometimes they are VERY VERY grimey.
It will be stamped on a little plaque located at the front rigtht side of the engine block, above and to the right of the plugs (radiator end).
Essentially, if it starts with a 9 it's a 998, if it's a 12 it's a 1275.
You can also look up EXACTLY what it is on GuessWorks's website. (He's a member on here...)
Edit: Just re-read your question. You don't have the plate, right? Are you sure - sometimes they are VERY VERY grimey.

Edited by daemonchild, 03 October 2009 - 10:10 AM.
#3
Posted 03 October 2009 - 10:10 AM
All you need to do is to look down the back of the engine behind the exhaust manifold.
If there are two rectangular plates fitted there then it's a 998. If it has a solid casing, then it's a 1275.
The only exception to this is on pre-1971 Cooper 'S' 970, 1071 and 1275, which had those cover plates. The cover plates allow access to cam followers without the need to remove the cam.
The alternative is to measure the stroke by taking the plugs out, bringing the engine to TDC, then with a thin wooden stick (a pencil will do), measure how far down the bore the stick moves to BDC. A 1275 will go down 3.2" whilst a 998 will go down 3.00"
If there are two rectangular plates fitted there then it's a 998. If it has a solid casing, then it's a 1275.
The only exception to this is on pre-1971 Cooper 'S' 970, 1071 and 1275, which had those cover plates. The cover plates allow access to cam followers without the need to remove the cam.
The alternative is to measure the stroke by taking the plugs out, bringing the engine to TDC, then with a thin wooden stick (a pencil will do), measure how far down the bore the stick moves to BDC. A 1275 will go down 3.2" whilst a 998 will go down 3.00"
#4
Posted 03 October 2009 - 10:13 AM
All you need to do is to look down the back of the engine behind the exhaust manifold.
If there are two rectangular plates fitted there then it's a 998. If it has a solid casing, then it's a 1275.
Nice. That's the "Tom must learn something each day" box ticked.

#5
Posted 03 October 2009 - 10:27 AM
cheers thanks a lot I'll have a look in a min. And i seem to learn something new everyday bout my mini lol
#6
Posted 03 October 2009 - 10:38 AM
After 49 years around Minis of all types, I still learn new things and new ways of resolving problems.
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