I have just pull a 1380 down for a re-ring and bearings and unsure what these rods are from. They are have 1.625 journals but the part number AEG521 does not show up in any of my parts books. And the numbers on the end caps have been machined off.


And also why would the end caps have be machined like this?

Thanks Pete

_________________
A recent study found the average Aussie walks about 900 miles a year
Another study found Aussies drink, on average, 22 gallons of alcohol a year
That means, on average, Australians get about 41 miles per gallon

Kind of makes you proud to be an AUSSIE

1275 Cooper S dude.
Rods are like that because they have been balanced.
Some S rod caps had a recess machined in there, some like yours did not.
I have a set of each...

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Thanks Doc, those numbers are different in the book I have. Will have to add them to the list.

Pete

_________________
A recent study found the average Aussie walks about 900 miles a year
Another study found Aussies drink, on average, 22 gallons of alcohol a year
That means, on average, Australians get about 41 miles per gallon

Kind of makes you proud to be an AUSSIE

Part number AEG520 shows up as the early 1100S rod.
BMC sometimes has casting numbers one digit out from the part number, an example being the famous 648 cam with 649 stamped onto it.

Early 1100S rod and Cooper S were same really, I have a set of each and both are marked 521.
Not to be confused with the later 1100S ones (for 1.75" crankpin) with the dirty big lumps on them...

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Yep 1275 Cooper 'S'

177, early 1275 Cooper 'S'
521, 1275 Cooper 'S' and some 1100S
625, 1275 Sprite, Midget and some 1100S

Then came the large journal rods.......

Yes, the ones shown are in fact early 1100"S" type (small jhournal) & are essentially the same part & part # as cooper"S" but without the "Factory balancing" that the "S"`s got

rod caps are AEG145 i believe

easy-peasy

_________________
No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

Yeh, can just make out the numbers on one of the rod caps and it is AEG145.
Pete

_________________
A recent study found the average Aussie walks about 900 miles a year
Another study found Aussies drink, on average, 22 gallons of alcohol a year
That means, on average, Australians get about 41 miles per gallon

Kind of makes you proud to be an AUSSIE

It`s pretty cool really cause the later rods (521s) have the very same cap(145)

but don`t swap them over, allways keep the same cap with the same rod!!!!!!!!!!!

easy-peasy

_________________
No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.