engine number

[janstolp]

Someone on the Dutch Morris forum wants to know what engine he has.
His number is 8G162 ER87017
.Underneath that number is stamped AD.

It must be a gold seal engine because of 8G but I don't know about the other letters.

Regards
Jan

[mike.perry]

803 has a screw on oil filter on the side of the block
948 has 950 cast on the block above the tappet chest
1098 has 1100 on a plate above the tappet chest
1275 has no tappet chests

[janstolp]

Thank you Mike!
I hoped the letters could tell us something.
Regards jan

[PSL184]

GOLD SEAL EXCHANGE ENGINES.
BMC like many firms did an exchange scheme for worn engines, one was the Gold
Seal engine, a complete engine ready to fit and painted gold in colour. The other was
the Silver Seal exchange engine, basically a short-block for the owner/garage to fit the
old head,sump, and ancillories onto.
Both used a similar system of engine numbering, the original number being struck off.
Initially all engines in the scheme were prefixed 8G, soon a better system followed:-
'A' series engines were prefixed 8G,- 803cc, 848cc, 948cc, 1098cc, 1275cc.
'B' series were prefixed 84G,- 1200cc, 1489cc, 1588cc, 1622cc, 1798cc.
'C' series were prefixed 86G,- 2693cc, 2912cc.
The code after was to do with rebore/regrind sizes and a job number.

[janstolp]

I knew the number was difficult to "understand" but you made it clearer to me now.

Thank you .
regards Jan