Hi Dave,
Here is an excerpt "ENGINES for M.G's, Their Story after 1935", By Neil
Cairns, that helps explain the MG numbering system but I don't think it
helps in identifying this engine.
Couldn't find anything that might help so I'm guessing it is not an MG
engine.
Charley Robinson
Nuffield System of Engine Identification & Numbering.
The Nuffield (Morris Engines) system of engine identification lasted well
into the post BMC merger, so some early 'A' and 'B' series engines used it,
( in Morris, Wolseley & MG models,) slightly modified. Prior to 1936 a two
letter code has been used, the four letter one follows:-
First letter-Model Second-Valves Third-Bore & HP Fourth-Make
.
U, Morris Eight S, side-valve H, 57mm 8hp M, Morris
M, Morris 10/4 P, Pushrod ohv J, 63.5mm 10hp G, M.G.
X, Morris 'M' 10hp C, overhead cam A, 66.5mm 11hp W, Wolseley
T, Morris 12/4 B, 69.5mm 12hp C,
Commercial
Q, 2ltr 6 cylinder E, 72mm 13hp
O, 3 1/2ltr 6 cylinder D, 73mm 13hp
A, 'A' series (A30) D, 61.5mm 14hp
V, Postwar Morris/Wolseley, H, 69.5mm 18hp (6 cylinder.)
B, 'B' series, ( Z Magnette, etc) E, 82mm 25hp, ( 6 cylinder.)
12, 1200cc ; 15, 1489cc,
22, 2200cc ; 26, 2693cc,
For instance reading 'XPAG' equates to" Morris 10/4 engine, OHV, 66.5mm bore
11hp, used in M.G." and 'BP15GA' was " 'B' series, pushrod ohv, 1489cc,
M.G. ZA". Some were never used by M.G. such a 'O' and 'V'. The 'V', 'A',
and the 'B' were used after the war, and dropped the 'HP' part, as the RAC
rating was out dated by then, replacing it with the cubic capacity, such as
the side valve Morris Cowley VS15M, the 15 being 1500cc,( actually 1476cc.)
The system is not bomb proof as 'E' equates to 72mm bore for 13hp as a four
cylinder, but jumps to a 82mm bore for a six cylinder 25hp engine! The 'X'
engines were called short-stroke Morris 'M' series,( Engine 102mm stroke M
series; not the car, the Morris Ten Series 'M'.) In the engine prefix
BP15GA, the end 'A' refers to the model, in this case a M.G. ZA Magnette,
BP15GB to the ZB, and so on.
-----Original Message-----
From: owner-mgs@autox.team.net [mailto:owner-mgs@autox.team.net] On Behalf
Of dave houser
Sent: Tuesday, July 18, 2006 6:31 PM
To: mgs@autox.team.net
Subject: [Fwd: engine serial number]
Can anyone help this friend of mine figure where this engine came
from? I suggested a Metropolitan.
TIA, Dave Houser
-------- Original Message --------
Subject: engine serial number
Date: Mon, 17 Jul 2006 14:07:32 -0400
From: Gerry Diepering <dieperin@tampabay.rr.com>
To: mgs4dave@tampabay.rr.com
hi dave,how are you. i got to ask you to shed some info on this eng. i
am going to rebuild and here is the # 15c-n-h 132764 the eng.block is
a mowog 1500 it is painted green it has a mechanical fuel pump it is a
interesting engine. i know it is a high comp. eng. what trows me of is
the letter n......
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