Gerold,
quote.
Gold Seal Equivalents:
Engine Type Compression Gearbox Gold Seal Prefix
18G High Manual 48G 279; later 48G 343
18G Low Manual 48G 280
18GA High Manual 48G 343
18GA Low Manual 48G 344
18GB High Manual 48G 392; later 48G528 48G 739
18GB Low Manual 48G 393
18GD/GG Low Manual 48G 527; later 48G 736
18GD/GG High Manual 48G 528; later 48G 702 48G 755
18GD/GG Low Auto 48G 529; later 48G 736
18GD/GG High Auto 48G 530; later 48G 755
18GF/GH High Manual 48G 539; later 48G 704
18GJ/GK High Manual 48G 704
18V581/582/583 High Manual/Auto 48G 733
18V779/780 High Manual 48G 733
18V581/582/583 Low Manual/Auto 48G 736
18V584/585 Low Manual 48G 737
18V672/673 Low Manual 48G 737
18V836/837 Low Manual BHM 1074
18V797/798 Low Manual BHM 1105
18V801/802 Low Manual BHM 1105
18V846/847 High Manual BHM 1111
Notes: ◦BHM 1105 thought to apply also to later North American 18V883/884 18V890/891 and 18V892/893 engines.
◦February 2010: In practice Gold Seal engines have an 'E' or 'N' suffix letter as in 48G733E nnnnnn. The 'E' refers to an exchange engine, either fitted by a dealer or an owner. 'N' refers to an outright purchase i.e. no return of a faulty unit.
◦August 2010: Clausager also mentions the existence of engines in the USA with an 18S prefix, possibly 'general service engines' used to replace very early engines in dealer stocks where the pistons were found to be faulty. Also an engine with an 18SV prefix followed by the usual MGB code numbers in a later UK MGB.
unquote from
http://www.mgb-stuff.org.uk/enginetext.htm
Oder Du suchst nach "motor gold seal"
Bevor Du den alten Deckel benutzt, säubere ihn und prüfe Gängigkeit und Funktion und die Gummidichtung (falls diese porös ist => wegwerfen!).