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XPAG Casting Numbers

XPAG24001b

 

The MGCC T Register have posted more up to date research on casting numbers. go to

https://www.mgcc.co.uk/t-register/wp-content/uploads/sites/31/2016/02/Roger-Wilson-head-and-block-casting-numbers-20-12-2017-v7.pdf

 

The ‘casting number’ is not the ‘part number’ normally. It is the number of the wooden ‘pattern’ used to make the casting. The same ‘pattern’ may well be used for different applications decided upon by the way it is machined. This way a cylinder block may start as identical items but end up as a 1250cc MG TB engine or a Marine version of the Brockhouse ‘Morris’ boat engine; or a MG YB engine or the Wolseley 4/44 version. They will be differentiated by their ‘part numbers’ stamped into the machined metal or on a riveted tag. That on the cylinder block appears just behind the dynamo, the one on the head is on the top face.

Casting Numbers.

 

Model/Item……………………………………………………………………………………………..Casting Number

    • Early Morris/Wolseley Ten 1140cc ‘X’ cylinder block, oval,…………………. 22500
    • Later post war 1140cc cylinder block, oval water holes,…………………….. 24144
    • Very early 1250cc block with no timing chain tensioner,……………………..24001
    • Early M.G. 1250cc ‘X’ block, octagon cast in, oval water holes,……………..24142 & 24146
    • Later post war 1250cc M.G. block, octagon cast in, oval holes,……………..24445
    • 4/44, later TD, & TF block, no octagon, round water holes,………………….168421
    • Early 1140cc cylinder-head, no centre oil drain, oval water holes,………….22812
    • Later post war 1140cc head, same as early ‘T’ type, oval holes…………….22952
    • Later TD, & Y oval hole cylinder head, short reach plug,……………………..22952
    • 4/44, TD & TF head, round water holes, long reach plugs,…………………..168422
    • Late 4/44 head, round water holes,……………………………………………..168425

 

Casting numbers are often quite rough, the wooden pattern getting knocked about with use and age, so numbers can be difficult to see. On the block it is under the tappet chest cover, behind the dynamo, above the octagon if the block has one. On the cylinder head it is easy to see on the top, though often not fully clear, casting ‘flash’ obscuring it.

 

Neil Cairns.

Photograph by John Foster.

 

It may be of interest to read the page under the XPAG Files on the subject of XPAG – Round or Oval Holes in Head Gasket? in conjunction with this article.