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11B323 - Plug core for support hole in the BMC 1500 and 1800 diesel cylinder head.
The core plug diameter is 3/4 " 19.22mm. This is a cup shape core plug.
Fitted to the following tractors:
Nuffield 4/25
Leyland 154, 302
Marshall 302
Also listed as part number 37D3077
Fitted to the following tractors:
Nuffield 4/65
Leyland 344, 384
Original equipment manufacturers names and parts numbers are quoted for reference purposes only and are not intended to suggest that our replacement parts are made by the original equipment manufacturer.
Product images are for illustrative purposes only and may not always be an exact representation of the product.

If you have slight pitting of the area where the core plug is fitted then you may get leaking. You can fit a new core plug with a bit of suitable bondloc B270 to ensure a good fit. Bondloc B270 is a high temperature Studlock suitable for this job. We sell this product on our website so why not add one to your shopping cart alongside the core plug?