Tappet adjuster nuts

[rskisser]

Hi all,

Does anyone know the size/thread of the tappet adjuster nuts on the 1275cc engine? I have one with a partially stripped thread and would like to buy some, but cant find them. If anyone knows where I can buy these please let me know.

thanks
Chris

[norway_triumph]

don't know the size but will think mini-spares/minimania and similar mini-specialists have them

[minispeedstar]

From memory they're 5/16unf

Earlier ones were 7/16

[MarinaCoupe]

There are three different types dependent on the age of your car/engine. BL changed the design of the tappet rocker and the tappet screw with it. As the 1275 Mini engines of the same period shared the same parts there is a readily available supply.

The tappet rockers will be one of these three designs, once you have identified the tappet rocker design I can tell you the part number of the tappet screw.

1. A pressed steel style where BL just squeezed a thick metal tube flat.

2. A cast type that still shows the casting surface on the parts that aren't machined.

3. A billet style from sintered steel which looks like it has been machined from solid steel.

If you are not sure post a picture of your rockers in situ and I'll let you know.

[minispeedstar]

These are used with the sintered type rockers

https://www.minispares.com/product/Clas ... |Back%20to

[MarinaCoupe]

www.somerfordmini.co.uk list all three types with different part numbers for each type of rocker and each type of matching tappet screw.