Primary cover grommet hole

Hi Peter,

I’ve just measured my one and it’s 38mm diameter. Not sure if they’re all the same size or not - maybe someone  else will confirm my size or offer up another one. My cover if freshly painted in two coats of 2k paint but I don’t think the paint would change the sizing much.

Hope that helps

Regards

Tony

Might be an idea to order a grommet and measure that, to ensure the hole is sized to give a nice tight fit. That's what I did. HTH Alan.

Alan's answer is a good one. For reasons unknown, a new 'genuine' grommet isn't as tight in the hole on mine as the original was, necessitating a thin bead of silicon in the slot to stop the resulting oil weep. As to what size, I don't want to remove it to measure it as it will start the leak thing again. Sorry! 

George 

...probably they don't fit because someone measured the hole in millimetres...