Yes in mm. I had a similar problem when I fitted an electric water pump and did away with the belt driven one, it took me a few attemts but I got there in the end - can't remember which size it was now
So the 900 is too tight and the 925 to slack, it must be a 910 or 915 - I'd try a 915
So the 900 is too tight and the 925 to slack, it must be a 910 or 915 - I'd try a 915
