406oc.co.uk

hi all. with the onset of colder weather my car has decided it doesnt want to stay running on first starting it up on cold mornings. i had this last year too and i removed and cleaned the stepper motor which did the trick . problem was 1 of the screws was soooooo tight i ended up butchering the head with a hacksaw blade so i could remove it with a screwdriver. my question is could some very kind soul with access to service box tell me what size screws hold it in so i can source some new ones before i remove the stepper again....
many thanks in advance