Will a 12cm cpu cooler fit a 18.3cm case?

Perhaps if you told us what case it is and tell us where abouts you want to fit the fan...

Apologies,

Here is the case: http://www.scan.co.uk/products/cit-templar-micro-atx-case-all-black-with-500w-12cm-black-psu

Here are the dimentions: 180 x 360 x 425 (WxHxD mm)

Can you please mention the case and cpu cooler so that I would get a better idea.

The case is the cit templar the cpu cooler is: http://www.amazon.co.uk/Cooler-Master-Hyper-212-120mm/dp/B0068OI7T8/ref=sr_1_1?s=computers&ie=UTF8&qid=1377689862&sr=1-1&keywords=am3%2B+cpu+cooler

it might/should fit,most case are a standard width ,but if you are looking for ultimate cooling i would suggest a bigger case, as the link is showing a micro-atx case ,not much space in them for moving air for effincent cooling

Yes, I know:( I didn't realise when I built the rig that the case would be a problem as it was my first build... Was a very bad decision to go for a cheap case, However I might invest in a haf series case which are meant for high air flow, But it means taking apart and rebuilding the rig facepalm.

Thank you for your inputs though.