hi , right first i would like to know if anyone has a link to a how to clean my egr valve on my van ( 1.7 dti vauxhall low blow) and where its located .

secondly i might be able to get hold of a astra gsi and was wondering how hard the job is converting mine to a 2.0 ltr turbo etc ... any idiots guides for this or is it a nightmare ??
thanks guys