garage quoted me 560 as a minimum to take the head off and refit it to see if thats whats wrong, with no garentee that thats going to fix it as the head might be cracked or something im just gonna get another engine instead, good ol volksmania in bath are gonna charge me about 450 inc vat for an engine and fitting, which is cool cause assuming its a good one will potentially kill my crap idle too :d all good really, just gotta hope its a good engine