maybe if its done properlly then the it could come up to £500,
timing chain kits prob £80, H/G kit £70 bolts £30, skim £30-40 plus labour
hes got a 316i compact, so average book time is 7 odd hours
however the chain doesnt have to be changed. although false economy
dont quote me on price of parts as i didnt price them just guestimated.