Hey, I have a 51 plate weekend 20v hlx leather etc. It's got 34k on the clock. The cambelt was last changed 4 years ago at 26k. I know it's due soon or now but would like to wait a few months. However when I look at the visible part of the belt whilst it looks recent there is cracking in the lines. When I say lines it's how that belt is e.g. grooved lines...am I looking at the cambelt? Every thing else it factory fresh like the rest of the car thanks.