Yea I've got the tick and its pissing me off I've tryd hydrolic lifter cleaner, engine flush and oil change also took it to a garage and had new fan belt wheels fitted as they thought it was bearings ticking but no it still remains!!! I had it on some ramps weekend and the rear manifold is leakin a little bit of oil which to me is the problem and creating the tick, apparently they can come lose and just need tightening up but I think replacing the would be better! It's defiantly not the head gasket 100%