I am sure that everyone is aware of the misery that has been caused by poor timing chain/tensioner design and all of the associated problems that this causes. My Honda dealer recently quoted £3k to change the chain on an 04 car that has a value of about £3k. Clearly this means that it is cheaper to scrap the car than repairing the fault and then take the risk of the VSA, Dual Mass Flywheel or the tailgate system failing. I bought a chain and tensioner and set too to change the chain myself. About 10 days later the engine developed an annoying knock and it transpires that No3 Piston has been hitting the cylinder head as the big end bearing has spun and disintegrated damaging the crank and con rod. Interstingly there was fresh oil in the sump (Lubetech 0-30) and the oil warning light did not illuminate. I offered Honda Technical my congratulations on their Audible Low Oil Level Warning System but inscrutibility won the day. Having spoken to at least half a dozen of the Honda Engine re-builders that are to be found on EBay I discovered that none of them fit new chains or tensioners when the rebuild these engines so you spend about £2k and can still end up with chain problems. They all want the old engine as an exchange so I would also lose the new chain and tensioner. I have now had the crank ground and have sourced some bearing for the rods - had to re-machine the tang locations and am starting to put it back together. I have now got to the oil change, tensioner etc and have decided to worry about these parts as well. I must say that the pump chain doesn't show the same amount of wear as the cam chain , which was in a poor condition but every article I read says both chains wear out. Does anyone have direct experience as the cost of the new pump chain and associated parts just make it all too expensive compared to the value of the car.