My Celsior has a slight vibration when the engine is running at higher than 2200rpm. As I push the gas pedal, it becomes worth at 2500rpm and disappears at 2800rpm. Judging from the sound and the vibration, I first thought it was caused b…

My family's Honda Life once had this much of sludge. The valve cover. I wonder why the engine E07Z has built up so much of sludge. As I search the net, I find there are many E07Z engines that have too much sludge like below. http://kuruma…