hi, i have just converted a chain driven oil pump/balance shafts to gear driven. i borrowed proper timimg tool for balance shafts and locked up timing belt sprockets as usual. when i start the engine it sounds as noisey as it was before with chain and broken tensioner. when revved up to 1500rpm the noise disappears and returns again when idle. also a slight whinning noise. is this the new gears whinning?. anyone any ideas on these noises?.