2016 Mazda CX-5 GT AWD w/Tech Pkg
- Plano, Texas, USA
The ticking noise in the first video from OP is the valve clearance noise. Both members hearing such ticking noise claimed they didnt hear this noise until recent cold weather after the PCM update by the recall. Besides, accelerated warm-up happens every time we start a cold SkyActiv-G engine, this means we should hear such ticking noise each time we start a cold engine. But thats not the case from both reports.It sounds normal to me. According to Mazda, the engine retards timing 20 degrees during accelerated warmup and the loud ticking is fuel burning in the headers. It*s a Skyactiv engine trait that you will undoubtedly notice in the colder months. 100% normal.
My 2016 CX-5 doesnt have such ticking noise unless the engine hasnt been started for a long period of time. Even that, the ticking noise is gone within seconds.