In some cases, a rattle with the entrance on the engine doesn’t necessarily signify the VCT gear is worn out. The timing chain manual over the SR20 and KA24 engines is understood to loosen and rattle, knocking on the valve go over given that the timing chain moves beneath it. https://jdm-nissan-sr20-turbo-eng11538.kylieblog.com/32509323/facts-about-jdm-nissan-sr20-turbo-engine-for-sale-revealed