From time to time, a rattle in the entrance with the engine doesn’t essentially signify the VCT gear is worn out. The timing chain manual on the SR20 and KA24 engines is known to loosen and rattle, knocking on the valve address given that the timing chain moves beneath it. https://jdm-nissan-sr20-turbo-eng60924.rimmablog.com/31350241/top-jdm-nissan-sr20-turbo-engine-for-sale-secrets