From time to time, a rattle from the entrance with the engine doesn’t automatically signify the VCT gear is worn out. The timing chain guidebook on the SR20 and KA24 engines is known to loosen and rattle, knocking on the valve include given that the timing chain moves beneath it. https://jdmnissansr20turboenginef59158.onesmablog.com/top-jdm-nissan-sr20-turbo-engine-for-sale-secrets-72554760