From time to time, a rattle with the front of your engine doesn’t automatically suggest the VCT gear is worn out. The timing chain guidebook on the SR20 and KA24 engines is understood to loosen and rattle, knocking on the valve cover as being the timing chain moves beneath it. https://jdmnissansr20turboenginef71481.blogunteer.com/31153710/top-jdm-nissan-sr20-turbo-engine-for-sale-secrets