At times, a rattle in the entrance in the engine doesn’t automatically mean the VCT gear is worn out. The timing chain guideline within the SR20 and KA24 engines is understood to loosen and rattle, knocking within the valve cover since the timing chain moves beneath it. Rust is inevitable https://pageoftoday.com/story4079105/a-secret-weapon-for-jdm-nissan-sr20-turbo-engine-for-sale