This timing chain tension‑side lower guide 13085‑1N501 is a vulnerable timing‑system component for Nissan SR20DE 2.0L gasoline engine. Installed on lower tension side of timing chain, it limits lateral swing of timing chain, absorbs vibration impact and lowers friction loss during engine running, keeps timing‑chain running in correct track. It is aftermarket replacement for Nissan Sentra B14 and 200SX from 1991‑2001。
Adopts steel‑back reinforced nylon composite construction. Metal mounting base guarantees installation rigidity; high‑wear‑resistant nylon sliding surface bears long‑term friction contact with timing chain, delivers outstanding high‑temperature resistance and oil‑corrosion resistance. Precision‑drilled mounting holes fully match original installation points.
Common failure symptoms: timing‑chain rattling noise from engine front cover, heavy surface abrasion, guide rail cracking, increases risk of timing‑chain jump. Normally replaced together with timing chain, tensioner and other timing components during engine overhaul. Every guide rail passes dimension inspection before shipment, no modification required for installation. Important single spare‑part for SR20DE engine timing maintenance.
