1353867900 Toyota GEAR, IDLE SUB, NO.2, Price: 21.06$, Weight: 0.348kg

Engine Timing Idler Gear Sub‑Assembly ⚙️

This precision timing component supports and redirects the chain between the crankshaft and camshafts on select Toyota engines. It stabilizes chain travel, keeps alignment true, and cuts vibration. Install it during timing service, after guide/tensioner wear, or when cold‑start rattle appears to restore quiet, accurate valve timing. 🚗

Why this part is needed

Accurate valve timing depends on correct chain wrap and tension. The idler maintains the chain path so the cams stay synchronized with the crank. That means smooth idle, cleaner emissions, strong throttle response, and better fuel economy.

How it works

Mounted on a fixed stud, the free‑spinning gear turns on a low‑friction bearing. Hardened, ground teeth mesh with the timing chain while the carrier holds the exact offset. Heat treatment and anti‑corrosion finish handle high RPM, oil splash, and thermal cycles. ⛽

If the part fails

Expect start‑up rattles, rough idle, loss of power, misfire or cam/crank correlation codes, and metal glitter in oil. Worn teeth or a seized bearing can let the chain jump a tooth—risking bent valves and severe engine damage. ❗

Fitment and install tips

Choose OEM‑grade dimensions for proper mesh. Pre‑lube the bearing, inspect chain, guides, and tensioner, replace suspect fasteners, and torque to service‑manual specs. Align timing marks, rotate the engine two full turns by hand, then verify quiet operation on first start. 🔧