20 1 1 Model Corolla timing belt or timing chain?

20 1 1 corolla adopts timing chain, which is mainly used to drive the valve train of the engine, adjust the opening and closing time of the valve and ensure the normal operation of the engine. Replace the timing belt as follows: 1. Remove the valve cover, crankshaft pulley and timing chain cover; 2. Turn the crankshaft to 1 cylinder top dead center, and tighten the crankshaft fixing screw to fix the crankshaft; 3. Turn the intake and exhaust camshafts, align the grooves of the camshafts and clamp the special tools; 4. Remove the old chain and install the new one. There is no sliding key on the crankshaft pulley, so pay attention to the alignment of the round hole on the pulley and the groove on the chain shell during installation; 5. Adjust the installation clearance of the crankshaft position sensor to avoid fault codes. Sprockets and pulleys should be able to rotate freely. 200 1 corolla also uses timing chain.