Genuine Lexus ES300 Variable Timing Sprocket

Lexus ES300 Variable Timing Sprocket Parts Questions & Experts Answers

• Pulley, Camshaft Timing
  13523-20020
  Q: How to remove and install a timing belt and variable timing sprocket on the V6 engine of a Lexus ES300?

  A:

  Start by disconnecting the negcative cable from the car battery. Take out the coolant reservoir tank and windshield washer bottle. Then, take off the drive belts from the engine's alternaor and power steering pump. Keep the right front wheel's lug nuts loose, lift up the front of the car, support it on safe jack stands, engage the parking brake, block the rear wheels, and remove the right front wheel after that. Lift up the right inner fender, put your number one piston at top dead center, use a jack to hold up the engine's bottom side, and take away the engine movement control rod and its supportive bracket. Take out the spark plugs, the upper timing belt cover and its seal, then check that you left guides on the timing belt during installation. If new ones are needed, mark them with a pen. Get the marks on the camshaft pulley lined up correctly, take off the timing belt tensioner, ease the tension between the camshaft gears, then remove the timing belt. When camshaft sprockets are too worn or broken, you must take them off. Also, take off the valve cover to grab and hold the camshaft when you unfasten its bolt. Before work begins, take off the upper idler pulley, the crankshaft pulley bolt, and make sure the crankshaft's TDC position is correct. You should be able to remove the crankshaft pulley by hand applied force. If not, use two prybars to help lift it off. Drop the lower belt cover and gasket, slide the timing guide off the crankshaft, and check the belt's defect on the crankshaft sprocket where its marking matches a dot in the steel. Use an Allen key to take out both the idler pulley and its plate washer; replace the idler pulley and washer if they are broken or show signs of wear. Loosen up and inspect the belt tensioner for oily drips, test it for leaks, measure the height of the pushrod, and make sure both idler pulleys move freely. Clean the space where the timing belt goes, match the crankshaft and sprocket together, then put the sprocket properly into position. Protect your idler pulley bolt with thread-locking compound. Then, slide the idler pulley into place and start laying down the timing belt from the crankshaft sprocket side. First, place the belt guide over its pathway on the crankshaft. Then put on the lower belt cover with gasket. Lastly, fit the crankshaft pulley onto the crankshaft. Place the upper idler pulley, front camshaft sprocket, and secure the sprocket with its bolt. Recheck the valve timing position, add the rear camshaft gears, and bolt them securely. Put the front camshaft sprocket into small rotation, place the belt onto it, and then stretch it over to the rear sprocket. Before placing the timing belt tensioner, squeeze in its pushrod, put the tensioner in place, shove the crankshaft slowly clockwise twice while making sure the timing markers remain aligned. Reattach the bracket for the control rod, replace the timing belt cover on top, and reconnect the control rod and braces safely, tightening all bolts firmly. Replace all components in the order you took them off, working backwards.